Vulnerability-Lookup

CVE-2023-20867 (GCVE-0-2023-20867)

Vulnerability from cvelistv5 – Published: 2023-06-13 16:47 – Updated: 2025-10-21 23:05

CISA Previdian

Title

VMware Tools Authentication Bypass Vulnerability

Summary

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.

Severity

3.9 (Low)


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

SSVC

Exploitation: active Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-04 19:00 UTC

CWE

CWE-287 - Improper Authentication

Assigner

vmware mitre root

References

10 references

URL	Tags
https://www.vmware.com/security/advisories/VMSA-2…
https://security.netapp.com/advisory/ntap-2023072…
https://lists.debian.org/debian-lts-announce/2023…
https://www.debian.org/security/2023/dsa-5493
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
http://www.openwall.com/lists/oss-security/2023/10/16/2
http://www.openwall.com/lists/oss-security/2023/1…
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

1 product

Vendor	Product	Version	CPE status
VMware	VMware Tools	Unaffected: 12.2.5	guessed

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: a4a5f309-3149-4b71-aa53-5e75cd8d6d6d

Vulnerability ID: CVE-2023-20867

Status: Confirmed

Status Updated: 2023-06-23 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2023-06-23

Asserted: 2023-06-23

Scope

Notes: KEV entry: VMware Tools Authentication Bypass Vulnerability | Affected: VMware / Tools | Description: 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. | Required action: Apply updates per vendor instructions. | Due date: 2023-07-14 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://www.vmware.com/security/advisories/VMSA-2023-0013.html; https://nvd.nist.gov/vuln/detail/CVE-2023-20867

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details

Cwes	CWE-287
Feed	CISA Known Exploited Vulnerabilities Catalog
Product	Tools
Due Date	2023-07-14
Date Added	2023-06-23
Vendorproject	VMware
Vulnerabilityname	VMware Tools Authentication Bypass Vulnerability
Knownransomwarecampaignuse	Unknown

References

CVE-2023-20867

Created: 2026-02-02 12:26 UTC | Updated: 2026-02-06 07:17 UTC

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: 6171be60-7107-435f-b922-b210619c1709

Vulnerability ID: CVE-2023-20867

Status: Confirmed

Status Updated: 2023-06-23 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2023-06-23

Asserted: 2023-06-23

Scope

Notes: KEVIntel entry: VMware Tools Authentication Bypass Vulnerability | Affected: VMware / VMware Tools | CVSS: 3.9 (LOW) | Used in malware: unknown | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details

Feed	KEVIntel (kevintel.com)
Title	VMware Tools Authentication Bypass Vulnerability
Vendor	VMware
Product	VMware Tools
Added Date	2023-06-23T00:00:00.000Z
Cvss Score	3.9
Epss Score	None
Cvss Severity	LOW
Epss Percentile	None
Used In Malware	unknown
Ahead Of Cisa Kev	None
Not Yet In Cisa Kev	False

References

Created: 2026-06-23 14:05 UTC | Updated: 2026-07-10 06:14 UTC

Show details on NVD website

JSON

To clipboard

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}

ubuntu-cve-2023-20867

Vulnerability from osv_ubuntu

Published

2023-06-13 00:00

Modified

2026-04-22 07:45

Summary

Details

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.

Severity

3.9 (Low)


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

3.9 (Low)


