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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.

CVE-2023-20867 is a vulnerability categorized under CWE-287 (Improper Authentication) affecting VMware Tools, a suite of utilities that enhances the performance and management of virtual machines running on VMware ESXi hosts. The vulnerability allows a fully compromised ESXi host to cause VMware Tools to fail in authenticating host-to-guest operations. This failure can undermine the confidentiality and integrity of the guest virtual machine by potentially allowing unauthorized or manipulated communications between the host and guest. The CVSS v3.1 base score is 3.9, indicating a low severity level. The attack vector is local (AV:L), requiring high attack complexity (AC:H) and high privileges (PR:H) on the host, with no user interaction (UI:N). The scope is changed (S:C), meaning the vulnerability affects components beyond the initially vulnerable system, impacting both host and guest environments. Although no specific affected versions are listed and no known exploits have been reported in the wild, the vulnerability is significant in scenarios where an attacker has already gained full control over the ESXi host. In such cases, the attacker could manipulate VMware Tools to bypass authentication mechanisms, potentially leading to unauthorized data access or tampering within guest VMs. This vulnerability highlights the critical dependency of guest VM security on the integrity of the underlying ESXi host and the VMware Tools authentication process. Since VMware Tools is widely used in enterprise virtualization, this vulnerability requires attention to host security and timely patching once fixes are released by VMware.

Detailed information about CVE-2023-20867: CWE-287 Improper Authentication in VMware VMware Tools affecting VMware VMware Tools. Get real-time updates, technica

CVE-2023-20867: CWE-287 Improper Authentication in VMware VMware Tools - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-20867: CWE-287 Improper Authentication in VMware VMware Tools

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