USN-2863-1: OpenSSL vulnerability

07 January 2016

OpenSSL could be made to expose sensitive information over the network.



  • openssl - Secure Socket Layer (SSL) cryptographic library and tools


Karthikeyan Bhargavan and Gaetan Leurent discovered that OpenSSL
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 versions:

Ubuntu 12.04

After a standard system update you need to reboot your computer to make
all the necessary changes.


Related notices

  • USN-2864-1: libnss3, nss
  • USN-2865-1: gnutls26, libgnutls-openssl27, libgnutls-deb0-28, libgnutlsxx28, gnutls28, libgnutls26, libgnutlsxx27
  • USN-2866-1: firefox
  • USN-2884-1: openjdk-7, openjdk-7-jre-zero, icedtea-7-jre-jamvm, openjdk-7-jre-lib, openjdk-7-jre, openjdk-7-jre-headless
  • USN-2904-1: thunderbird