This article details how to check the OpenSSH version that is installed on your device, so that you can determine the security vulnerabilities that are addressed in the version. 

Note: Some security vulnerabilities are addressed in more recent versions of OpenSSH. 

• I want to know the OpenSSH version installed on my device so that I can check the security vulnerabilities it addresses. 

• How do I check the OpenSSH version that is installed on my device that is running Junos OS?

To check the version of OpenSSH installed on your device, which is running a particular Junos OS version, execute the  ssh -V command on the shell in Junos OS.

Example

root@router-re0% ssh -V
OpenSSH_6.0, SSH protocols 1.5/2.0, OpenSSL 0.9.8y 5 Feb 2013
SSH release 12.3R4.6 built by builder on 2013-09-13 03:19:31 UTC 

To check the OpenSSH version installed on a device running Junos OS Release 20.4R1-S1.2: 

root@router-re0% ssh -V
OpenSSH_7.5, SSH protocols 1.5/2.0, OpenSSL 1.0.2u  20 Dec 2019
SSH release 20.1R20200807_1419_builder built by builder on 2020-08-07 14:24:58 UTC

2026-02-09: Minor, non-technical changes made for search optimization

2024-08-19: Removed E-series from the product category as it is EOS

2018-08-21: Modified list in Solution section to include Junos OS 15.1X49-D100 and later, and releases 17.3, 17.4, 18.1, and 18.

2019-03-29: Removed list of Junos OS versions.  Left instructions on how to find the version.

2022-07-08: Added example for release 20.4R1-S1.2. Article is still valid and relevant.