CVE-2023-24490:Citrix Virtual Delivery Agent (VDA) privilege escalation vulnerability allowing unauthorized desktop access

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CVE-2023-24490 affects Citrix Virtual Delivery Agent (VDA) for both Windows and Linux platforms in CVAD and Citrix DaaS environments. The vulnerability allows users who only have permissions to launch VDA applications to gain unauthorized access to full desktop sessions, effectively bypassing access control restrictions.

Overview

This security vulnerability exists in Citrix Virtual Delivery Agent (VDA) for both Windows and Linux systems. When exploited, it enables users who are only authorized to access specific applications to bypass these restrictions and launch a full desktop session. This represents a privilege escalation issue that could lead to unauthorized access to system resources beyond what was intended by administrators. The vulnerability affects multiple versions of the VDA component in Citrix Virtual Apps and Desktops (CVAD) and Citrix DaaS environments.

Remediation

Administrators should apply the appropriate patches provided by Citrix as soon as possible. Citrix has released security updates to address this vulnerability in affected products. The specific updates required depend on the version of VDA being used:

For Windows VDA:

  • Update to the latest version according to Citrix's security bulletin
  • Apply any recommended configuration changes

For Linux VDA:

  • Update to the patched version as specified in the Citrix advisory
  • Verify that the update has been successfully applied

Additionally, administrators should:

  • Review user access permissions to ensure they align with organizational requirements
  • Monitor for any signs of unauthorized desktop access
  • Consider implementing additional access controls as a defense-in-depth measure

References

  1. Citrix Security Bulletin: https://support.citrix.com/article/CTX559370/windows-and-linux-virtual-delivery-agent-for-cvad-and-citrix-daas-security-bulletin-cve202324490
  2. National Vulnerability Database: https://nvd.nist.gov/vuln/detail/CVE-2023-24490
  3. Citrix Product Documentation: https://docs.citrix.com/en-us/citrix-virtual-apps-desktops

Industry ExposureMost to least
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.

  1. Health Care & Social Assistance
    Health Care & Social Assistance
  2. Manufacturing
    Manufacturing
  3. Finance and Insurance
    Finance and Insurance
  4. Professional, Scientific, & Technical Services
    Professional, Scientific, & Technical Services
  5. Public Administration
    Public Administration
  6. Retail Trade
    Retail Trade
  7. Transportation & Warehousing
    Transportation & Warehousing
  8. Utilities
    Utilities
  9. Arts, Entertainment & Recreation
    Arts, Entertainment & Recreation
  10. Educational Services
    Educational Services
  11. Management of Companies & Enterprises
    Management of Companies & Enterprises
  12. Wholesale Trade
    Wholesale Trade
  13. Accommodation & Food Services
    Accommodation & Food Services
  14. Administrative, Support, Waste Management & Remediation Services
    Administrative, Support, Waste Management & Remediation Services
  15. Agriculture, Forestry Fishing & Hunting
    Agriculture, Forestry Fishing & Hunting
  16. Construction
    Construction
  17. Information
    Information
  18. Mining
    Mining
  19. Other Services (except Public Administration)
    Other Services (except Public Administration)
  20. Real Estate Rental & Leasing
    Real Estate Rental & Leasing

Focus on What Matters

  1. See Everything.
  2. Identify True Risk.
  3. Proactively Mitigate Threats.

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