USN-7457-1: OpenSSH vulnerability

USN-7457-1: OpenSSH vulnerability
24 April 2025

OpenSSH could allow unintended access to network services.

Releases

• Ubuntu 25.04
• Ubuntu 24.10
• Ubuntu 24.04 LTS
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS

Packages
openssh - secure shell (SSH) for secure access to remote machines

Details
It was discovered that OpenSSH incorrectly handled the DisableForwarding
directive. The directive would fail to disable X11 and agent forwarding,
contrary to documentation and expectations.

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

Ubuntu 25.04

• openssh-client - 1:9.9p1-3ubuntu3.1
• openssh-server - 1:9.9p1-3ubuntu3.1
  Ubuntu 24.10
• openssh-client - 1:9.7p1-7ubuntu4.3
• openssh-server - 1:9.7p1-7ubuntu4.3
  Ubuntu 24.04
• openssh-client - 1:9.6p1-3ubuntu13.11
• openssh-server - 1:9.6p1-3ubuntu13.11
  Ubuntu 22.04
• openssh-client - 1:8.9p1-3ubuntu0.13
• openssh-server - 1:8.9p1-3ubuntu0.13
  Ubuntu 20.04
• openssh-client - 1:8.2p1-4ubuntu0.13
• openssh-server - 1:8.2p1-4ubuntu0.13
  In general, a standard system update will make all the necessary changes.