CVE-2020-8444: ossec Use After Free

Vulnerability summary

CVE-2020-8444 is a critical (CVSS 9.8) Use After Free vulnerability in ossec. EPSS estimates a 2.49% chance of exploitation in the next 30 days, higher than 84.4% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 30-01-2020
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec-analysisd) is vulnerable to a use-after-free during processing of ossec-alert formatted msgs (received from authenticated remote agents and delivered to the analysisd processing queue by ossec-remoted).

• CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.