USN-2883-1: OpenSSL vulnerability

28 January 2016

openssl vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 15.10


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

Software Description

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


Antonio Sanso discovered that OpenSSL reused the same private DH exponent for the life of a server process when configured with a X9.42 style parameter file. This could allow a remote attacker to possibly discover the server’s private DH exponent when being used with non-safe primes.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 15.10
libssl1.0.0 - 1.0.2d-0ubuntu1.3

To update your system, please follow these instructions:

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