If a TLS 1.3 client gets neither a PSK (pre shared key) extension nor a KSE (key share extension) when connecting to a malicious server, a default predictable buffer gets used for the IKM (Input Keying Material) value when generating the session master secret. Using a potentially known IKM value when generating the session master secret key compromises the key generated, allowing an eavesdropper to reconstruct it and potentially allowing access to or meddling with message contents in the session. This issue does not affect client validation of connected servers, nor expose private key information, but could result in an insecure TLS 1.3 session when not controlling both sides of the connection. wolfSSL recommends that TLS 1.3 client side users update the version of wolfSSL used. 
History

Tue, 29 Oct 2024 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: wolfSSL

Published: 2023-07-17T21:13:10.623Z

Updated: 2024-10-29T15:53:43.066Z

Reserved: 2023-07-17T21:06:23.613Z

Link: CVE-2023-3724

cve-icon Vulnrichment

Updated: 2024-08-02T07:01:57.504Z

cve-icon NVD

Status : Modified

Published: 2023-07-17T22:15:09.587

Modified: 2024-11-21T08:17:55.267

Link: CVE-2023-3724

cve-icon Redhat

No data.