1. Ubuntu Security Notices
  2. USN-4762-1

USN-4762-1: OpenSSH vulnerability

Publication date

10 March 2021

Overview

OpenSSH could be made to crash or run programs if it received specially crafted network traffic.

Releases

Packages

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

Details

It was discovered that the OpenSSH ssh-agent incorrectly handled memory. A
remote attacker able to connect to the agent could use this issue to cause
it to crash, resulting in a denial of service, or possibly execute
arbitrary code.

It was discovered that the OpenSSH ssh-agent incorrectly handled memory. A
remote attacker able to connect to the agent could use this issue to cause
it to crash, resulting in a denial of service, or possibly execute
arbitrary code.

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
20.10 groovy openssh-client –  1:8.3p1-1ubuntu0.1
20.04 focal openssh-client –  1:8.2p1-4ubuntu0.2

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References

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