Vulnerability Details : CVE-2023-6936
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).
Products affected by CVE-2023-6936
- cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-6936
0.10%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 42 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-6936
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
3.9
|
1.4
|
wolfSSL Inc. | 2024-02-20 |
9.1
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
3.9
|
5.2
|
NIST | 2025-02-12 |
CWE ids for CVE-2023-6936
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2023-6936
-
https://github.com/wolfSSL/wolfssl/pull/6949/
fix WOLFSSL_CALLBACK memory error by bigbrett · Pull Request #6949 · wolfSSL/wolfssl · GitHubIssue Tracking;Patch
-
https://www.wolfssl.com/docs/security-vulnerabilities/
wolfSSL Security Vulnerabilities | wolfSSL Embedded SSL/TLS LibraryVendor Advisory
Jump to