Ubuntu Security Notice USN-2865-1
8th January, 2016
gnutls26, gnutls28 vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 15.04
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary
GnuTLS could be made to expose sensitive information over the network.
Software description
- gnutls26
– GNU TLS library - gnutls28
– GNU TLS library
Details
Karthikeyan Bhargavan and Gaetan Leurent discovered that GnuTLS incorrectly
allowed MD5 to be used for TLS 1.2 connections. If a remote attacker were
able to perform a man-in-the-middle attack, this flaw could be exploited to
view sensitive information.
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 15.04:
-
libgnutls-openssl27
3.3.8-3ubuntu3.2
-
libgnutls-deb0-28
3.3.8-3ubuntu3.2
-
libgnutlsxx28
3.3.8-3ubuntu3.2
- Ubuntu 14.04 LTS:
-
libgnutlsxx27
2.12.23-12ubuntu2.4
-
libgnutls-openssl27
2.12.23-12ubuntu2.4
-
libgnutls26
2.12.23-12ubuntu2.4
- Ubuntu 12.04 LTS:
-
libgnutlsxx27
2.12.14-5ubuntu3.11
-
libgnutls-openssl27
2.12.14-5ubuntu3.11
-
libgnutls26
2.12.14-5ubuntu3.11
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
Source: ubuntu-usn
