Severity

High

Vendor

VMware Tanzu

Versions Affected

• Canonical Ubuntu 14.04
• Canonical Ubuntu 16.04

Description

It was discovered that the LIO SCSI target implementation in the Linux kernel performed insufficient identifier checking in certain XCOPY requests. An attacker with access to at least one LUN in a multiple backstore environment could use this to expose sensitive information or modify data.

CVEs contained in this USN include: CVE-2020-28374

Affected VMware Products and Versions

Severity is high unless otherwise noted.

Vulnerable Cloud Foundry components individually listed here.

Impacted stemcells may be updated independently of upgrading Tanzu Application Service or Isolation Segment.

• Isolation Segment
  • 2.7.x versions with Xenial Stemcells prior to 456.133
  • 2.8.x versions with Xenial Stemcells prior to 621.97
  • 2.9.x versions with Xenial Stemcells prior to 621.97
  • 2.10.x versions with Xenial Stemcells prior to 621.97
• Operations Manager
  • 2.7 versions prior to 2.7.28
  • 2.9 versions prior to 2.9.16
  • 2.10 versions prior to 2.10.5
• VMware Tanzu Application Service for VMs
  • 2.7.x versions with Xenial Stemcells prior to 456.133
  • 2.8.x versions with Xenial Stemcells prior to 621.97
  • 2.9.x versions with Xenial Stemcells prior to 621.97
  • 2.10.x versions with Xenial Stemcells prior to 621.97

Mitigation

Users of affected products are strongly encouraged to follow the mitigation below. The Cloud Foundry security team recommends upgrading the affected OSS components listed here if applicable. Upgrade VMware Tanzu products that use earlier versions of CF components to new Tanzu releases using new versions linked above. 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:

• Isolation Segment
  • 2.7.x: Upgrade Xenial Stemcells to 456.133 or greater
  • 2.8.x: Upgrade Xenial Stemcells to 621.97 or greater
  • 2.9.x: Upgrade Xenial Stemcells to 621.97 or greater
  • 2.10.x: Upgrade Xenial Stemcells to 621.97 or greater
• Operations Manager
  • 2.7.28
  • 2.9.16
  • 2.10.5
• VMware Tanzu Application Service for VMs
  • 2.7.x: Upgrade Xenial Stemcells to 456.133 or greater
  • 2.8.x: Upgrade Xenial Stemcells to 621.97 or greater
  • 2.9.x: Upgrade Xenial Stemcells to 621.97 or greater
  • 2.10.x: Upgrade Xenial Stemcells to 621.97 or greater

References

• https://people.canonical.com/~ubuntu-security/cve/CVE-2020-28374
• https://ubuntu.com/security/notices/USN-4694-1
• https://cloudfoundry.org/blog/usn-4694-1

History

2021-03-01: Initial vulnerability report published.