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Vulnerability record · CVE-2019-12175 · published 17 July 2019

CVE-2019-12175: Zeek null pointer dereference vulnerability

Zeek · Zeek

In Zeek Network Security Monitor (formerly known as Bro) before 2.6.2, a NULL pointer dereference in the Kerberos (aka KRB) protocol parser leads to DoS because a case-type index is mishandled.

7.5 CVSS 3.0 High EPSS 1.4% · top 28.4% CWE-476 · NULL pointer dereference
7.5CVSS 3.0 base score, v2 5.0
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

In Zeek Network Security Monitor (formerly known as Bro) before 2.6.2, a NULL pointer dereference in the Kerberos (aka KRB) protocol parser leads to DoS because a case-type index is mishandled.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/zeek/zeek/releases/tag/v2.6.2 Release NotesThird Party Advisory
https://github.com/zeek/zeek/releases/tag/v2.6.2 Release NotesThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.7CVE-2026-60108Zeek allocation without limits vulnerabilityZeek before 8.0.9 contains an uncontrolled memory consumption vulnerability in the FTP analyzer that allows unauthenticated remote attackers to cause…EPSS 0.79%8.7CVE-2026-60109Zeek null pointer dereference vulnerabilityZeek before 8.0.9 contains a null pointer dereference vulnerability in its Kerberos protocol analyzer that allows unauthenticated remote attackers to…EPSS 0.92%7.5CVE-2021-41732Zeek http request smuggling vulnerabilityAn issue was discovered in zeek version 4.1.0. There is a HTTP request splitting vulnerability that will invalidate any ZEEK HTTP based security anal…EPSS 0.88%6.2CVE-2026-21525Windows Remote Access Connection Manager null pointer dereference DoSWindows Remote Access Connection Manager contains a null pointer dereference (CWE-476) that lets an unauthorized attacker deny service locally. The f…KEVEPSS 4.8%analysed

Source: NIST National Vulnerability Database (record CVE-2019-12175), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.