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.
References
Link | Resource |
---|---|
https://github.com/wolfSSL/wolfssl/pull/6412 | Patch |
https://www.wolfssl.com/docs/security-vulnerabilities/ | Vendor Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: wolfSSL
Published: 2023-07-17T21:13:10.623Z
Updated: 2023-07-17T21:13:10.623Z
Reserved: 2023-07-17T21:06:23.613Z
Link: CVE-2023-3724
JSON object: View
NVD Information
Status : Analyzed
Published: 2023-07-17T22:15:09.587
Modified: 2023-07-28T13:54:14.647
Link: CVE-2023-3724
JSON object: View
Redhat Information
No data.