USN-5342-1: Python vulnerabilities | Cloud Foundry

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 16.04
• Canonical Ubuntu 18.04

Description

David Schwörer discovered that Python incorrectly handled certain inputs. An attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 18.04 LTS. (CVE-2021-3426) It was discovered that Python incorrectly handled certain FTP requests. An attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM, and Ubuntu 18.04 LTS. (CVE-2021-4189) It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. (CVE-2022-0391)

CVEs contained in this USN include: CVE-2021-3426, CVE-2021-4189, CVE-2022-0391.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Bionic Stemcells
  • 1.x versions prior to 1.76
  • All other stemcells not listed.
• cflinuxfs3
  • All versions prior to 0.279.0
• CF Deployment
  • All versions prior to 20.0.0, or later versions with Bionic Stemcells prior to 1.76 or Xenial Stemcells prior to 621.236

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 1.76 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• cflinuxfs3
  • Upgrade all versions to 0.279.0 or greater
• CF Deployment
  • Upgrade all versions to 20.0.0 or greater, upgrade Bionic Stemcells to 1.76 or greater, and upgrade Xenial Stemcells to 621.236 or greater

References

• USN Notice
• CVE-2021-3426
• CVE-2021-4189
• CVE-2022-0391

History

2022-05-23: Initial vulnerability report published.