CVE-2025-65499
Dec. 1, 2025, 4:29 p.m.
4.3
Medium
Description
Array index 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 DTLS handshake that triggers SSL_get_ex_data_X509_STORE_CTX_idx() to return -1.
Product(s) Impacted
| Vendor | Product | Versions |
|---|---|---|
| Libcoap |
|
|
Weaknesses
Common security weaknesses mapped to this vulnerability.
CWE-129
Improper Validation of Array Index
The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.
*CPE(s)
Affected systems and software identified for this CVE.
| Type | Vendor | Product | Version | Update | Edition | Language | Software Edition | Target Software | Target Hardware | Other Information |
|---|---|---|---|---|---|---|---|---|---|---|
| a | libcoap | libcoap | 4.3.5 | / | / | / | / | / | / | / |
Tags
CVSS Score
CVSS Data - 3.1
- Attack Vector: NETWORK
- Attack Complexity: LOW
- Privileges Required: NONE
- Scope: UNCHANGED
- Confidentiality Impact: NONE
- Integrity Impact: NONE
- Availability Impact: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Timeline
Published: Nov. 24, 2025, 2:15 p.m.
Last Modified: Dec. 1, 2025, 4:29 p.m.
Last Modified: Dec. 1, 2025, 4:29 p.m.
Status : Analyzed
CVE has had analysis completed and all data associations made.
More infoSource
cve@mitre.org
*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.