CVE-2024-5814

Unverifed Ciphersuite used on a client-side TLS1.3 Downgrade

Medium · published August 27, 2024

CVSS v4.0
5.1
EPSS
0%
Percentile
39.4
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
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
EPSS
0.00466 · 39.4th percentile
Published
2024-08-27T18:38Z
EPSS history
Timeline
  • 27 AUG 18:38Z
    Unverifed Ciphersuite used on a client-side TLS1.3 Downgrade
    cvelistv5