How to Disable Weak Key Exchange Algorithms in OpenSSH (Doc ID 2661086.1)

Last updated on MARCH 29, 2023

Applies to:

Goal

The security scan shows a week Key Key Exchange Algorithm which needs to be removed from ssh configuration:

SSH Server Supports Weak Key Exchange Algorithms
CVSS Score: 4.30
Description
The server supports one or more weak key exchange algorithms. It is highly adviseable to remove weak key exchange algorithm support
from SSH configuration files on hosts to prevent them from being used to establish connections.
Proof
Port: 22
Service: SSH
Running SSH service
Insecure key exchange algorithms in use: diffie-hellman-group14-sha1
Vulnerability Solution
Disable weak Key Exchange Algorithms

Solution

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