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AUSCERT External Security Bulletin Redistribution
ESB-2020.1974
FreeBSD VuXML: Documenting security issues in FreeBSD and
the FreeBSD Ports Collection
5 June 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: GnuTLS
Publisher: FreeBSD
Operating System: FreeBSD
Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-13777
Original Bulletin:
https://www.vuxml.org/freebsd/ef5b4f5f-a658-11ea-80d7-001cc0382b2f.html
Comment: This advisory references vulnerabilities in products which run on
platforms other than FreeBSD. It is recommended that administrators
running GnuTLS check for an updated version of the software for
their operating system.
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FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports
Collection
GnuTLS -- flaw in TLS session ticket key construction
Affected packages
gnutls < 3.6.14
Details
VuXML ID ef5b4f5f-a658-11ea-80d7-001cc0382b2f
Discovery 2020-06-03
Entry 2020-06-04
The GnuTLS project reports:
It was found that GnuTLS 3.6.4 introduced a regression in the TLS protocol
implementation. This caused the TLS server to not securely construct a
session ticket encryption key considering the application supplied secret,
allowing a MitM attacker to bypass authentication in TLS 1.3 and recover
previous conversations in TLS 1.2.
[source]
References
CVE Name CVE-2020-13777
URL https://gnutls.org/security-new.html#GNUTLS-SA-2020-06-03
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Copyright 2003-2005 Jacques Vidrine and contributors.
Please see the source of this document for full copyright information.
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