USN-4764-1: GLib vulnerability | Cloud Foundry

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 16.04
• Canonical Ubuntu 18.04

Description

It was discovered that GLib incorrectly handled certain symlinks when replacing files. If a user or automated system were tricked into extracting a specially crafted file with File Roller, a remote attacker could possibly create files outside of the intended directory.

CVEs contained in this USN include: CVE-2021-28153.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• cflinuxfs3
  • All versions prior to 0.230.0
• Xenial Stemcells
  • 456.x versions prior to 456.152
  • 621.x versions prior to 621.115
  • All other stemcells not listed.
• CF Deployment
  • All versions prior to 16.11.0

Mitigation

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

• cflinuxfs3
  • Upgrade all versions to 0.230.0 or greater
• Xenial Stemcells
  • Upgrade 456.x versions to 456.152 or greater
  • Upgrade 621.x versions to 621.115 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• CF Deployment
  • Upgrade all versions to 16.11.0 or greater

References

• USN Notice
• CVE-2021-28153

History

2021-04-14: Initial vulnerability report published.