Severity

High

Vendor

VMware Tanzu

Versions Affected

• Canonical Ubuntu 16.04

Description

Adam Nichols discovered that heap overflows existed in the iSCSI subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-27365)

Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did not properly restrict access to iSCSI transport handles. A local attacker could use this to cause a denial of service or expose sensitive information (kernel pointer addresses). (CVE-2021-27363)

Adam Nichols discovered that an out-of-bounds read existed in the iSCSI subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information (kernel memory). (CVE-2021-27364)

CVEs contained in this USN include: CVE-2021-27365, CVE-2021-27363, CVE-2021-27364

Affected VMware Products and Versions

Severity is high unless otherwise noted.

• Isolation Segment
  • 2.7.x versions with Xenial Stemcells prior to 456.152
  • 2.8.x versions with Xenial Stemcells prior to 621.115
  • 2.9.x versions with Xenial Stemcells prior to 621.115
  • 2.10.x versions with Xenial Stemcells prior to 621.115
  • 2.11.x versions with Xenial Stemcells prior to 621.115
• 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 456.152
  • 2.8.x versions with Xenial Stemcells prior to 621.115
  • 2.9.x versions with Xenial Stemcells prior to 621.115
  • 2.10.x versions with Xenial Stemcells prior to 621.115
  • 2.11.x versions with Xenial Stemcells prior to 621.115

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 456.152 or greater
  • 2.8.x: Upgrade Xenial Stemcells to 621.115 or greater
  • 2.9.x: Upgrade Xenial Stemcells to 621.115 or greater
  • 2.10.x: Upgrade Xenial Stemcells to 621.115 or greater
  • 2.11.x: Upgrade Xenial Stemcells to 621.115 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 456.152 or greater
  • 2.8.x: Upgrade Xenial Stemcells to 621.115 or greater
  • 2.9.x: Upgrade Xenial Stemcells to 621.115 or greater
  • 2.10.x: Upgrade Xenial Stemcells to 621.115 or greater
  • 2.11.x: Upgrade Xenial Stemcells to 621.115 or greater

References

• https://people.canonical.com/~ubuntu-security/cve/CVE-2021-27365
• https://people.canonical.com/~ubuntu-security/cve/CVE-2021-27363
• https://people.canonical.com/~ubuntu-security/cve/CVE-2021-27364
• https://ubuntu.com/security/notices/USN-4883-1

History

2021-09-13: Initial vulnerability report published.