CVE-2023-6937

Name
CVE-2023-6937
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
patch https://github.com/wolfSSL/wolfssl/pull/7029
vendor-advisory https://www.wolfssl.com/docs/security-vulnerabilities/

Match rules

CPE URI Source package Min version Max version
wolfssl >= 0 <= 5.6.4
cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* wolfssl >= None < 5.6.6

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
wolfssl edge-community 5.7.0-r0 Jakub Jirutka <jakub@jirutka.cz> fixed
wolfssl edge-community 5.6.6-r0 None fixed
wolfssl edge-community 5.6.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.5.3-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.5.1-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.5.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.4.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl 3.22-community 5.6.6-r0 None fixed
wolfssl 3.22-community 5.6.2-r0 None possibly vulnerable
wolfssl 3.22-community 5.5.3-r0 None possibly vulnerable
wolfssl 3.22-community 5.5.1-r0 None possibly vulnerable
wolfssl 3.22-community 5.5.0-r0 None possibly vulnerable
wolfssl 3.22-community 5.4.0-r0 None possibly vulnerable
wolfssl 3.21-community 5.6.6-r0 None fixed
wolfssl 3.20-community 5.7.0-r0 Jakub Jirutka <jakub@jirutka.cz> fixed
wolfssl 3.20-community 5.6.6-r0 None fixed
wolfssl 3.19-community 5.6.6-r0 None fixed