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Update command-injection.md

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Taleb Qasem 2022-10-10 06:18:23 +06:00 committed by GitHub
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pentesting-web/command-injection.md
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@ -22,7 +22,7 @@ Get Access Today:
## What is command Injection?
OS command injection (also known as shell injection) is a web security vulnerability that allows an attacker to execute arbitrary operating system (OS) commands on the server that is running an application, and typically fully compromise the application and all its data. (From [here](https://portswigger.net/web-security/os-command-injection)).
OS command injection (also known as shell injection) is a web security vulnerability that allows an attacker to execute an arbitrary operating system (OS) commands on the server that is running an application, and typically fully compromise the application and all its data. (From [here](https://portswigger.net/web-security/os-command-injection)).
### Context
@ -44,14 +44,14 @@ $(ls) # $()
ls; id # ; Chain commands
ls${LS_COLORS:10:1}${IFS}id # Might be useful
#Not execute but may be interesting
#Not executed but may be interesting
> /var/www/html/out.txt #Try to redirect the output to a file
< /etc/passwd #Try to send some input to the command
```
### **Limition** Bypasses
If you are trying to execute **arbitrary commands inside a linux machine** you will be interesting in read about this **Bypasses:**
If you are trying to execute **arbitrary commands inside a linux machine** you will be interested to read about this **Bypasses:**
{% content-ref url="../linux-hardening/useful-linux-commands/bypass-bash-restrictions.md" %}
[bypass-bash-restrictions.md](../linux-hardening/useful-linux-commands/bypass-bash-restrictions.md)
@ -107,7 +107,7 @@ Get Access Today:
### Time based data exfiltration
Extracting data : char by char
Extracting data: char by char
```
swissky@crashlab▸ ~ ▸ $ time if [ $(whoami|cut -c 1) == s ]; then sleep 5; fi