Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

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

Description

It was discovered that systemd did not properly validate the time and accuracy values provided to the format_timespan() function. An attacker could possibly use this issue to cause a buffer overrun, leading to a denial of service attack. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2022-3821) It was discovered that systemd did not properly manage the fs.suid_dumpable kernel configurations. A local attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 22.10. (CVE-2022-4415) It was discovered that systemd did not properly manage a crash with long backtrace data. A local attacker could possibly use this issue to cause a deadlock, leading to a denial of service attack. This issue only affected Ubuntu 22.10. (CVE-2022-45873) Update Instructions: Run sudo pro fix USN-5928-1 to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: systemd-coredump – 229-4ubuntu21.31+esm3 systemd – 229-4ubuntu21.31+esm3 libsystemd0 – 229-4ubuntu21.31+esm3 systemd-container – 229-4ubuntu21.31+esm3 libnss-myhostname – 229-4ubuntu21.31+esm3 libudev1 – 229-4ubuntu21.31+esm3 libsystemd-dev – 229-4ubuntu21.31+esm3 systemd-journal-remote – 229-4ubuntu21.31+esm3 libpam-systemd – 229-4ubuntu21.31+esm3 libudev-dev – 229-4ubuntu21.31+esm3 libnss-mymachines – 229-4ubuntu21.31+esm3 libnss-resolve – 229-4ubuntu21.31+esm3 systemd-sysv – 229-4ubuntu21.31+esm3 udev – 229-4ubuntu21.31+esm3 Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

CVEs contained in this USN include: CVE-2022-3821, CVE-2022-4415, CVE-2022-45873.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Bionic Stemcells
  • 1.x versions prior to 1.188
  • All other stemcells not listed.
• cflinuxfs3
  • All versions prior to 0.357.0
• cflinuxfs4
  • All versions prior to 0.73.0
• Jammy Stemcells
  • v1.x versions prior to 1.95
  • All other stemcells not listed.
• CF Deployment
  • All versions prior to 27.4.0, or later versions with Jammy Stemcells prior to 1.95, Bionic Stemcells prior to 1.188

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 1.188 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• cflinuxfs3
  • Upgrade all versions to 0.357.0 or greater
• cflinuxfs4
  • Upgrade all versions to 0.73.0 or greater
• Jammy Stemcells
  • Upgrade v1.x versions to 1.95 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• CF Deployment
  • Upgrade all versions to 27.4.0 or greater, upgrade Jammy Stemcells to 1.95 or greater, upgrade Bionic Stemcells to 1.188 or greater

References

• USN Notice
• CVE-2022-3821
• CVE-2022-4415
• CVE-2022-45873

History

2023-04-20: Initial vulnerability report published.