CVE-2008-5617: Rsyslog

High severity, CVSS 8.5. EPSS: 2.2% chance of exploitation in the next 30 days.

The ACL handling in rsyslog 3.12.1 to 3.20.0, 4.1.0, and 4.1.1 does not follow $AllowedSender directive, which allows remote attackers to bypass intended access restrictions and spoof log messages or create a large number of spurious messages.

Affected products

• Rsyslog Rsyslog: version 3.12.1 only; version 3.12.2 only; version 3.12.3 only; version 3.12.4 only; version 3.12.5 only; version 3.13.0 only; …

Published 2008-12-17. Last modified 2026-06-16.