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Ubuntu Security Notice USN-6463-2
December 06, 2023

open-vm-tools vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in Open VM Tools.

Software Description:
- open-vm-tools: Open VMware Tools for virtual machines hosted on VMware

Details:

USN-6463-1 fixed vulnerabilities in Open VM Tools. This update provides
the corresponding updates for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

  It was discovered that Open VM Tools incorrectly handled SAML tokens. A
  remote attacker with Guest Operations privileges could possibly use this
  issue to elevate their privileges. (CVE-2023-34058)

  Matthias Gerstner discovered that Open VM Tools incorrectly handled file
  descriptors when dropping privileges. A local attacker could possibly use
  this issue to hijack /dev/uinput and simulate user inputs.
  (CVE-2023-34059)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   open-vm-tools                   2:11.0.5-4ubuntu0.18.04.3+esm3
   open-vm-tools-desktop     2:11.0.5-4ubuntu0.18.04.3+esm3

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   open-vm-tools                   2:10.2.0-3~ubuntu0.16.04.1+esm4
   open-vm-tools-desktop     2:10.2.0-3~ubuntu0.16.04.1+esm4

In general, a standard system update will make all the necessary changes.

References:
   https://ubuntu.com/security/notices/USN-6463-2
   https://ubuntu.com/security/notices/USN-6463-1
   CVE-2023-34058, CVE-2023-34059