USN-4990-1: Nettle vulnerabilities | Cloud Foundry

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 18.04

Description

It was discovered that Nettle incorrectly handled RSA decryption. A remote attacker could possibly use this issue to cause Nettle to crash, resulting in a denial of service. (CVE-2021-3580)

It was discovered that Nettle incorrectly handled certain padding oracles. A remote attacker could possibly use this issue to perform a variant of the Bleichenbacher attack. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-16869)

CVEs contained in this USN include: CVE-2018-16869, CVE-2021-3580.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Bionic Stemcells
  • 1.x versions prior to 1.13
  • All other stemcells not listed.
• cflinuxfs3
  • All versions prior to 0.244.0
• CF Deployment
  • All versions prior to 16.16.0

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 1.13 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• cflinuxfs3
  • Upgrade all versions to 0.244.0 or greater
• CF Deployment
  • Upgrade all versions to 16.16.0 or greater

References

• USN Notice
• CVE-2018-16869
• CVE-2021-3580

History

2021-07-08: Initial vulnerability report published.