USN-5673-1: unzip vulnerabilities | Cloud Foundry

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

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

Description

It was discovered that unzip did not properly handle unicode strings under certain circumstances. If a user were tricked into opening a specially crafted zip file, an attacker could possibly use this issue to cause unzip to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-4217) It was discovered that unzip did not properly perform bounds checking while converting wide strings to local strings. If a user were tricked into opening a specially crafted zip file, an attacker could possibly use this issue to cause unzip to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2022-0529, CVE-2022-0530) Update Instructions: Run sudo pro fix USN-5673-1 to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: unzip – 6.0-20ubuntu1.1+esm1 Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

CVEs contained in this USN include: CVE-2021-4217, CVE-2022-0529, CVE-2022-0530.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Bionic Stemcells
  • 1.x versions prior to 1.122
  • All other stemcells not listed.
• cflinuxfs3
  • All versions prior to 0.328.0
• Jammy Stemcells
  • 1.x versions prior to 1.30
  • All other stemcells not listed.
• CF Deployment
  • All versions prior to 23.0.0, or later versions with Jammy Stemcells prior to 1.30, Bionic Stemcells prior to 1.122, or Xenial Stemcells prior to 621.304

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 1.122 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• cflinuxfs3
  • Upgrade all versions to 0.328.0 or greater
• Jammy Stemcells
  • Upgrade 1.x versions to 1.30 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• CF Deployment
  • Upgrade all versions to 23.0.0 or greater, upgrade Jammy Stemcells to 1.30 or greater, upgrade Bionic Stemcells to 1.122 or greater, and upgrade Xenial Stemcells to 621.304 or greater

References

• USN Notice
• CVE-2021-4217
• CVE-2022-0529
• CVE-2022-0530

History

2022-12-07: Initial vulnerability report published.