OWASP Top 10 Injection Tryhackme | tryhackme injection | owasp Top 10 tryhackme
OWASP TOP 10 vulnerabilities
Injection tryhackme
command injecction tryhackme
owasp top 10 vulnerability tryhackme
OWASP Top 10
Injection flaws are very common in applications today. These flaws occur because user controlled input is interpreted as actual commands or parameters by the application. Injection attacks depend on what technologies are being used and how exactly the input is interpreted by these technologies. Some common examples include:
Command Injection occurs when server-side code (like PHP) in a web application makes a system call on the hosting machine. It is a web vulnerability that allows an attacker to take advantage of that made system call to execute operating system commands on the server. Sometimes this won't always end in something malicious, like a whoami or just reading of files. That isn't too bad. But the thing about command injection is it opens up many options for the attacker. The worst thing they could do would be to spawn a reverse shell to become the user that the web server is running as. A simple ;nc -e /bin/bash is all that's needed and they own your server
Ways to Detect Active Command Injection
We know that active command injection occurs when you can see the response from the system call. In the above code, the function passthru() is actually what's doing all of the work here. It's passing the response directly to the document so you can see the fruits of your labor right there. Since we know that, we can go over some useful commands to try to enumerate the machine a bit further. The function call here to passthru() may not always be what's happening behind the scenes, but I felt it was the easiest and least complicated way to demonstrate the vulnerability.
Commands to try
Linux
whoami
id
ifconfig/ip addr
uname -a
ps -ef
Windows
whoami
ver
ipconfig
tasklist
netstat -an
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