CWE-756: Missing Custom Error Page
Learn about CWE-756 (Missing Custom Error Page), its security impact, exploitation methods, and prevention guidelines.
What is Missing Custom Error Page?
• Overview: Missing Custom Error Page (CWE-756) refers to a situation where an application fails to provide user-friendly error pages, potentially exposing internal system information or sensitive data through default error messages.
• Exploitation Methods:
- Attackers can exploit this vulnerability by deliberately causing errors in the application to view default error pages.
- Common attack patterns include sending malformed inputs, accessing non-existent resources, and probing application weaknesses to trigger error responses.
• Security Impact:
- Direct consequences include the exposure of stack traces, file paths, server configurations, and other sensitive information.
- Potential cascading effects involve attackers using leaked information to plan further, more sophisticated attacks.
- Business impact can include loss of customer trust, compliance violations, and increased risk of targeted attacks.
• Prevention Guidelines:
- Specific code-level fixes include implementing custom error handling mechanisms to catch and manage exceptions gracefully.
- Security best practices involve configuring web servers and application frameworks to return custom error pages for various HTTP error codes.
- Recommended tools and frameworks include using web application firewalls (WAFs) and security libraries that provide standardized error handling features.
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Technical Details
Likelihood of Exploit: Not specified
Affected Languages: Not specified
Affected Technologies: Not specified