webeasy

Ping Pwn

hackerdna

Task: Flask ping utility with user input passed to os.popen() without sanitization. Solution: OS command injection via semicolon separator to execute arbitrary commands as root and read flag.

$ ls tags/ techniques/

command_injection ping flask rce python os_command_injection os_popen no_sanitization

OS command injection via shell metacharactersSemicolon command separatorPipe command chainingNewline injection (%0a)

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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