CVE-2018-1000140: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 9.3% chance of exploitation in the next 30 days.

rsyslog librelp version 1.2.14 and earlier contains a Buffer Overflow vulnerability in the checking of x509 certificates from a peer that can result in Remote code execution. This attack appear to be exploitable a remote attacker that can connect to rsyslog and trigger a stack buffer overflow by sending a specially crafted x509 certificate.

Affected products

• Canonical Ubuntu Linux: version 14.04 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Red Hat Enterprise Linux Desktop: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 6.6 only; version 7.2 only; version 7.3 only; version 7.4 only; version 7.6 only
• Red Hat Enterprise Linux Server Eus: version 6.7 only; version 7.3 only; version 7.4 only; version 7.5 only; version 7.6 only
• Red Hat Enterprise Linux Server Tus: version 6.6 only; version 7.2 only; version 7.3 only; version 7.4 only; version 7.6 only
• Red Hat Enterprise Linux Workstation: version 6.0 only; version 7.0 only
• Rsyslog Librelp: up to and including 1.2.14

Published 2018-03-23. Last modified 2026-06-17.