Maltrail is a malicious traffic detection system, utilizing publicly available blacklists containing malicious and/or generally suspicious trails. Maltrail versions below 0.54 suffer from a command injection vulnerability. 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. Successfully tested against Maltrail versions 0.52 and 0.53.
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The document in this archive illustrates using the included proof of concept exploit to achieve root on Ubuntu systems using a flaw in the OverlayFS file system. The exploit itself does not have author attribution as the proof of concept came through SSD Disclosures.
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