USN-3809-2: OpenSSH regression

12 August 2021

USN-3809-1 introduced a regression in OpenSSH.

Releases

Packages

  • openssh - secure shell (SSH) for secure access to remote machines

Details

USN-3809-1 fixed vulnerabilities in OpenSSH. The update for CVE-2018-15473
was incomplete and could introduce a regression in certain environments.
This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Robert Swiecki discovered that OpenSSH incorrectly handled certain messages.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.
(CVE-2016-10708)

It was discovered that OpenSSH incorrectly handled certain requests.
An attacker could possibly use this issue to access sensitive information.
(CVE-2018-15473)

Update instructions

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

Ubuntu 18.04

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