All Vulnerability Reports

USN-6279-1: OpenSSH update


Severity

Unknown

Vendor

VMware Tanzu

Versions Affected

  • Canonical Ubuntu 16.04
  • Canonical Ubuntu 18.04
  • Canonical Ubuntu 22.04

Description

It was discovered that OpenSSH has an observable discrepancy leading to an information leak in the algorithm negotiation. This update mitigates the issue by tweaking the client hostkey preference ordering algorithm to prefer the default ordering if the user has a key that matches the best-preference default algorithm. Update Instructions: Run `sudo pro fix USN-6279-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: openssh-server - 1:7.6p1-4ubuntu0.7+esm2 ssh-askpass-gnome - 1:7.6p1-4ubuntu0.7+esm2 openssh-client - 1:7.6p1-4ubuntu0.7+esm2 ssh - 1:7.6p1-4ubuntu0.7+esm2 openssh-sftp-server - 1:7.6p1-4ubuntu0.7+esm2 Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Affected VMware Products and Versions

Severity is unknown unless otherwise noted.

  • Platform Automation Toolkit
    • 4.4.x versions prior to 4.4.32
    • 5.0.x versions prior to 5.0.25
    • 5.1.x versions prior to 5.1.2
  • Isolation Segment
    • 2.11.x versions prior to 2.11.38, or later versions with Xenial Stemcells prior to 621.644
    • 2.13.x versions prior to 2.13.23, or later versions with Xenial Stemcells prior to 621.644
    • 3.0.x versions prior to 3.0.16
    • 4.0.x versions prior to 4.0.8+LTS-T
  • Operations Manager
    • 2.10.x versions prior to 2.10.61
  • VMware Tanzu Application Service for VMs
    • 2.11.x versions prior to 2.11.44, or later versions with Xenial Stemcells prior to 621.644
    • 2.13.x versions prior to 2.13.26, or later versions with Xenial Stemcells prior to 621.644
    • 3.0.x versions prior to 3.0.16
    • 4.0.x versions prior to 4.0.8+LTS-T

Mitigation

Users of affected products are strongly encouraged to follow the mitigation below. On the Tanzu Network product page for each release, check the Depends On section and/or Release Notes for this information. Releases that have fixed this issue include:

  • Platform Automation Toolkit
    • 4.4.32
    • 5.0.25
    • 5.1.2
  • Isolation Segment
    • 2.11.38, and upgrade Xenial Stemcells to 621.644 or greater
    • 2.13.23, and upgrade Xenial Stemcells to 621.644 or greater
    • 3.0.16
    • 4.0.8+LTS-T
  • Operations Manager
    • 2.10.61
  • VMware Tanzu Application Service for VMs
    • 2.11.44, and upgrade Xenial Stemcells to 621.644 or greater
    • 2.13.26, and upgrade Xenial Stemcells to 621.644 or greater
    • 3.0.16
    • 4.0.8+LTS-T

References

History

2023-10-18: Initial vulnerability report published.