Description

Maltrail <= v0.54 is vulnerable to unauthenticated OS command injection during the login process.

Summary

The subprocess.check_output function in mailtrail/core/http.py contains a command injection vulnerability in the params.get("username")parameter.

An attacker can exploit this vulnerability by injecting arbitrary OS commands into the username parameter. The injected commands will be executed with the privileges of the running process. This vulnerability can be exploited remotely without authentication.

Proof of Concept

curl 'http://hostname:8338/login' \
  --data 'username=;`id > /tmp/bbq`'

Impact

Arbitrary command execution