CVE-2020-13777 - Canonical Ubuntu Linux, Gnu Gnutls and Debian Debian Linux
Critical 7.4
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.
Affected software
Canonical Ubuntu Linux
Gnu Gnutls
Debian Debian Linux
Fedoraproject Fedora
Reference links
- https://gnutls.org/security-new.html#GNUTLS-SA-2020-06-03
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VMB3UGI5H5RCFRU6OGRPMNUCNLJGEN7Y/
- https://security.gentoo.org/glsa/202006-01
- https://usn.ubuntu.com/4384-1/
- https://www.debian.org/security/2020/dsa-4697