Ubuntu Security Notice USN-6859-1

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Ubuntu Security Notice USN-6859-1
July 01, 2024

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

– Ubuntu 24.04 LTS
– Ubuntu 23.10
– Ubuntu 22.04 LTS

Summary:

OpenSSH could be made to bypass authentication and remotely
access systems without proper credentials.

Software Description:
– openssh: secure shell (SSH) for secure access to remote machines

Details:

It was discovered that OpenSSH incorrectly handled signal management. A
remote attacker could use this issue to bypass authentication and remotely
access systems without proper credentials.

Update instructions:

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

Ubuntu 24.04 LTS
openssh-client 1:9.6p1-3ubuntu13.3
openssh-server 1:9.6p1-3ubuntu13.3

Ubuntu 23.10
openssh-client 1:9.3p1-1ubuntu3.6
openssh-server 1:9.3p1-1ubuntu3.6

Ubuntu 22.04 LTS
openssh-client 1:8.9p1-3ubuntu0.10
openssh-server 1:8.9p1-3ubuntu0.10

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-6859-1
CVE-2024-6387

Package Information:
https://launchpad.net/ubuntu/+source/openssh/1:9.6p1-3ubuntu13.3
https://launchpad.net/ubuntu/+source/openssh/1:9.3p1-1ubuntu3.6
https://launchpad.net/ubuntu/+source/openssh/1:8.9p1-3ubuntu0.10