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.
Metrics
Affected Vendors & Products
References
History
Wed, 03 Dec 2025 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Apple
Apple macos Linux Linux linux Kernel |
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| CPEs | cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
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| Vendors & Products |
Apple
Apple macos Linux Linux linux Kernel |
|
| Metrics |
cvssV3_1
|
Mon, 24 Nov 2025 18:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 24 Nov 2025 09:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Wolfssl
Wolfssl wolfssl |
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| Vendors & Products |
Wolfssl
Wolfssl wolfssl |
Fri, 21 Nov 2025 22:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Improper Validation of Signature Algorithm Used in TLS 1.3 CertificateVerify | |
| Weaknesses | CWE-20 | |
| References |
| |
| Metrics |
cvssV4_0
|
Status: PUBLISHED
Assigner: wolfSSL
Published: 2025-11-21T22:12:37.868Z
Updated: 2025-11-24T18:00:04.527Z
Reserved: 2025-10-17T22:20:27.618Z
Link: CVE-2025-11934
Updated: 2025-11-24T16:23:07.767Z
Status : Analyzed
Published: 2025-11-21T23:15:44.540
Modified: 2025-12-03T18:47:17.287
Link: CVE-2025-11934
No data.