CVE-2020-23972:Joomla Component GMapFP (J3.5 and J3.5free) contains an arbitrary file upload vulnerability allowing unauthenticated attackers to upload malicious files.

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The Joomla Component GMapFP versions J3.5 and J3.5free contain a critical vulnerability that allows unauthenticated attackers to upload arbitrary files to the server. The vulnerability exists because the component fails to properly validate file uploads and does not require authentication to access the upload functionality. Attackers can bypass the upload restrictions by manipulating the content-type header and using double file extensions, potentially leading to remote code execution on the affected server.

Overview

This vulnerability (CVE-2020-23972) is classified as CWE-434 (Unrestricted Upload of File with Dangerous Type). The issue affects the GMapFP component for Joomla in versions J3.5 and J3.5free. The vulnerability allows unauthenticated attackers to upload malicious files to the server by bypassing the file upload restrictions. The attacker can manipulate the content-type header during the upload request and use double file extensions to disguise malicious files as legitimate ones. If successfully exploited, this vulnerability could lead to remote code execution, allowing attackers to take control of the affected system, access sensitive information, or further compromise the server infrastructure.

Remediation

To remediate this vulnerability, website administrators should:

  1. Update the GMapFP component to the latest version if a patched version is available.
  2. If no update is available, consider temporarily disabling the GMapFP component until a fix is released.
  3. Implement proper authentication controls for all file upload functions.
  4. Configure server-side validation to strictly verify file types and content regardless of the reported content-type.
  5. Implement proper file extension validation that cannot be bypassed using double extensions.
  6. Set appropriate file permissions on upload directories to prevent execution of uploaded files.
  7. Consider implementing a web application firewall (WAF) to help block malicious upload attempts.
  8. Regularly monitor server logs for suspicious file upload activities.

References

  1. Packet Storm Security Advisory: http://packetstormsecurity.com/files/159072/Joomla-GMapFP-J3.5-J3.5F-Arbitrary-File-Upload.html
  2. Exploit and Technical Details: https://raw.githubusercontent.com/me4yoursecurity/Reports/master/README.md
  3. CWE-434: Unrestricted Upload of File with Dangerous Type: https://cwe.mitre.org/data/definitions/434.html

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

Focus on What Matters

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

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