Vulnerabilities > CVE-2020-24659 - NULL Pointer Dereference vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
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.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html
- https://gitlab.com/gnutls/gnutls/-/issues/1071
- https://gitlab.com/gnutls/gnutls/-/issues/1071
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/
- https://security.gentoo.org/glsa/202009-01
- https://security.gentoo.org/glsa/202009-01
- https://security.netapp.com/advisory/ntap-20200911-0006/
- https://security.netapp.com/advisory/ntap-20200911-0006/
- https://usn.ubuntu.com/4491-1/
- https://usn.ubuntu.com/4491-1/
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04