Severity

high

Vendor

VMware Tanzu

Versions Affected

• Canonical Ubuntu 16.04
• Canonical Ubuntu 18.04

Description

Nadav Amit discovered that the hugetlb implementation in the Linux kernel did not perform TLB flushes under certain conditions. A local attacker could use this to leak or alter data from other processes that use huge pages. (CVE-2021-4002) It was discovered that a race condition existed in the timer implementation in the Linux kernel. A privileged attacker could use this cause a denial of service. (CVE-2021-20317) It was discovered that a race condition existed in the overlay file system implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2021-20321) It was discovered that the NFC subsystem in the Linux kernel contained a use-after-free vulnerability in its NFC Controller Interface (NCI) implementation. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-3760) It was discovered that an integer overflow could be triggered in the eBPF implementation in the Linux kernel when preallocating objects for stack maps. A privileged local attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-41864) It was discovered that the ISDN CAPI implementation in the Linux kernel contained a race condition in certain situations that could trigger an array out-of-bounds bug. A privileged local attacker could possibly use this to cause a denial of service or execute arbitrary code. (CVE-2021-43389)

CVEs contained in this USN include: CVE-2021-3760, CVE-2021-43389, CVE-2021-4002, CVE-2021-20317, CVE-2021-20321, CVE-2021-41864

Affected VMware Products and Versions

Severity is high unless otherwise noted.

• Platform Automation Toolkit
  • 4.0.x versions prior to 4.0.13
  • 4.1.x versions prior to 4.1.13
  • 4.2.x versions prior to 4.2.8
  • 4.3.x versions prior to 4.3.5
• Isolation Segment
  • 2.7.x versions prior to 2.7.42, or later versions with Xenial Stemcells prior to 456.224
  • 2.10.x versions prior to 2.10.21, or later versions with Xenial Stemcells prior to 621.196
  • 2.11.x versions prior to 2.11.10, or later versions with Xenial Stemcells prior to 621.196
  • 2.12.x versions prior to 2.12.4, or later versions with Xenial Stemcells prior to 621.196
• Operations Manager
  • 2.9.x versions prior to 2.9.27
  • 2.10.x versions prior to 2.10.26
• VMware Tanzu Application Service for VMs
  • 2.7.x versions prior to 2.7.47, or later versions with Xenial Stemcells prior to 456.224
  • 2.10.x versions prior to 2.10.26, or later versions with Xenial Stemcells prior to 621.196
  • 2.11.x versions prior to 2.11.14, or later versions with Xenial Stemcells prior to 621.196
  • 2.12.x versions prior to 2.12.7, or later versions with Xenial Stemcells prior to 621.196

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:

• Platform Automation Toolkit
  • 4.0.13
  • 4.1.13
  • 4.2.8
  • 4.3.5
• Isolation Segment
  • 2.7.42, and upgrade Xenial Stemcells to 456.224 or greater
  • 2.10.21, and upgrade Xenial Stemcells to 621.196 or greater
  • 2.11.10, and upgrade Xenial Stemcells to 621.196 or greater
  • 2.12.4, and upgrade Xenial Stemcells to 621.196 or greater
• Operations Manager
  • 2.9.27
  • 2.10.26
• VMware Tanzu Application Service for VMs
  • 2.7.47, and upgrade Xenial Stemcells to 456.224 or greater
  • 2.10.26, and upgrade Xenial Stemcells to 621.196 or greater
  • 2.11.14, and upgrade Xenial Stemcells to 621.196 or greater
  • 2.12.7, and upgrade Xenial Stemcells to 621.196 or greater

References

• https://ubuntu.com/security/CVE-2021-3760
• https://ubuntu.com/security/CVE-2021-43389
• https://ubuntu.com/security/CVE-2021-4002
• https://ubuntu.com/security/CVE-2021-20317
• https://ubuntu.com/security/CVE-2021-20321
• https://ubuntu.com/security/CVE-2021-41864
• https://ubuntu.com/security/notices/USN-5209-1
• https://cloudfoundry.org/blog/usn-5209-1

History

2022-03-17: Initial vulnerability report published.