CVE-2020-8443: Ossec

Critical severity, CVSS 9.8. EPSS: 2.7% chance of exploitation in the next 30 days.

In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec-analysisd) is vulnerable to an off-by-one heap-based buffer overflow during the cleaning of crafted syslog msgs (received from authenticated remote agents and delivered to the analysisd processing queue by ossec-remoted).

Affected products

• Ossec Ossec: from 2.7, up to and including 3.5.0

Published 2020-01-30. Last modified 2026-06-17.