VDB-377207 · CVE-2026-60109 · EUVD-2026-42598

Zeek up to 8.0.8 Kerberos Protocol Analyzer proc_padata padata-type null pointer dereference

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7.2	$0-$5k	1.13-

Summaryinfo

A vulnerability was found in Zeek up to 8.0.8. It has been classified as critical. The affected element is the function proc_padata of the component Kerberos Protocol Analyzer. The manipulation of the argument padata-type leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2026-60109. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Zeek up to 8.0.8. It has been rated as critical. This issue affects the function proc_padata of the component Kerberos Protocol Analyzer. The manipulation of the argument padata-type with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-60109 since 07/08/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 8.0.9 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-42598). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Zeek

Version

Website

Product: https://github.com/zeek/zeek/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Zeek 8.0.9

Timelineinfo

07/08/2026 CVE reserved
07/09/2026 +1 days Advisory disclosed
07/09/2026 +0 days VulDB entry created
07/09/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-60109 (🔒)
GCVE (CVE): GCVE-0-2026-60109
GCVE (VulDB): GCVE-100-377207
EUVD: 🔒

Entryinfo

Created: 07/09/2026 16:34
Updated: 07/09/2026 18:41
Changes: 07/09/2026 16:34 (54), 07/09/2026 18:41 (1)
Complete: 🔍
Cache ID: 216::103