7.5
CVE-2026-45798
- EPSS 0.89%
- Veröffentlicht 19.08.2026 16:20:54
- Zuletzt bearbeitet 15.09.2026 19:25:59
- Erkennungen
LoginWazuh: Pre-auth stack-buffer-overflow in compare_wazuh_versions reachable from wazuh-authd (TCP/1515) via crafted enrollment V: field
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.
| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.89% | 0.568 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| security-advisories@github.com | 7.5 | 3.9 | 3.6 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
|
CWE-121 Stack-based Buffer Overflow
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CWE-170 Improper Null Termination
The product does not terminate or incorrectly terminates a string or array with a null character or equivalent terminator.
https://github.com/wazuh/wazuh/releases/tag/v4.14.6
https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2
https://github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6r
https://github.com/wazuh/wazuh/pull/36059
https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44