CVE-2018-1000857: Open-Systems Log-User-Session

High severity, CVSS 8.8. EPSS: 3.3% chance of exploitation in the next 30 days.

log-user-session version 0.7 and earlier contains a Directory Traversal vulnerability in Main SUID-binary /usr/local/bin/log-user-session that can result in User to root privilege escalation. This attack appear to be exploitable via Malicious unprivileged user executes the vulnerable binary/(remote) environment variable manipulation similar shell-shock also possible.

Affected products

• Open-Systems Log-User-Session: up to and including 0.7

Published 2018-12-20. Last modified 2026-06-17.