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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.
Publish Date : 2020-06-04 Last Update Date : 2020-06-19
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- CVSS Scores & Vulnerability Types

CVSS Score
5.8
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 327

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2020:2637: gnutls security update (Important) oval:com.redhat.rhsa:def:20202637 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2020-13777

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 19.10 * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 20.04 * * * Version Details Vulnerabilities
3 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
4 OS Fedoraproject Fedora 32 * * * Version Details Vulnerabilities
5 Application GNU Gnutls * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 2
Debian Debian Linux 1
Fedoraproject Fedora 1
GNU Gnutls 1

- References For CVE-2020-13777

https://gnutls.org/security-new.html#GNUTLS-SA-2020-06-03 CONFIRM
https://www.debian.org/security/2020/dsa-4697
DEBIAN DSA-4697
https://lists.fedoraproject.org/archives/list/[email protected]/message/VMB3UGI5H5RCFRU6OGRPMNUCNLJGEN7Y/
FEDORA FEDORA-2020-0cce3578e2
https://security.gentoo.org/glsa/202006-01
GENTOO GLSA-202006-01
https://usn.ubuntu.com/4384-1/
UBUNTU USN-4384-1
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00015.html
SUSE openSUSE-SU-2020:0790
https://lists.fedoraproject.org/archives/list/[email protected]/message/6RTXZOXC4MHTFE2HKY6IAZMF2WHD2WMV/
FEDORA FEDORA-2020-4f78f122a3
https://lists.fedoraproject.org/archives/list/[email protected]/message/6C4DHUKV6M6SJ5CV6KVHZNHNF7HCUE5P/
FEDORA FEDORA-2020-76b705bb63
https://lists.fedoraproject.org/archives/list/[email protected]/message/RRQBFK3UZ7SV76IYDTS4PS6ABS2DSJHK/
FEDORA FEDORA-2020-ea11cb5ccc
https://security.netapp.com/advisory/ntap-20200619-0004/ CONFIRM

- Metasploit Modules Related To CVE-2020-13777

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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