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Ubuntu Security Notice USN-6560-3
September 16, 2024

openssh vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

OpenSSH could be made to crash or run programs as your login
if it received a specially crafted input.

Software Description:
- openssh: secure shell (SSH) for secure access to remote machines

Details:

USN-6560-2 fixed a vulnerability in OpenSSH. This update provides
the corresponding update for Ubuntu 16.04 LTS.


Original advisory details:

 It was discovered that OpenSSH incorrectly handled user names or host
 names with shell metacharacters. An attacker could possibly use this
 issue to perform OS command injection.

Update instructions:

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

Ubuntu 16.04 LTS
  openssh-client                  1:7.2p2-4ubuntu2.10+esm6
                                  Available with Ubuntu Pro
  openssh-server                  1:7.2p2-4ubuntu2.10+esm6
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-6560-3
  https://ubuntu.com/security/notices/USN-6560-2
  https://ubuntu.com/security/notices/USN-6560-1
  CVE-2023-51385