CVE-2025-32989
Severity CVSS v4.0:
Pending analysis
Type:
CWE-295
Improper Certificate Validation
Publication date:
10/07/2025
Last modified:
10/07/2025
Description
A heap-buffer-overread vulnerability was found in GnuTLS in how it handles the Certificate Transparency (CT) Signed Certificate Timestamp (SCT) extension during X.509 certificate parsing. This flaw allows a malicious user to create a certificate containing a malformed SCT extension (OID 1.3.6.1.4.1.11129.2.4.2) that contains sensitive data. This issue leads to the exposure of confidential information when GnuTLS verifies certificates from certain websites when the certificate (SCT) is not checked correctly.
Impact
Base Score 3.x
5.30
Severity 3.x
MEDIUM