CVE-2011-3814:WebCalendar 1.2.3 and all versions before 1.2.5 contain an information disclosure vulnerability that allows remote attackers to obtain the installation path by directly requesting certain PHP files (for example ws/user_mod.php).

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WebCalendar (versions 1.2.3 and older than 1.2.5) is vulnerable to an information disclosure that enables remote attackers to discover sensitive installation paths. By making a direct request to specific PHP files, the application can reveal internal directory structures through an error message, as demonstrated by ws/user_mod.php and other related files. This CVE (CVE-2011-3814) highlights exposure of internal paths via PHP error output, potentially aiding further attacks.

Overview

This vulnerability in WebCalendar permits remote disclosure of internal installation paths by triggering error messages from directly requested PHP files (notably ws/user_mod.php). Affected are WebCalendar 1.2.3 and any versions prior to 1.2.5, enabling an attacker to learn the system’s directory layout from produced error output.

Remediation

  • Upgrade to WebCalendar 1.2.5 or newer where the vulnerability is fixed.
  • If upgrading is not feasible, apply mitigations:
    • Remove or restrict direct access to vulnerable PHP entry points (e.g., ws/user_mod.php) or implement access controls to prevent unauthorized requests.
    • Disable detailed error messages in production (set display_errors off) and enable general error logging (log_errors on) to avoid leaking file paths.
    • Ensure the web server and application do not emit internal path information in any error responses; apply patches or vendor advisories if available.
    • Consider applying a Web Application Firewall (WAF) rule to block or monitor requests to known vulnerable endpoints.

References

  • http://webcalendar.cvs.sourceforge.net/viewvc/webcalendar/webcalendar/ChangeLog?pathrev=REL_1_2
  • http://code.google.com/p/inspathx/source/browse/trunk/paths_vuln/WebCalendar-1.2.3
  • http://www.openwall.com/lists/oss-security/2011/06/27/6
  • http://code.google.com/p/inspathx/source/browse/trunk/paths_vuln/%21_README

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