Home/CVE/VMware Tools Authentication Bypass Vulnerability
CVE

CVE-2023-20867

VMware Tools Authentication Bypass Vulnerability

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.

LOW · CVSS 3.9 ⚠ CISA KEV EPSS 0.02946
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
Sigma rules7 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

◆

Threat Actors Linked

1
actorUNC3886
⬡

Weakness Classification

CWE-287Improper Authentication
▤

Affected Products & Versions

3
vmware tools>= 10.3.0 and < 12.2.5
debian linuxall versions
fedoraproject fedoraall versions
◈

Sigma Hunt Rules

7
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productcriticalHackTool - Credential Dumping Tools Named Pipe Created
productcriticalZerologon Exploitation Using Well-known Tools
producthighOutbound RDP Connections Over Non-Standard Tools
producthighCred Dump Tools Dropped Files
producthighUAC Bypass Tools Using ComputerDefaults
producthighPotential Data Exfiltration Activity Via CommandLine Tools
▣

Scoring & Timeline

3.9
LOW · CVSS v3.1 · security@vmware.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Jun 2023 · 05:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

17
suse-csafopenSUSE-SU-2024:13022-1
suse-csafSUSE-SU-2023:2604-2
suse-csafSUSE-SU-2023:3504-1
suse-csafSUSE-SU-2023:3505-1
usnUSN-6257-1
🔗

References & Sources

9
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2023/10/16/11Mailing ListPatch
http://www.openwall.com/lists/oss-security/2023/10/16/2Mailing ListPatch
https://lists.debian.org/debian-lts-announce/2023/08/msg00020.htmlMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NVKQ6Y2JFJRWPFOZUOTFO3H27BK5GGOG/Mailing ListRelease Notes
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TJNJMD67QIT6LXLKWSHFM47DCLRSMT6W/Mailing ListRelease Notes
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZJM6HDRQYS74JA7YNKQBFH2XSZ52HEWH/Mailing ListRelease Notes
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