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.
Problem types
Improper Certificate Validation
Product status
Any version before 3.8.10
0:3.8.9-9.el10_0.14 (rpm) before *
0:3.8.3-6.el9_6.2 (rpm) before *
0:3.8.3-6.el9_6.2 (rpm) before *
0:3.7.6-21.el9_2.4 (rpm) before *
0:3.8.3-4.el9_4.4 (rpm) before *
sha256:4d2f9dc5b2b33ee1c77bbfabcbbb9f4d94d343b04c4de2e4f8b3b81a1f0fd2fe (rpm) before *
sha256:435ba9959b793d46a63a74c343bb8c3ff68350496afec12cc5e894dfc40b7648 (rpm) before *
3.8.12-1.1.hum1 (rpm) before *
sha256:4ca38b33efec0d2dd17a8fd822a7c18281810676ceabb0c1db90953cb91cd5ea (rpm) before *
Timeline
| 2025-04-15: | Reported to Red Hat. |
| 2025-07-10: | Made public. |
References
www.openwall.com/lists/oss-security/2025/07/11/3
cert-portal.siemens.com/productcert/html/ssa-082556.html
access.redhat.com/errata/RHSA-2025:16115 (RHSA-2025:16115)
access.redhat.com/errata/RHSA-2025:16116 (RHSA-2025:16116)
access.redhat.com/errata/RHSA-2025:17181 (RHSA-2025:17181)
access.redhat.com/errata/RHSA-2025:17348 (RHSA-2025:17348)
access.redhat.com/errata/RHSA-2025:17361 (RHSA-2025:17361)
access.redhat.com/errata/RHSA-2025:19088 (RHSA-2025:19088)
access.redhat.com/errata/RHSA-2025:22529 (RHSA-2025:22529)
access.redhat.com/errata/RHSA-2026:7477 (RHSA-2026:7477)
access.redhat.com/security/cve/CVE-2025-32989
bugzilla.redhat.com/show_bug.cgi?id=2359621 (RHBZ#2359621)
lists.gnupg.org/pipermail/gnutls-help/2025-July/004883.html