Vulnerability Description
Zeek before 8.0.9 contains a null pointer dereference vulnerability in its Kerberos protocol analyzer that allows unauthenticated remote attackers to crash the sensor by sending a crafted KRB_ERROR message with error-code 25 (KDC_ERR_PREAUTH_REQUIRED) containing a PA-DATA element with padata-type 2, 3, 11, or 19. Attackers can exploit a parser and analyzer state mismatch where proc_padata() dereferences an uninitialized pa_data_element field selected by the wrong parsing arm, triggering a crash via a single UDP or TCP packet to port 88 without any credentials or prior authentication.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zeek | Zeek | < 8.0.9 |
Related Weaknesses (CWE)
References
- https://github.com/zeek/zeek/commit/c82e3c734893d932e94310aec0dbeb1ffcea169dPatch
- https://github.com/zeek/zeek/releases/tag/v8.0.9Release Notes
- https://www.vulncheck.com/advisories/zeek-null-pointer-dereference-dos-via-kerbeThird Party Advisory
FAQ
What is CVE-2026-60109?
CVE-2026-60109 is a vulnerability with a CVSS score of 7.5 (HIGH). Zeek before 8.0.9 contains a null pointer dereference vulnerability in its Kerberos protocol analyzer that allows unauthenticated remote attackers to crash the sensor by sending a crafted KRB_ERROR me...
How severe is CVE-2026-60109?
CVE-2026-60109 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-60109?
Check the references section above for vendor advisories and patch information. Affected products include: Zeek Zeek.