Narrowed list of allowed SSH ciphers

Details

Detail name Value
Changelog Number 19211
Type Improvement
Status Resolved
Fix Versions Exasol 8.25.0
Resolution Date 2024-02-15

Improvement

The list of allowed Ciphers to SSH into COS has been narrowed to:

  • aes128-ctr
  • aes192-ctr
  • aes256-ctr
  • aes128-gcm@openssh.com
  • aes256-gcm@openssh.com

This mitigates/fixes/avoids the recently published terrapin attack (https://terrapin-attack.com/)

Changed behavior

To ssh into COS one may only use the following Ciphers: aes128-ctr, aes192-ctr, aes256-ctr,aes128-gcm@openssh.com, aes256-gcm@openssh.com