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Virtual Apps And DesktopsApplication · Citrix

CVE-2024-6151

HIGH · 7.8 CVSS v3.1 Published 2024-07-10
Fix available
A fix is available. Upgrade to after 2311 or later.
See remediation →
80/100
Remediation priority · High
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Local Privilege escalation allows a low-privileged user to gain SYSTEM privileges in Virtual Delivery Agent for Windows used by Citrix Virtual Apps and Desktops and Citrix DaaS

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Local privilege escalation vulnerability in Virtual Delivery Agent (VDA) for Windows allows a low-privileged user to gain SYSTEM-level privileges. The vulnerability affects Citrix Virtual Apps and Desktops and Citrix DaaS deployments.

MitigationApply the vendor-supplied patch for Citrix Virtual Delivery Agent when released; in the interim, restrict local user access to VDA systems and monitor for suspicious process activity.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Virtual Apps And DesktopsApplication
Affected:<= 2311= 1912= 2203

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm VDA installation
    Open Programs and Features in Control Panel or run 'Get-WmiObject -Class Win32_Product' to list installed software. Look for 'Citrix Virtual Delivery Agent' or related Citrix components.
    Affected if Citrix Virtual Delivery Agent is installed on the system
  2. Identify VDA version
    Open Command Prompt or PowerShell and run 'bcdedit' to check the VDA version, or look in the Citrix installation directory (typically C:\Program Files\Citrix\Virtual Delivery Agent) for version information in installer logs or the BrokerService.exe file properties.
    Affected if The VDA version cannot be determined or shows an unpatched build
  3. Compare version to affected ranges
    Note the full version/build number from step 2. Compare it against the affected versions: any build <= 2311, or specifically builds 1912 or 2203.
    Affected if The installed version is 1912, 2203, or any version up to and including 2311
  4. Verify this is a VDA machine
    Check if the machine is joined to a Citrix Virtual Apps and Desktops or Citrix DaaS deployment. Run 'Get-Process' to look for VDA-related processes like BrokerAgent, BrokerService, or Citrix Desktop Service.
    Affected if The system is a published Virtual Desktop or session host in a Citrix deployment and runs an unpatched VDA version

A user is affected if this Windows system has Citrix Virtual Delivery Agent installed with a version of 2311 or lower, or specifically versions 1912 or 2203.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 2311
Interim mitigation

Apply the vendor-supplied patch for Citrix Virtual Delivery Agent when released; in the interim, restrict local user access to VDA systems and monitor for suspicious process activity.

Recommended fix High confidence

For 1912 LTSR: CU3 or later; For 2203 LTSR: CU2 or later; For 2311: Upgrade to 2312 or later Current Release

  1. Identify the current deployment version (1912 LTSR, 2203 LTSR, or 2311 CR) by checking the Virtual Delivery Agent (VDA) installation
  2. For 1912 LTSR: Apply Cumulative Update 3 (CU3) or later from the Citrix downloads page - this includes the security fix for CVE-2024-6151
  3. For 2203 LTSR: Apply Cumulative Update 2 (CU2) or later from the Citrix downloads page - this includes the security fix for CVE-2024-6151
  4. For 2311 (Current Release): Upgrade to version 2312 or later which contains the fix
  5. After applying the update/hotfix, restart the VDA services or reboot the machine to ensure the new privileges take effect
  6. Verify the fix by confirming the VDA service runs with the correct, restricted privileges and low-privileged users cannot obtain SYSTEM access
Caveat Review Citrix CTX documentation for any configuration changes required when applying Cumulative Updates, as some settings may need adjustment

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Virtual Apps And Desktops Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-6151 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data