Cloud Foundry Logo
blog single gear
Security Advisory

USN-6588-1: PAM vulnerability

USN-6588-1: PAM vulnerability




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 22.04


Matthias Gerstner discovered that the PAM pam_namespace module incorrectly handled special files when performing directory checks. A local attacker could possibly use this issue to cause PAM to stop responding, resulting in a denial of service. Update Instructions: Run `sudo pro fix USN-6588-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libpam-runtime – 1.3.1-5ubuntu4.7 libpam0g-dev – 1.3.1-5ubuntu4.7 libpam-modules – 1.3.1-5ubuntu4.7 libpam-modules-bin – 1.3.1-5ubuntu4.7 libpam-doc – 1.3.1-5ubuntu4.7 libpam-cracklib – 1.3.1-5ubuntu4.7 libpam0g – 1.3.1-5ubuntu4.7 No subscription required

CVEs contained in this USN include: CVE-2024-22365.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • cflinuxfs4
    • All versions prior to 1.66.0
  • Jammy Stemcells
    • 1.x versions prior to 1.351
    • All other stemcells not listed.
  • CF Deployment
    • All versions with Jammy Stemcells prior to 1.351


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 1.66.0 or greater
  • Jammy Stemcells
    • Upgrade 1.x versions to 1.351 or greater
    • All other stemcells should be upgraded to the latest version available on
  • CF Deployment
    • For all versions, upgrade Jammy Stemcells to 1.351 or greater


2024-02-29: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR