CVE-2023-20867 · Severity: critical · CVSS 3.9 · Exploited in the wild · Published 2023-06-23
VMware Tools contains an authentication bypass vulnerability in the vgauth module. A fully compromised ESXi host can bypass authentication for host-to-guest operations, allowing an attacker with root access on the host to impact the confidentiality and integrity of the guest virtual machine.
Yes. CVE-2023-20867 is known to be exploited in the wild, first recorded on 23 June 2023. Treat it as urgent.
How severe is CVE-2023-20867?
Critical severity, with a CVSS score of 3.9, published 23 June 2023.
Which products and versions are affected?
VMware VMware Tools; VMware ESXi.
Is there a fix for CVE-2023-20867?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2023-20867 attacked?
It is attacked with local access, in a software library.
Am I affected by CVE-2023-20867?
Check whether you run VMware Tools. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
VMware VMware Tools
VMware ESXi
Timeline
2023-06-23: disclosed
2023-06-23: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
2023-06-23: exploited: Reported as exploited in the wild at time of publication.