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8 vulnerabilities by zeek
CVE-2026-60109 (GCVE-0-2026-60109)
Vulnerability from nvd – Published: 2026-07-09 14:19 – Updated: 2026-07-14 22:03 X_Open Source
VLAI
EPSS
VEX
Title
Zeek < 8.0.9 Null Pointer Dereference DoS via Kerberos KRB_ERROR Parsing
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zeek/zeek/releases/tag/v8.0.9 | release-notes |
| https://github.com/zeek/zeek/commit/c82e3c734893d… | patch |
| https://www.vulncheck.com/advisories/zeek-null-po… | third-party-advisory |
Date Public
2026-07-06 00:00
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CVE-2026-60108 (GCVE-0-2026-60108)
Vulnerability from nvd – Published: 2026-07-09 14:16 – Updated: 2026-07-14 22:03 X_Open Source
VLAI
EPSS
VEX
Title
Zeek < 8.0.9 Uncontrolled Memory Consumption DoS via FTP Analyzer
Summary
Zeek before 8.0.9 contains an uncontrolled memory consumption vulnerability in the FTP analyzer that allows unauthenticated remote attackers to cause process termination by sending a crafted FTP control session negotiating AUTH GSSAPI followed by a large ADAT control line. Attackers can exploit the NVT_Analyzer component's lack of a maximum line length check, causing it to continuously double its internal buffer without bounds during base64 decoding of an attacker-controlled ADAT token, resulting in denial of service of the Zeek sensor.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zeek/zeek/releases/tag/v8.0.9 | release-notes |
| https://github.com/zeek/zeek/commit/93ff6950a90cf… | patch |
| https://www.vulncheck.com/advisories/zeek-uncontr… | third-party-advisory |
Date Public
2026-07-06 00:00
Credits
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CVE-2021-41732 (GCVE-0-2021-41732)
Vulnerability from nvd – Published: 2021-09-29 18:34 – Updated: 2024-08-04 03:15 Disputed
VLAI
EPSS
VEX
Summary
An issue was discovered in zeek version 4.1.0. There is a HTTP request splitting vulnerability that will invalidate any ZEEK HTTP based security analysis. NOTE: the vendor's position is that the observed behavior is intended
Severity
8.2 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/zeek/zeek/issues/1798 | x_refsource_MISC |
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CVE-2019-12175 (GCVE-0-2019-12175)
Vulnerability from nvd – Published: 2019-07-17 16:40 – Updated: 2024-08-04 23:10
VLAI
EPSS
VEX
Summary
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.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/zeek/zeek/releases/tag/v2.6.2 | x_refsource_CONFIRM |
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CVE-2026-60109 (GCVE-0-2026-60109)
Vulnerability from cvelistv5 – Published: 2026-07-09 14:19 – Updated: 2026-07-14 22:03 X_Open Source
VLAI
EPSS
VEX
Title
Zeek < 8.0.9 Null Pointer Dereference DoS via Kerberos KRB_ERROR Parsing
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zeek/zeek/releases/tag/v8.0.9 | release-notes |
| https://github.com/zeek/zeek/commit/c82e3c734893d… | patch |
| https://www.vulncheck.com/advisories/zeek-null-po… | third-party-advisory |
Date Public
2026-07-06 00:00
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CVE-2026-60108 (GCVE-0-2026-60108)
Vulnerability from cvelistv5 – Published: 2026-07-09 14:16 – Updated: 2026-07-14 22:03 X_Open Source
VLAI
EPSS
VEX
Title
Zeek < 8.0.9 Uncontrolled Memory Consumption DoS via FTP Analyzer
Summary
Zeek before 8.0.9 contains an uncontrolled memory consumption vulnerability in the FTP analyzer that allows unauthenticated remote attackers to cause process termination by sending a crafted FTP control session negotiating AUTH GSSAPI followed by a large ADAT control line. Attackers can exploit the NVT_Analyzer component's lack of a maximum line length check, causing it to continuously double its internal buffer without bounds during base64 decoding of an attacker-controlled ADAT token, resulting in denial of service of the Zeek sensor.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zeek/zeek/releases/tag/v8.0.9 | release-notes |
| https://github.com/zeek/zeek/commit/93ff6950a90cf… | patch |
| https://www.vulncheck.com/advisories/zeek-uncontr… | third-party-advisory |
Date Public
2026-07-06 00:00
Credits
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CVE-2021-41732 (GCVE-0-2021-41732)
Vulnerability from cvelistv5 – Published: 2021-09-29 18:34 – Updated: 2024-08-04 03:15 Disputed
VLAI
EPSS
VEX
Summary
An issue was discovered in zeek version 4.1.0. There is a HTTP request splitting vulnerability that will invalidate any ZEEK HTTP based security analysis. NOTE: the vendor's position is that the observed behavior is intended
Severity
8.2 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/zeek/zeek/issues/1798 | x_refsource_MISC |
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CVE-2019-12175 (GCVE-0-2019-12175)
Vulnerability from cvelistv5 – Published: 2019-07-17 16:40 – Updated: 2024-08-04 23:10
VLAI
EPSS
VEX
Summary
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.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
1 reference
| URL | Tags |
|---|---|
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"datePublished": "2019-07-17T16:40:14.000Z",
"dateReserved": "2019-05-18T00:00:00.000Z",
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