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Ubuntu Security Notice USN-6887-1
July 09, 2024
openssh vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 24.04 LTS
Summary:
OpenSSH could be made to expose timing information over the network.
Software Description:
- openssh: secure shell (SSH) for secure access to remote machines
Details:
Philippos Giavridis, Jacky Wei En Kung, Daniel Hugenroth, and Alastair
Beresford discovered that the OpenSSH ObscureKeystrokeTiming feature did
not work as expected. A remote attacker could possibly use this issue to
determine timing information about keystrokes.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 24.04 LTS
   openssh-client                  1:9.6p1-3ubuntu13.4
   openssh-server                  1:9.6p1-3ubuntu13.4
In general, a standard system update will make all the necessary changes.
References:
   https://ubuntu.com/security/notices/USN-6887-1
   CVE-2024-39894
Package Information:
   https://launchpad.net/ubuntu/+source/openssh/1:9.6p1-3ubuntu13.4