What’s Vulnerable › Vulnerabilities

CVE-2020-8443

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-01-30 · updated 2026-06-17
• Weakness: CWE-193

Description

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: from 2.7 through 3.5.0

References

• https://github.com/ossec/ossec-hids/issues/1816
• https://github.com/ossec/ossec-hids/issues/1821
• https://security.gentoo.org/glsa/202007-33
• https://www.ossec.net/
• https://github.com/ossec/ossec-hids/issues/1816
• https://github.com/ossec/ossec-hids/issues/1821
• https://security.gentoo.org/glsa/202007-33
• https://www.ossec.net/

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