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5.3 Medium

CVE-2025-32989 Gnutls: vulnerability in gnutls sct extension parsing

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.

CVSS 3.1 detail

Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitable remotely over the network, without an account and without any user action; the impact on data or service is limited.

Attack vector
Network
Attack complexity
Low
Privileges required
None
Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Affected products and versions

Product Affected versions Fixed in
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 9 Versions not published
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 9.4 Extended Update Support Versions not published
Red Hat Ceph Storage 7 7 earliest → < 7 7
Red Hat Discovery 2 2.3 earliest → < 2.3.0-1760554384 2.3.0-1760554384
Red Hat Insights proxy 1.5 1.5 earliest → < 1.5.7-1759331989 1.5.7-1759331989
Red Hat Enterprise Linux 6 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Show the 7 other branches
Product Affected versions Fixed in
Red Hat Enterprise Linux 8 Versions not published
Red Hat OpenShift Container Platform 4 Versions not published
Red Hat Hardened Images 3.8 earliest → < 3.8.12-1.1.hum1 3.8.12-1.1.hum1
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.5 → latest No fix stated
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 3.1.5 → latest No fix stated
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.5 → latest No fix stated
Red Hat In-Vehicle Operating System 1 Versions not published

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