Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 16.04
• Canonical Ubuntu 18.04

Description

Evgeny Legerov discovered that zlib incorrectly handled memory when performing certain inflate operations. An attacker could use this issue to cause zlib to crash, resulting in a denial of service, or possibly execute arbitrary code. Update Instructions: Run sudo ua fix USN-5570-1 to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libx32z1-dev – 1:1.2.8.dfsg-2ubuntu4.3+esm2 lib64z1 – 1:1.2.8.dfsg-2ubuntu4.3+esm2 libx32z1 – 1:1.2.8.dfsg-2ubuntu4.3+esm2 lib64z1-dev – 1:1.2.8.dfsg-2ubuntu4.3+esm2 lib32z1 – 1:1.2.8.dfsg-2ubuntu4.3+esm2 zlib1g – 1:1.2.8.dfsg-2ubuntu4.3+esm2 lib32z1-dev – 1:1.2.8.dfsg-2ubuntu4.3+esm2 zlib1g-dev – 1:1.2.8.dfsg-2ubuntu4.3+esm2 Available with UA Infra or UA Desktop: https://ubuntu.com/advantage

CVEs contained in this USN include: CVE-2022-37434.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Bionic Stemcells
  • 1.x versions prior to 1.97
  • All other stemcells not listed.
• cflinuxfs3
  • All versions prior to 0.316.0
• CF Deployment
  • All versions

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 1.97 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• cflinuxfs3
  • Upgrade all versions to 0.316.0 or greater
• CF Deployment
  • There are no fixed versions of this product

References

• USN Notice
• CVE-2022-37434

History

2022-08-25: Initial vulnerability report published.