CVE-2024-5814

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

Published Aug 27, 2024 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
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

Remediation

Vendor Solution

Update wolfSSL to 5.7.2.


Vendor Workaround

On client side, use the wolfSSL methods for specific protocol versions instead of the downgrade API.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-46962 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
History
Type Values Removed Values Added
CPEs cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Type Values Removed Values Added
First Time appeared Wolfssl
Wolfssl wolfssl
Weaknesses CWE-284
CPEs cpe:2.3:a:wolfssl:wolfssl:-:*:*:*:*:*:*:*
Vendors & Products Wolfssl
Wolfssl wolfssl
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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
Title Unverifed Ciphersuite used on a client-side TLS1.3 Downgrade
References
Metrics cvssV4_0

{'score': 5.1, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
wolfSSL
Published
Updated
Aug 27, 2024, 7:21 PM
Reserved
Jun 10, 2024, 7:48 PM
Status
Analyzed
Published
Aug 27, 2024, 7:15 PM
Modified
Jun 17, 2026, 8:16 AM