CVE-2023-6936

Published: Feb 20, 2024Modified: Mar 26, 2025

9.1

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Exploitability: 3.9 / Impact: 5.2

Source: NVD

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).

Affected (1)

Products: Wolfssl: Wolfssl

Wolfssl

1 product

Wolfssl

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Wolfssl Wolfssl	Before 5.6.6

Related CWEs

CWE-125

Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

CWE-126

Buffer Over-read

The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

References (4)

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

Source: facts@wolfssl.com

Issue TrackingPatch

https://www.wolfssl.com/docs/security-vulnerabilities/

Source: facts@wolfssl.com

Vendor Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingPatch

https://www.wolfssl.com/docs/security-vulnerabilities/

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.