Checking OpenSSH Version

Overview

To check the version of OpenSSH installed on your system and determine the security patches applied, you can use the following command-line tools:

Step 1: Check OpenSSH Version First, check your current version of OpenSSH by running:

ssh -V

This command will display the version of OpenSSH currently running on your system.

Step 2: Check Installed Package Version

To see the specific package version installed, use:

dpkg -l | grep openssh-server

This will list the OpenSSH server package version installed on your Ubuntu system.

Step 3: Determine Patch Level

To understand the patches applied to your version of OpenSSH, you need to reference the Ubuntu security notices:

1. Visit the Ubuntu Security Notices webpage: Navigate to Ubuntu Security Notices.

2. Search for OpenSSH: Enter "OpenSSH" into the search field to find notices related to OpenSSH packages.

3. Review applicable notices: Identify notices that correspond to your version of OpenSSH and review the patches that have been applied.

Using Ubuntu CVE Tracker

Ubuntu also maintains a CVE Tracker that provides detailed information about the status of CVEs in Ubuntu packages, including whether they are fixed and in which package version.

• Access the CVE Tracker: Go to the Ubuntu CVE Tracker.

• Search for a specific CVE: Enter the CVE number you are concerned about to see its status in Ubuntu.

• Check patch status: The tracker will indicate whether the CVE has been addressed in your version of Ubuntu and if your current package version includes the fix.