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USN-5328-2: OpenSSL vulnerability

15 March 2022

OpenSSL could be made to stop responding if it opened a specially crafted certificate.



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


USN-5328-1 fixed a vulnerability in OpenSSL. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Tavis Ormandy discovered that OpenSSL incorrectly parsed certain
certificates. A remote attacker could possibly use this issue to cause
OpenSSH to stop responding, resulting in a denial of service.

Update instructions

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

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-5328-1: libssl1.0-dev, libssl1.1, openssl1.0, libssl-dev, libssl1.0.0, openssl, libssl-doc