CVE-2023-6936

Published: Feb 20, 2024

Modified: Mar 26, 2025

PUBLISHED

CVSS v3.1

5.3

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).

Vendor	Product	Versions
wolfSSL	wolfSSL	affected `0 - <= 5.6.5`

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

References

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

patch

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

vendor-advisory

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CVE-2023-6936

Description

Affected Products

CVSS v3.1 Details

References