Bug 2498526 (CVE-2026-60109) - CVE-2026-60109 zeek: Zeek: Denial of Service via crafted Kerberos KRB_ERROR message
Summary: CVE-2026-60109 zeek: Zeek: Denial of Service via crafted Kerberos KRB_ERROR m...
Keywords:
Status: NEW
Alias: CVE-2026-60109
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2499666 2499667
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-09 15:01 UTC by OSIDB Bzimport
Modified: 2026-07-13 13:17 UTC (History)
0 users

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Description OSIDB Bzimport 2026-07-09 15:01:28 UTC 
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.
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