Severity

High

Vendor

VMware Tanzu

Versions Affected

• Canonical Ubuntu 16.04

Description

Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly compute a speculative execution limit on pointer arithmetic in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-27171)

Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly apply speculative execution limits on some pointer types. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-27170)

CVEs contained in this USN include: CVE-2020-27170, CVE-2020-27171

Affected VMware Products and Versions

Severity is high unless otherwise noted.

• Isolation Segment
  • 2.7.x versions with Xenial Stemcells prior to 456.154
  • 2.8.x versions with Xenial Stemcells prior to 621.117
  • 2.9.x versions with Xenial Stemcells prior to 621.117
  • 2.10.x versions with Xenial Stemcells prior to 621.117
  • 2.11.x versions with Xenial Stemcells prior to 621.117
• Operations Manager
  • 2.7.x versions prior to 2.7.30
  • 2.9.x versions prior to 2.9.19
  • 2.10.x versions prior to 2.10.9
• VMware Tanzu Application Service for VMs
  • 2.7.x versions with Xenial Stemcells prior to 456.154
  • 2.8.x versions with Xenial Stemcells prior to 621.117
  • 2.9.x versions with Xenial Stemcells prior to 621.117
  • 2.10.x versions with Xenial Stemcells prior to 621.117
  • 2.11.x versions with Xenial Stemcells prior to 621.117

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:

• Isolation Segment
  • 2.7.x: Upgrade Xenial Stemcells to 456.154 or greater
  • 2.8.x: Upgrade Xenial Stemcells to 621.117 or greater
  • 2.9.x: Upgrade Xenial Stemcells to 621.117 or greater
  • 2.10.x: Upgrade Xenial Stemcells to 621.117 or greater
  • 2.11.x: Upgrade Xenial Stemcells to 621.117 or greater
• Operations Manager
  • 2.7.30
  • 2.9.19
  • 2.10.9
• VMware Tanzu Application Service for VMs
  • 2.7.x: Upgrade Xenial Stemcells to 456.154 or greater
  • 2.8.x: Upgrade Xenial Stemcells to 621.117 or greater
  • 2.9.x: Upgrade Xenial Stemcells to 621.117 or greater
  • 2.10.x: Upgrade Xenial Stemcells to 621.117 or greater
  • 2.11.x: Upgrade Xenial Stemcells to 621.117 or greater

References

• https://people.canonical.com/~ubuntu-security/cve/CVE-2020-27170
• https://people.canonical.com/~ubuntu-security/cve/CVE-2020-27171
• https://ubuntu.com/security/notices/USN-4890-1

History

2021-09-13: Initial vulnerability report published.