CVE-2021-41608:File Disclosure Vulnerability in SelectSurvey.NET Allows Unauthorized Access to User Data

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Description Preview

A critical file disclosure vulnerability exists in SelectSurvey.NET versions prior to 5.052.000. The vulnerability is present in the UploadedImageDisplay.aspx endpoint, which allows remote, unauthenticated attackers to retrieve survey user submitted data by simply manipulating the ID parameter in sequential order starting from 1. This vulnerability is classified as CWE-639 (Authorization Bypass Through User-Controlled Key) and enables attackers to access sensitive information without proper authentication.

Overview

The vulnerability in SelectSurvey.NET affects the UploadedImageDisplay.aspx endpoint, which is responsible for displaying uploaded images within surveys. Due to improper access controls, an attacker can bypass authorization checks by manipulating the ID parameter in the request. By incrementing this parameter sequentially (starting from 1), the attacker can systematically access user-submitted survey data, including potentially sensitive information. This vulnerability poses a significant risk to data confidentiality as it allows unauthorized access to survey responses that may contain personal or confidential information.

Remediation

Organizations using SelectSurvey.NET should immediately upgrade to version 5.052.000 or later, which contains patches for this vulnerability. If immediate upgrading is not possible, consider implementing the following temporary mitigations:

  1. Restrict access to the UploadedImageDisplay.aspx endpoint through web server configuration or firewall rules
  2. Implement additional authentication mechanisms in front of the application
  3. Monitor access logs for suspicious sequential requests to the vulnerable endpoint
  4. Consider disabling file upload functionality if it's not critical to operations until the patch can be applied

References

  1. Product Information: https://www.classapps.com/product_ssv5.aspx
  2. Detailed Vulnerability Disclosure: https://www.optiv.com/insights/source-zero/blog/classapps-inc-selectsurveynet-v50-vulnerabilities-disclosure
  3. CWE-639: Authorization Bypass Through User-Controlled Key - https://cwe.mitre.org/data/definitions/639.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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