CVE-2021-33981:Insecure direct object reference vulnerability in "Fish | Hunt FL" iOS app allows authenticated attackers to access other users' personal information and license images.

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The "Fish | Hunt FL" iOS application versions 3.8.0 and earlier contains an insecure direct object reference (IDOR) vulnerability in its hunting/fishing license retrieval functionality. This vulnerability allows authenticated attackers to manipulate parameters to access other users' personal information and view images of their hunting and fishing licenses without proper authorization. This represents a significant privacy breach as it exposes sensitive personal information of application users.

Overview

The vulnerability (CVE-2021-33981) is classified as CWE-639, an insecure direct object reference issue in the "Fish | Hunt FL" iOS application. The app fails to properly validate that the user requesting access to a hunting or fishing license has the appropriate permissions to view that specific license. When retrieving license information, the application does not verify that the authenticated user is the owner of the requested license, allowing attackers to access other users' data by manipulating request parameters. This vulnerability affects all versions of the application up to and including version 3.8.0.

Remediation

Organizations and developers should implement the following remediation steps:

  1. Update the "Fish | Hunt FL" iOS application to the latest version that addresses this vulnerability (versions after 3.8.0)
  2. Implement proper access control checks that validate the relationship between the authenticated user and the requested resource
  3. Use indirect reference maps where direct object references are replaced with temporary, random values
  4. Implement server-side validation to ensure users can only access their own license information
  5. Consider adding additional authentication steps for accessing sensitive information
  6. Audit all API endpoints for similar IDOR vulnerabilities

References

  1. Detailed vulnerability analysis: https://gist.github.com/p4lsec/1f024d96b44ea733cdae0605c7ce8a49
  2. CWE-639 (Authorization Bypass Through User-Controlled Key): https://cwe.mitre.org/data/definitions/639.html
  3. OWASP Insecure Direct Object Reference Prevention: https://cheatsheetseries.owasp.org/cheatsheets/Insecure_Direct_Object_Reference_Prevention_Cheat_Sheet.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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