Security Risk Category

network-security Security Risks

Published vulnerability pages connected to network-security. One risk can appear in multiple categories while keeping one canonical page.

network-security risks

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high

Zeek Kerberos Analyzer Null Pointer Dereference Vulnerability

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.

CVE-2026-60109zeeknetwork-security

Updated Jul 9, 2026