CVE-2025-65495

EPSS 0.12%
Veröffentlicht 24.11.2025 00:00:00
Zuletzt bearbeitet 01.12.2025 17:15:30
Quelle cve@mitre.org
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Integer signedness error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted TLS certificate that causes i2d_X509() to return -1 and be misused as a malloc() size parameter.

Betroffene Produkte Warnungen 0 Metriken 2 CWE 1 Referenzen 5

Daten sind bereitgestellt durch National Vulnerability Database (NVD)

Libcoap ≫ Libcoap Version4.3.5 Update-

Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.

EPSS Metriken
Typ	Quelle	Score	Percentile
EPSS	FIRST.org	0.12%	0.319

CVSS Metriken
Quelle	Base Score	Exploit Score	Impact Score	Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0	7.5	3.9	3.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-195 Signed to Unsigned Conversion Error

The product uses a signed primitive and performs a cast to an unsigned primitive, which can produce an unexpected value if the value of the signed primitive can not be represented using an unsigned primitive.

https://github.com/obgm/libcoap/pull/1750

Patch

Issue Tracking

https://github.com/obgm/libcoap/issues/1744

Issue Tracking

https://nvd.nist.gov/vuln/detail/CVE-2025-65495

CVE Source (NVD)

https://cveawg.mitre.org/api/cve/CVE-2025-65495

CVE Source (JSON)

https://euvd.enisa.europa.eu/vulnerability/CVE-2025-65495

EUVD