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CVE-2023-6936

Date: February 20, 2024

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).

Language: C

Severity Score

Related Resources (6)

https://nvd.nist.gov/vuln/detail/CVE-2023-6936
https://github.com/wolfSSL/wolfssl/commit/2b1c61a013a2f583160decca97540c5cd3be9abb
https://github.com/wolfSSL/wolfssl/pull/6949/
https://security-tracker.debian.org/tracker/CVE-2023-6936
https://www.wolfssl.com/docs/security-vulnerabilities/
https://www.mend.io/vulnerability-database/CVE-2023-6936

Severity Score

Weakness Type (CWE)

Out-of-bounds Read

CWE-125

Buffer Over-read

CWE-126

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

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