CVE-2023-4966:CVE-2023-4966 is a critical vulnerability in Citrix NetScaler ADC and NetScaler Gateway that allows for unauthenticated sensitive information disclosure when configured as a Gateway or AAA virtual server.

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Description Preview

CVE-2023-4966 involves a sensitive information disclosure vulnerability in Citrix's NetScaler ADC and NetScaler Gateway products. This vulnerability is present in specific versions of the software when they are configured as a Gateway (including VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or as an AAA virtual server. The vulnerability has a CVSS base score of 9.4, indicating a critical severity level, with high impacts on confidentiality and integrity. Attackers can exploit this vulnerability without requiring authentication, making it particularly dangerous.

Overview

  • CVE ID: CVE-2023-4966
  • Vendor: Citrix
  • Products Affected:
    • NetScaler ADC
      • Versions affected: 14.1 (less than 8.50), 13.1 (less than 49.15), 13.0 (less than 92.19), 13.1-FIPS (less than 37.164), 12.1-FIPS (less than 55.300), 12.1-NDcPP (less than 55.300)
    • NetScaler Gateway
      • Versions affected: 14.1 (less than 8.50), 13.1 (less than 49.15), 13.0 (less than 92.19)
  • Impact: High confidentiality and integrity impact, low availability impact.
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None

Remediation

To mitigate the risks associated with CVE-2023-4966, it is recommended that users of the affected Citrix products upgrade to the latest versions that are not vulnerable. Citrix has provided patches for the affected versions. Users should consult the Citrix support article CTX579459 for detailed instructions on how to apply the necessary updates.

References

  1. Citrix Support Article: CTX579459
  2. Proof of Concept: Packet Storm Security
  3. CISA Known Exploited Vulnerabilities Catalog: CISA Reference

Early Warning

Customers using Armis Early Warning were notified about this vulnerability before it appeared in CISA's Known Exploited Vulnerabilities Catalog, enabling them to assess their exposure and act proactively. Armis offers these examples of CVEs already included in CISA KEV for potential customers. Click here to learn how to receive alerts earlier.

Armis Alert Date
Oct 10, 2023
CISA KEV Date
Oct 18, 2023
8days early

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

Focus on What Matters

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

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