Headline
Ubuntu Security Notice USN-6365-1
Ubuntu Security Notice 6365-1 - It was discovered that Open VM Tools incorrectly handled SAML tokens. A remote attacker could possibly use this issue to bypass SAML token signature verification and perform VMware Tools Guest Operations.
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Ubuntu Security Notice USN-6365-1
September 13, 2023
open-vm-tools vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
Summary:
Open VM Tools could allow unintended access to network services.
Software Description:
- open-vm-tools: Open VMware Tools for virtual machines hosted on VMware
Details:
It was discovered that Open VM Tools incorrectly handled SAML tokens. A
remote attacker could possibly use this issue to bypass SAML token
signature verification and perform VMware Tools Guest Operations.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 23.04:
open-vm-tools 2:12.1.5-3ubuntu0.23.04.2
Ubuntu 22.04 LTS:
open-vm-tools 2:12.1.5-3~ubuntu0.22.04.3
Ubuntu 20.04 LTS:
open-vm-tools 2:11.3.0-2ubuntu0~ubuntu20.04.6
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-6365-1
CVE-2023-20900
Package Information:
https://launchpad.net/ubuntu/+source/open-vm-tools/2:12.1.5-3ubuntu0.23.04.2
https://launchpad.net/ubuntu/+source/open-vm-tools/2:12.1.5-3~ubuntu0.22.04.3
https://launchpad.net/ubuntu/+source/open-vm-tools/2:11.3.0-2ubuntu0~ubuntu20.04.6
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VMware Tools contains a SAML token signature bypass vulnerability. A malicious actor with man-in-the-middle (MITM) network positioning between vCenter server and the virtual machine may be able to bypass SAML token signature verification, to perform VMware Tools Guest Operations.