Critical OpenSSH Timing Vulnerability Discovery in Ubuntu 6887-1 Advisory
Summary
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