What is CVE-2023-6937?

CVE-2023-6937 is a medium-severity vulnerability in Wolfssl, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2024-02-15.

How severe is CVE-2023-6937?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2023-6937 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Wolfssl

CVE-2023-6937

wolfSSL prior to 5.6.6 did not check that messages in one (D)TLS record do not span key boundaries. As a result, it was possible to combine (D)TLS messages using different keys into one (D)TLS record. The most extreme edge case is that, in…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.005 (39.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Wolfssl — versions 0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

References

facts@wolfssl.com (Patch, patch, Issue Tracking)
facts@wolfssl.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2023-6937?: CVE-2023-6937 is a medium-severity vulnerability in Wolfssl, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2024-02-15.
How severe is CVE-2023-6937?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2023-6937 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.