[USN-7457-1] OpenSSH vulnerability

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-7457-1
April 24, 2025

openssh vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.04
- Ubuntu 24.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

OpenSSH could allow unintended access to network services.

Software Description:
- 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 LTS
   openssh-client                  1:9.6p1-3ubuntu13.11
   openssh-server                  1:9.6p1-3ubuntu13.11

Ubuntu 22.04 LTS
   openssh-client                  1:8.9p1-3ubuntu0.13
   openssh-server                  1:8.9p1-3ubuntu0.13

Ubuntu 20.04 LTS
   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.

References:
   https://ubuntu.com/security/notices/USN-7457-1
   CVE-2025-32728

Package Information:
   https://launchpad.net/ubuntu/+source/openssh/1:9.9p1-3ubuntu3.1
   https://launchpad.net/ubuntu/+source/openssh/1:9.7p1-7ubuntu4.3
   https://launchpad.net/ubuntu/+source/openssh/1:9.6p1-3ubuntu13.11
   https://launchpad.net/ubuntu/+source/openssh/1:8.9p1-3ubuntu0.13
   https://launchpad.net/ubuntu/+source/openssh/1:8.2p1-4ubuntu0.13

-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_signature.asc
Type: application/pgp-signature
Size: 840 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/ubuntu-security-announce/attachments/20250424/76567e68/attachment-0001.sig>