CVE-2024-5814 MEDIUM

CVE-2024-5814: Unverifed Ciphersuite used on a client-side TLS1.3 Downgrade

Vendor Wolfssl
Product wolfSSL
Published August 27, 2024
Last update August 27, 2024

CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/AU:Y/V:D/RE:M/U:Green

What the vulnerability does

01Description

A malicious TLS1.2 server can force a TLS1.3 client with downgrade capability to use a ciphersuite that it did not agree to and achieve a successful connection. This is because, aside from the extensions, the client was skipping fully parsing the server hello. https://doi.org/10.46586/tches.v2024.i1.457-500

Key dates

02Disclosure timeline

August 27, 2024 CVE published
August 27, 2024 Record updated