USN-5745-1: shadow vulnerability

Severity

Low

Vendor

Canonical Ubuntu

Description

Florian Weimer discovered that shadow was not properly copying and removing user directory trees, which could lead to a race condition. A local attacker could possibly use this issue to setup a symlink attack and alter or remove directories without authorization. Update Instructions: Run `sudo pro fix USN-5745-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: passwd – 1:4.2-3.1ubuntu5.5+esm2 login – 1:4.2-3.1ubuntu5.5+esm2 uidmap – 1:4.2-3.1ubuntu5.5+esm2 Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

CVEs contained in this USN include: CVE-2013-4235.

Affected Cloud Foundry Products and Versions

Severity is low unless otherwise noted.

• Bionic Stemcells
  • 1.x versions prior to 1.150
  • All other stemcells not listed.
• cflinuxfs3
  • All versions prior to 0.341.0
• Jammy Stemcells
  • 1.x versions prior to 1.55
  • All other stemcells not listed.
• CF Deployment
  • All versions prior to 24.0.0, or later versions with Jammy Stemcells prior to 1.55, Bionic Stemcells prior to 1.150, or Xenial Stemcells prior to 621.359

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

• Bionic Stemcells
  • Upgrade 1.x versions to 1.150 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• cflinuxfs3
  • Upgrade all versions to 0.341.0 or greater
• Jammy Stemcells
  • Upgrade 1.x versions to 1.55 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• CF Deployment
  • Upgrade all versions to 24.0.0 or greater, upgrade Jammy Stemcells to 1.55 or greater, upgrade Bionic Stemcells to 1.150 or greater, and upgrade Xenial Stemcells to 621.359 or greater

History

2022-12-07: Initial vulnerability report published.