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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2023-6937 Detail

Description

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 (D)TLS 1.3, it was possible that an unencrypted (D)TLS 1.3 record from the server containing first a ServerHello message and then the rest of the first server flight would be accepted by a wolfSSL client. In (D)TLS 1.3 the handshake is encrypted after the ServerHello but a wolfSSL client would accept an unencrypted flight from the server. This does not compromise key negotiation and authentication so it is assigned a low severity rating.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/wolfSSL/wolfssl/pull/7029
https://www.wolfssl.com/docs/security-vulnerabilities/

Weakness Enumeration

CWE-ID CWE Name Source
CWE-20 Improper Input Validation wolfSSL Inc.  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-6937
NVD Published Date:
02/15/2024
NVD Last Modified:
02/15/2024
Source:
wolfSSL Inc.