Description
NULL pointer dereference in get_san_or_cn_from_cert() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted X.509 certificate that causes sk_GENERAL_NAME_value() to return NULL.
Published: 2025-11-24
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 01 Dec 2025 17:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:libcoap:libcoap:4.3.5:-:*:*:*:*:*:*

Thu, 27 Nov 2025 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Libcoap
Libcoap libcoap
Vendors & Products Libcoap
Libcoap libcoap

Mon, 24 Nov 2025 15:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 24 Nov 2025 14:15:00 +0000

Type Values Removed Values Added
Description NULL pointer dereference in get_san_or_cn_from_cert() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted X.509 certificate that causes sk_GENERAL_NAME_value() to return NULL.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-11-24T14:49:31.807Z

Reserved: 2025-11-18T00:00:00.000Z

Link: CVE-2025-65494

cve-icon Vulnrichment

Updated: 2025-11-24T14:47:55.754Z

cve-icon NVD

Status : Analyzed

Published: 2025-11-24T14:15:46.910

Modified: 2025-12-01T17:17:59.540

Link: CVE-2025-65494

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-11-27T09:45:30Z

Weaknesses