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.
Metrics
Affected Vendors & Products
References
History
Mon, 01 Dec 2025 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:libcoap:libcoap:4.3.5:-:*:*:*:*:*:* |
Mon, 01 Dec 2025 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Libcoap
Libcoap libcoap |
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| Vendors & Products |
Libcoap
Libcoap libcoap |
Mon, 24 Nov 2025 15:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-195 | |
| Metrics |
cvssV3_1
|
Mon, 24 Nov 2025 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| References |
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Status: PUBLISHED
Assigner: mitre
Published: 2025-11-24T00:00:00.000Z
Updated: 2025-11-24T14:41:15.867Z
Reserved: 2025-11-18T00:00:00.000Z
Link: CVE-2025-65495
Updated: 2025-11-24T14:40:09.060Z
Status : Analyzed
Published: 2025-11-24T14:15:47.053
Modified: 2025-12-01T17:15:30.583
Link: CVE-2025-65495
No data.