CVE-2020-13777
Published: August 31, 2023Last modified: August 31, 2023
Description
GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3). The earliest affected version is 3.6.4 (2018-09-24) because of an error in a 2018-09-18 commit. Until the first key rotation, the TLS server always uses wrong data in place of an encryption key derived from an application.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.4 |
| Attack Vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | NONE |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
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/2020-06/msg00015.html
- https://gnutls.org/security-new.html#GNUTLS-SA-2020-06-03
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6C4DHUKV6M6SJ5CV6KVHZNHNF7HCUE5P/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6RTXZOXC4MHTFE2HKY6IAZMF2WHD2WMV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RRQBFK3UZ7SV76IYDTS4PS6ABS2DSJHK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VMB3UGI5H5RCFRU6OGRPMNUCNLJGEN7Y/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/6C4DHUKV6M6SJ5CV6KVHZNHNF7HCUE5P/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/6RTXZOXC4MHTFE2HKY6IAZMF2WHD2WMV/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/RRQBFK3UZ7SV76IYDTS4PS6ABS2DSJHK/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/VMB3UGI5H5RCFRU6OGRPMNUCNLJGEN7Y/
- https://security.gentoo.org/glsa/202006-01
- https://security.netapp.com/advisory/ntap-20200619-0004/
- https://usn.ubuntu.com/4384-1/
- https://www.debian.org/security/2020/dsa-4697