SAML token signature bypass in VMware Tools
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2023-20900 |
| CWE-ID | CWE-310 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
VMware Tools Client/Desktop applications / Other client software open-vm-tools Other software / Other software solutions |
| Vendor | VMware, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Cryptographic issues
EUVDB-ID: #VU80188
Risk: Medium
CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-20900
CWE-ID:
CWE-310 - Cryptographic Issues
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsVMware Tools: 10.3.0 - 12.2.6
open-vm-tools: 10.3.0 - 12.2.5
External linkshttp://www.vmware.com/security/advisories/VMSA-2023-0019.html
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.
