CVE-2023-6936

Medium

Description

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).

SeverityMedium

CVSS5.3

Exploit probability—

ProductWolfssl

PublishedFeb 20, 2024

First seenFeb 20, 2024

Weakness typeCWE-126CWE-126

How to fix

Update

wolfssl wolfssl5.6.6 or later

Patches

github.com/wolfSSL/wolfssl/pull/6949/

Vendor advisories

wolfssl.com/docs/security-vulnerabilities/

Affected products

Product	Affected versions	Fixed in
wolfssl wolfssl	v < 5.6.6	5.6.6

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