USN-3628-1: OpenSSL vulnerability

19 April 2018

openssl vulnerability

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

  • Ubuntu 17.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


OpenSSL could allow access to sensitve information.

Software Description

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


Alejandro Cabrera Aldaya, Billy Brumley, Cesar Pereida Garcia and Luis Manuel Alvarez Tapia discovered that OpenSSL incorrectly handled RSA key generation. An attacker could possibly use this issue to perform a cache-timing attack and recover private RSA keys.

Update instructions

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

Ubuntu 17.10
libssl1.0.0 - 1.0.2g-1ubuntu13.5
Ubuntu 16.04 LTS
libssl1.0.0 - 1.0.2g-1ubuntu4.12
Ubuntu 14.04 LTS
libssl1.0.0 - 1.0.1f-1ubuntu2.25

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.