Linux Security
Linux Security
Linux Security

ArchLinux: 202006-2: gnutls: man-in-the-middle

Date 09 Jun 2020
191
Posted By LinuxSecurity Advisories
The package gnutls before version 3.6.14-1 is vulnerable to man-in-the- middle.
Arch Linux Security Advisory ASA-202006-2
=========================================

Severity: High
Date    : 2020-06-06
CVE-ID  : CVE-2020-13777
Package : gnutls
Type    : man-in-the-middle
Remote  : Yes
Link    : https://security.archlinux.org/AVG-1177

Summary
=======

The package gnutls before version 3.6.14-1 is vulnerable to man-in-the-
middle.

Resolution
==========

Upgrade to 3.6.14-1.

# pacman -Syu "gnutls>=3.6.14-1"

The problem has been fixed upstream in version 3.6.14.

Workaround
==========

None.

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.

Impact
======

A remote attacker can man-in-the-middle a connection to bypass
authentication in TLS 1.3, and recover previous conversations in TLS
1.2.

References
==========

https://gnutls.org/security-new.html#GNUTLS-SA-2020-06-03
https://gitlab.com/gnutls/gnutls/-/issues/1011
https://gitlab.com/gnutls/gnutls/-/commit/c2646aeee94e71cb15c90a3147cf3b5b0ca158ca?merge_request_iid=1275
https://security.archlinux.org/CVE-2020-13777

Advisories

LinuxSecurity Poll

How frequently do you patch/update your system?

No answer selected. Please try again.
Please select either existing option or enter your own, however not both.
Please select minimum 0 answer(s) and maximum 3 answer(s).
/main-polls/52-how-frequently-do-you-patch-update-your-system?task=poll.vote&format=json
52
radio
[{"id":"179","title":"As soon as patches\/updates are released - I track advisories for my distro(s) diligently","votes":"64","type":"x","order":"1","pct":76.19,"resources":[]},{"id":"180","title":"Every so often, when I think of it","votes":"13","type":"x","order":"2","pct":15.48,"resources":[]},{"id":"181","title":"Hardly ever","votes":"7","type":"x","order":"3","pct":8.33,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350

Please vote first in order to view vote results.

VOTE ON THE POLL PAGE


VIEW MORE POLLS

bottom 200

Please enable / Bitte aktiviere JavaScript!
Veuillez activer / Por favor activa el Javascript![ ? ]

We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.