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USN-3628-1: OpenSSL vulnerability

19 April 2018

OpenSSL could allow access to sensitve information.



  • 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
Ubuntu 16.04
Ubuntu 14.04

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


Related notices

  • USN-3628-2: openssl, libssl1.0.0
  • USN-3692-1: libssl1.1-udeb, openssl, libssl1.0-dev, libcrypto1.1-udeb, libcrypto1.0.0-udeb, openssl1.0, libssl-doc, libssl1.0.0, libssl-dev, libssl1.0.0-udeb, libssl1.1
  • USN-3692-2: openssl, libssl1.0.0