wolfSSL up to 5.8.2 CertificateVerify Signature Algorithm Negotiation signature verification

CVSS Meta Temp Score
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CTI Interest Score
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2.6$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in wolfSSL up to 5.8.2. This issue affects some unknown processing of the component CertificateVerify Signature Algorithm Negotiation. The manipulation leads to signature verification. This vulnerability is listed as CVE-2025-11934. The attack may be initiated remotely. There is no available exploit. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in wolfSSL up to 5.8.2 and classified as problematic. This issue affects some unknown functionality of the component CertificateVerify Signature Algorithm Negotiation. The manipulation with an unknown input leads to a signature verification vulnerability. Using CWE to declare the problem leads to CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. Impacted is integrity. The summary by CVE is:

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.

The weakness was presented by Jaehun Lee. The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-11934 since 10/18/2025. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are necessary for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 276567 (Linux Distros Unpatched Vulnerability : CVE-2025-11934), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (276567). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 2.7
VulDB Meta Temp Score: 2.7

VulDB Base Score: 2.7
VulDB Temp Score: 2.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 2.7
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 276567
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-11934

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: github.com

Timelineinfo

10/18/2025 CVE reserved
11/22/2025 +35 days Advisory disclosed
11/22/2025 +0 days VulDB entry created
12/04/2025 +12 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Researcher: Jaehun Lee
Status: Confirmed

CVE: CVE-2025-11934 (🔒)
GCVE (CVE): GCVE-0-2025-11934
GCVE (VulDB): GCVE-100-333293

Entryinfo

Created: 11/22/2025 08:46
Updated: 12/04/2025 04:26
Changes: 11/22/2025 08:46 (66), 11/23/2025 07:40 (2), 12/04/2025 04:26 (9)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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