USN-4327-1: libssh vulnerability

Publication date

9 April 2020

Overview

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


Packages

  • libssh - A tiny C SSH library

Details

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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
19.10 eoan libssh-4 –  0.9.0-1ubuntu1.4
18.04 bionic libssh-4 –  0.8.0~20170825.94fa1e38-1ubuntu0.6

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