VMware Tools Authentication Bypass Vulnerability

Technical Severity

CVSS v3.1 Metrics

LOW

3.9 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Exploitation Likelihood

EPSS Prediction

2.72 %

Predictive Probability

Percentile Rank

85.9 th

Documented as more likely to be exploited than 85.9% of known CVEs.

Detection Date

Jun 23, 2023

Remediation Due

Jul 14, 2023

CISA Catalog Active

Threat Analysis

VMware Tools contains an authentication bypass vulnerability in the vgauth module. A fully compromised ESXi host can force VMware Tools to fail to authenticate host-to-guest operations, impacting the confidentiality and integrity of the guest virtual machine. An attacker must have root access over ESXi to exploit this vulnerability.

Remediation Directive

Apply updates per vendor instructions.

External Intelligence

https://www.vmware.com/security/advisories/VMSA-2023-0013.html

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2023-20867