Description
Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.5.0 until 4.14.6 and 5.0.0-beta2, compare_wazuh_versions() in src/shared/version_op.c copies the attacker-controlled enrollment V: field into a 10-byte stack buffer with strncpy() but does not explicitly terminate the buffer. The function is reachable before authentication through wazuh-authd on TCP port 1515 when anonymous TLS enrollment is enabled. A version string of at least nine non-null bytes can cause strchr() and strtok() to read beyond ver2 and can make strtok() write a null byte into adjacent stack memory, allowing a remote denial of service. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.
Affected products
wazuh: wazuh
References5
- github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6r ExploitVendor Advisory
- github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8d… Patch
- github.com/wazuh/wazuh/pull/36059 Issue TrackingPatch
- github.com/wazuh/wazuh/releases/tag/v4.14.6 PatchRelease Notes
- github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2 PatchRelease Notes
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 60 · as of 10 November 2026
- CWE
- CWE-121CWE-170
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