CVE-2025-11934
Improper Validation of Signature Algorithm Used in TLS 1.3 CertificateVerify
Summary
Improper Validation of Signature Algorithm Used in TLS 1.3 CertificateVerify
Original description
The description as published by the source.
Improper input validation in the TLS 1.3 CertificateVerify signature algorithm negotiation in wolfSSL 5.8.2 and earlier on multiple platforms allows for downgrading the signature algorithm used. For example when a client sends ECDSA P521 as the supported signature algorithm the server previously could respond as ECDSA P256 being the accepted signature algorithm and the connection would continue with using ECDSA P256, if the client supports ECDSA P256.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2025-11934 wolfssl
- Ubuntu UBUNTU-CVE-2025-11934 wolfssl
References
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- patch github.com
- web wolfssl.com