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USN-4327-1: libssh vulnerability

9 April 2020

libssh could be made to crash if it received specially crafted network traffic.



  • libssh - A tiny C SSH library


Yasheng Yang discovered that libssh incorrectly handled AES-CTR ciphers. A
remote attacker could possibly use this issue to cause libssh to crash,
resulting in a denial of service.

Update instructions

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

Ubuntu 19.10
Ubuntu 18.04

In general, a standard system update will make all the necessary changes.