CVE-2020-24659
Published: August 31, 2023Last modified: August 31, 2023
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | gnutls | Not affected (3.7.8-r3) |
| Stream | gnutls | Not affected (3.8.1-r0) |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html
- 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/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N/
- https://security.gentoo.org/glsa/202009-01
- https://security.netapp.com/advisory/ntap-20200911-0006/
- https://usn.ubuntu.com/4491-1/
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-09-04