Vulnerability Details CVE-2020-13777
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 68.8%
CVSS Severity
CVSS v3 Score 7.4
CVSS v2 Score 5.8
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://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
- 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://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
Products affected by CVE-2020-13777
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cpe:2.3:a:gnu:gnutls:3.6.0
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cpe:2.3:a:gnu:gnutls:3.6.1
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cpe:2.3:a:gnu:gnutls:3.6.10
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cpe:2.3:a:gnu:gnutls:3.6.11
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cpe:2.3:a:gnu:gnutls:3.6.12
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cpe:2.3:a:gnu:gnutls:3.6.13
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cpe:2.3:a:gnu:gnutls:3.6.2
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cpe:2.3:a:gnu:gnutls:3.6.3
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cpe:2.3:a:gnu:gnutls:3.6.4
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cpe:2.3:a:gnu:gnutls:3.6.5
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cpe:2.3:a:gnu:gnutls:3.6.6
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cpe:2.3:a:gnu:gnutls:3.6.7
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cpe:2.3:a:gnu:gnutls:3.6.8
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cpe:2.3:a:gnu:gnutls:3.6.8-11.el8_2
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cpe:2.3:a:gnu:gnutls:3.6.9
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cpe:2.3:o:canonical:ubuntu_linux:19.10
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cpe:2.3:o:canonical:ubuntu_linux:20.04
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cpe:2.3:o:debian:debian_linux:10.0
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cpe:2.3:o:fedoraproject:fedora:31
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cpe:2.3:o:fedoraproject:fedora:32