USN-6851-1: Netplan vulnerabilities

Severity

Medium

Vendor

Canonical Ubuntu

Description

Andreas Hasenack discovered that netplan incorrectly handled the permissions for netdev files containing wireguard configuration. An attacker could use this to obtain wireguard secret keys. It was discovered that netplan configuration could be manipulated into injecting arbitrary commands while setting up network interfaces. An attacker could use this to execute arbitrary commands or escalate privileges. Update Instructions: Run `sudo pro fix USN-6851-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libnetplan-dev – 0.104-0ubuntu2~20.04.5 libnetplan0 – 0.104-0ubuntu2~20.04.5 netplan.io – 0.104-0ubuntu2~20.04.5 No subscription required

CVEs contained in this USN include: CVE-2022-4968.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• cflinuxfs4
  • All versions prior to 1.99.0
• Jammy Stemcells
  • 1.x versions prior to 1.486
  • All other stemcells not listed.
• CF Deployment
  • All versions with Jammy Stemcells prior to 1.486

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below.

The Cloud Foundry project recommends upgrading the following releases:

• cflinuxfs4
  • Upgrade all versions to 1.99.0 or greater
• Jammy Stemcells
  • Upgrade 1.x versions to 1.486 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• CF Deployment
  • For all versions, upgrade Jammy Stemcells to 1.486 or greater

History

2024-07-25: Initial vulnerability report published.