CVEvulnerability
CVE-2020-24659
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-09-04
- Last modified
- 2026-10-14
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-476, CWE-787
Description
An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.
Affected configurations
• gnu gnutls (< 3.6.15)
• fedoraproject fedora 32
• fedoraproject fedora 33
• opensuse leap 15.1
• opensuse leap 15.2
• canonical ubuntu linux 20.04
Related
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html Mailing List, Third Party Advisory
- https://gitlab.com/gnutls/gnutls/-/issues/1071 Exploit, Issue Tracking, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/ lists.fedoraproject.org
- https://security.gentoo.org/glsa/202009-01 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200911-0006/ Third Party Advisory
- https://usn.ubuntu.com/4491-1/ Third Party Advisory
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04 Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html Mailing List, Third Party Advisory
- https://gitlab.com/gnutls/gnutls/-/issues/1071 Exploit, Issue Tracking, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/ lists.fedoraproject.org
- https://security.gentoo.org/glsa/202009-01 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200911-0006/ Third Party Advisory
- https://usn.ubuntu.com/4491-1/ Third Party Advisory
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04 Vendor Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html cert-portal.siemens.com