HTB22924: Arbitrary Command Execution in phpAlbum.net

Vulnerability ID: HTB22924
Reference: http://www.htbridge.ch/advisory/arbitrary_command_execution_in_phpalbum_net.html
Product: phpAlbum.net
Vendor: Patrik Jakab ( http://www.phpalbum.net/ )
Vulnerable Version: 0.4.1-14_fix06
Vendor Notification: 31 March 2011
Vulnerability Type: Arbitrary Command Execution
Risk level: High
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)

Vulnerability Details:
Arbitrary command execution vulnerability allows an attacker to execute system commands on a vulnerable system.

The vulnerability exists due to failure in the "phpdatabase.php" script to properly sanitize user-supplied input in "var3" variable.

The following PoC is available:

http://host/main.php?cmd=setup&var1=user&var3=1-file_put_contents('./x.xxx','xxxx')