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USN-3899-1: OpenSSL vulnerability

27 February 2019

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



  • openssl - Secure Socket Layer (SSL) cryptographic library and tools
  • openssl1.0 - Secure Socket Layer (SSL) cryptographic library and tools


Juraj Somorovsky, Robert Merget, and Nimrod Aviram discovered that certain
applications incorrectly used OpenSSL and could be exposed to a padding
oracle attack. A remote attacker could possibly use this issue to decrypt

Update instructions

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

Ubuntu 18.10
Ubuntu 18.04
Ubuntu 16.04

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


Related notices

  • USN-4376-2: libssl1.0.0, libssl-dev, libssl-doc, libssl1.0.0-udeb, libcrypto1.0.0-udeb, openssl