#VU80188 Cryptographic issues in VMware Tools and open-vm-tools - CVE-2023-20900

Vulnerability identifier: #VU80188

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-20900

CWE-ID: CWE-310

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
VMware Tools
Client/Desktop applications / Other client software
open-vm-tools
Other software / Other software solutions

Vendor: VMware, Inc

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper verification of SAML token signature. A remote attacker can bypass SAML token signature verification and perform man-in-the-middle (MITM) network positioning between vCenter server and the virtual machine.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

VMware Tools: 10.3.0 - 12.2.6

open-vm-tools: 10.3.0 - 12.2.5

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External links
https://www.vmware.com/security/advisories/VMSA-2023-0019.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.