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Bug#1121199: wolfssl: CVE-2025-11934

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Source: wolfssl
Version: 5.8.2-1.2
Severity: important
Tags: security upstream
Forwarded: https://github.com/wolfSSL/wolfssl/pull/9113
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for wolfssl.

CVE-2025-11934[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2025-11934
    https://www.cve.org/CVERecord?id=CVE-2025-11934
[1] https://github.com/wolfSSL/wolfssl/pull/9113
[2] https://github.com/wolfSSL/wolfssl/commit/2810656242f18b813c1fbea117f68ac19193381f

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore

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Bug#1121199: wolfssl: CVE-2025-11934 Salvatore Bonaccorso <carnil@debian.org> - 2025-11-22 16:40 +0100

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