Description
Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 1.0.0 to before version 4.14.4, a heap-based out-of-bounds WRITE occurs in GetAlertData, resulting in writing a NULL byte exactly 1 byte before the start of the buffer allocated by strdup. Due to unsigned integer underflow and pointer arithmetic wrapping, the write lands at offset -1 from the buffer, corrupting heap metadata. A malicious actor can potentially leverage this issue through a compromised agent to cause denial of service or heap corruption by injecting a specially crafted alert into the alerts log file monitored by wazuh-logcollector. This issue has been patched in version 4.14.4.
Problem types
CWE-124: Buffer Underwrite ('Buffer Underflow')
CWE-191: Integer Underflow (Wrap or Wraparound)
Product status
References
github.com/.../wazuh/security/advisories/GHSA-j4c7-hwjw-8857
github.com/.../wazuh/security/advisories/GHSA-j4c7-hwjw-8857
github.com/wazuh/wazuh/releases/tag/v4.14.4