Severity

medium

Vendor

VMware Tanzu

Versions Affected

• Canonical Ubuntu 14.04
• Canonical Ubuntu 16.04

Description

USN-4969-1 fixed a vulnerability in DHCP. This update provides the corresponding update for Ubuntu 14.04 ESM and 16.04 ESM.

Original advisory details:

Jon Franklin and Pawel Wieczorkiewicz discovered that DHCP incorrectly handled lease file parsing. A remote attacker could possibly use this issue to cause DHCP to crash, resulting in a denial of service.

CVEs contained in this USN include: CVE-2021-25217

Affected VMware Products and Versions

Severity is medium unless otherwise noted.

• Tanzu Greenplum for Kubernetes
  • All versions prior to 2.0.0
• Isolation Segment
  • 2.7.x versions with Xenial Stemcells prior to 456.165
  • 2.8.x versions with Xenial Stemcells prior to 621.130
  • 2.9.x versions with Xenial Stemcells prior to 621.130
  • 2.10.x versions with Xenial Stemcells prior to 621.130
  • 2.11.x versions with Xenial Stemcells prior to 621.130
• Operations Manager
  • 2.9.x versions prior to 2.9.20
  • 2.10.x versions prior to 2.10.13
• VMware Tanzu Application Service for VMs
  • 2.7.x versions with Xenial Stemcells prior to 456.165
  • 2.8.x versions with Xenial Stemcells prior to 621.130
  • 2.9.x versions with Xenial Stemcells prior to 621.130
  • 2.10.x versions with Xenial Stemcells prior to 621.130
  • 2.11.x versions with Xenial Stemcells prior to 621.130
  • 2.12.x versions with Xenial Stemcells prior to 621.130

Mitigation

Users of affected products are strongly encouraged to follow the mitigation below. On the Tanzu Network product page for each release, check the Depends On section and/or Release Notes for this information. Releases that have fixed this issue include:

• Tanzu Greenplum for Kubernetes
  • 2.0.0
• Isolation Segment
  • 2.7.x: Upgrade Xenial Stemcells to 456.165 or greater
  • 2.8.x: Upgrade Xenial Stemcells to 621.130 or greater
  • 2.9.x: Upgrade Xenial Stemcells to 621.130 or greater
  • 2.10.x: Upgrade Xenial Stemcells to 621.130 or greater
  • 2.11.x: Upgrade Xenial Stemcells to 621.130 or greater
• Operations Manager
  • 2.9.20
  • 2.10.13
• VMware Tanzu Application Service for VMs
  • 2.7.x: Upgrade Xenial Stemcells to 456.165 or greater
  • 2.8.x: Upgrade Xenial Stemcells to 621.130 or greater
  • 2.9.x: Upgrade Xenial Stemcells to 621.130 or greater
  • 2.10.x: Upgrade Xenial Stemcells to 621.130 or greater
  • 2.11.x: Upgrade Xenial Stemcells to 621.130 or greater
  • 2.12.x: Upgrade Xenial Stemcells to 621.130 or greater

References

• https://people.canonical.com/~ubuntu-security/cve/CVE-2021-25217
• https://ubuntu.com/security/notices/USN-4969-2
• https://cloudfoundry.org/blog/usn-4969-2

History

2021-12-07: Initial vulnerability report published.