Vulnerability Monitor

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CVE-2023-6936

In wolfSSL prior to 5.6.6, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS client or network attacker can trigger a buffer over-read on the heap of 5 bytes (WOLFSSL_CALLBACKS is only intended for debugging).

Published

2024-02-20T22:15:08.197

Last Modified

2025-03-26T17:15:23.757

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.3 (MEDIUM)

Weaknesses

Type: Primary
CWE-125
Type: Secondary
CWE-126

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	wolfssl	wolfssl	< 5.6.6	Yes

References

https://github.com/wolfSSL/wolfssl/pull/6949/ Issue Tracking, Patch ([email protected])
https://www.wolfssl.com/docs/security-vulnerabilities/ Vendor Advisory ([email protected])
https://github.com/wolfSSL/wolfssl/pull/6949/ Issue Tracking, Patch (af854a3a-2127-422b-91ae-364da2661108)
https://www.wolfssl.com/docs/security-vulnerabilities/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)