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

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2023-20867	REPORT
	https://www.vmware.com/security/advisories/VMSA-2…	REPORT
	https://ubuntu.com/security/notices/USN-6257-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2023-20867	REPORT
	https://www.cisa.gov/known-exploited-vulnerabilit…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "open-vm-tools",
            "binary_version": "2:10.2.0-3~ubuntu0.16.04.1+esm2"
          },
          {
            "binary_name": "open-vm-tools-desktop",
            "binary_version": "2:10.2.0-3~ubuntu0.16.04.1+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "open-vm-tools",
        "purl": "pkg:deb/ubuntu/open-vm-tools@2:10.2.0-3~ubuntu0.16.04.1+esm2?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:10.2.0-3~ubuntu0.16.04.1+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:9.10.2-2822639-1ubuntu3",
        "2:10.0.0-3000743-3ubuntu1",
        "2:10.0.7-3227872-2ubuntu1",
        "2:10.0.7-3227872-5ubuntu1~16.04.1",
        "2:10.0.7-3227872-5ubuntu1~16.04.2",
        "2:10.2.0-3~ubuntu0.16.04.1",
        "2:10.2.0-3~ubuntu0.16.04.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
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          {
            "binary_name": "open-vm-tools",
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      "package": {
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      },
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          ],
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        }
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      "versions": [
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        "2:10.1.10-3build1",
        "2:10.1.15-1",
        "2:10.1.15-1build1",
        "2:10.2.0-2",
        "2:10.2.0-2build1",
        "2:10.2.0-3",
        "2:10.2.0-3ubuntu1",
        "2:10.2.0-3ubuntu2",
        "2:10.2.0-3ubuntu3",
        "2:10.3.0-0ubuntu1~18.04.1",
        "2:10.3.0-0ubuntu1~18.04.2",
        "2:10.3.0-0ubuntu1~18.04.3",
        "2:10.3.5-7~ubuntu0.18.04.1",
        "2:10.3.10-1~ubuntu0.18.04.1",
        "2:11.0.1-2ubuntu0.18.04.2",
        "2:11.0.5-4ubuntu0.18.04.1",
        "2:11.0.5-4ubuntu0.18.04.2",
        "2:11.0.5-4ubuntu0.18.04.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
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            "binary_version": "2:11.3.0-2ubuntu0~ubuntu20.04.5"
          },
          {
            "binary_name": "open-vm-tools-desktop",
            "binary_version": "2:11.3.0-2ubuntu0~ubuntu20.04.5"
          },
          {
            "binary_name": "open-vm-tools-sdmp",
            "binary_version": "2:11.3.0-2ubuntu0~ubuntu20.04.5"
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      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "open-vm-tools",
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      },
      "ranges": [
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      "ecosystem_specific": {
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          },
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            "binary_name": "open-vm-tools-desktop",
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        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "open-vm-tools",
        "purl": "pkg:deb/ubuntu/open-vm-tools@2:12.1.5-3~ubuntu0.22.04.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:12.1.5-3~ubuntu0.22.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:11.3.0-2ubuntu1",
        "2:11.3.0-2ubuntu2",
        "2:11.3.5-1",
        "2:11.3.5-1ubuntu2",
        "2:11.3.5-1ubuntu3",
        "2:11.3.5-1ubuntu4",
        "2:11.3.5-1ubuntu4.1",
        "2:12.1.0-1~ubuntu0.22.04.1",
        "2:12.1.5-3~ubuntu0.22.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2023-20867",
  "modified": "2026-04-22T07:45:12Z",
  "published": "2023-06-13T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-20867"
    },
    {
      "type": "REPORT",
      "url": "https://www.vmware.com/security/advisories/VMSA-2023-0013"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6257-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-20867"
    },
    {
      "type": "REPORT",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog"
    }
  ],
  "related": [
    "USN-6257-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2023-20867"
  ]
}

WID-SEC-W-2023-1456

Vulnerability from csaf_certbund - Published: 2023-06-13 22:00 - Updated: 2024-05-14 22:00

Summary

VMware Tools: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Severity

Niedrig

Scope

1 vulnerability in this advisory, including CVE-2023-20867.

CVE-2023-20867

Es besteht eine Schwachstelle in VMware Tools bezüglich des "vgauth"-Moduls. Die "Host-to-Guest"-Vorgänge werden nicht ordnungsgemäß authentifiziert. Ein Angreifer, der den Hypervisor (z.B. ESXi) kontrolliert, kann dies ausnutzen, um die Vertraulichkeit und Integrität der betroffenen virtuellen Gastmaschinen zu beeinträchtigen.

Known affected: 9 products

Open the full advisory

WID-SEC-W-2023-2625

Vulnerability from csaf_certbund - Published: 2023-10-10 22:00 - Updated: 2025-08-06 22:00

Summary

IBM QRadar SIEM: Mehrere Schwachstellen

Severity

Hoch

Scope

40 vulnerabilities in this advisory, including CVE-2023-20867.

CVE-2023-20867

Known affected: 3 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2023-20867 (GCVE-0-2023-20867)

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Vendor Report Successful Exploitation Confidence: 80% Source: cisa-kev

Details

References

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Public Report Successful Exploitation Confidence: 70% Source: kevintel

Details

References

ubuntu-cve-2023-20867

Vulnerability from osv_ubuntu

WID-SEC-W-2023-1456

WID-SEC-W-2023-2625

Tags

Sightings

Nomenclature

Related by attack behaviour