9.1 - CVE-2023-6936

Executive Summary

Informations
Name	CVE-2023-6936	First vendor Publication	2024-02-20
Vendor	Cve	Last vendor Modification	2025-03-26

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Overall CVSS Score	9.1
Base Score	9.1	Environmental Score	9.1
impact SubScore	5.2	Temporal Score	9.1
Exploitabality Sub Score	3.9

Attack Vector	Network	Attack Complexity	Low
Privileges Required	None	User Interaction	None
Scope	Unchanged	Confidentiality Impact	High
Integrity Impact	None	Availability Impact	High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score	N/A	Attack Range	N/A
Cvss Impact Score	N/A	Attack Complexity	N/A
Cvss Expoit Score	N/A	Authentication	N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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).

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6936

CWE : Common Weakness Enumeration

%	Id	Name
100 %	CWE-125	Out-of-bounds Read

CPE : Common Platform Enumeration

Type	Description	Count
Application	Wolfssl cpe:2.3:a:wolfssl:wolfssl:5.3.0:::::::* cpe:2.3:a:wolfssl:wolfssl:4.3.0:::::::* cpe:2.3:a:wolfssl:wolfssl:4.1.0:::::::* cpe:2.3:a:wolfssl:wolfssl:4.0:-:::::: cpe:2.3:a:wolfssl:wolfssl::::::::	5

Sources (Detail)

https://github.com/wolfSSL/wolfssl/pull/6949/
https://www.wolfssl.com/docs/security-vulnerabilities/

Source	Url

Alert History

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Date	Informations
2025-03-26 21:21:28	Multiple Updates
2025-02-12 21:20:51	Multiple Updates
2024-11-25 09:26:57	Multiple Updates
2024-02-23 00:27:24	Multiple Updates
2024-02-21 05:27:23	First insertion