PT-2025-47811 · Wolfssl+1 · Wolfssl+1

Published 2025-11-21 · Updated 2025-12-16 · CVE-2025-11934

Positive Technologies (AI Summary)

CVSS v3.1

2.7

Low

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions wolfSSL versions 5.8.2 and earlier

Description A flaw exists in the TLS 1.3 CertificateVerify signature algorithm negotiation within wolfSSL. This issue allows for a downgrade in the signature algorithm used during the TLS handshake. Specifically, if a client supports multiple signature algorithms, such as ECDSA P521 and ECDSA P256, the server could potentially negotiate a less secure algorithm (e.g., ECDSA P256) even if the client offered a stronger one (e.g., ECDSA P521). This occurs due to improper input validation during the signature algorithm selection process.

Recommendations Update wolfSSL to a version later than 5.8.2.

Exploit

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2025-11934

Affected Products

Debian

Wolfssl

References · 14

• 🔥 https://github.com/wolfSSL/wolfssl/pull/9113 · Exploit
• https://cve.org/CVERecord?id=CVE-2025-11934 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-11934 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2025-11934 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-11934 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-11934 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-11934 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-11934 · Vendor Advisory
• https://github.com/wolfSSL/wolfssl · Note
• https://t.me/msrcreports/2523 · Telegram Post
• https://t.me/msrcreports/2591 · Telegram Post
• https://twitter.com/kernyx64/status/1999166072453275657 · Twitter Post
• https://twitter.com/CVEnew/status/1991999023159611855 · Twitter Post
• https://t.me/CVEtracker/37974 · Telegram Post