Summary

The system must validate that the format (structure) of the files corresponds to their extension.

Description

This is a security measure that can be useful for validating the integrity and authenticity of files in a system or application. This process involves verifying that the actual content or format of a file matches the file extension it claims to have. Mismatches between file formats and extensions can indicate potential security risks or attempted attacks.

Supported In

This requirement is verified in following services

References

• CAPEC™-11. Cause web server misclassification
• CAPEC™-165. File manipulation
• CWE™-434. Unrestricted upload of file with dangerous type
• CWE™-646. Reliance on file name or extension of externally-supplied file
• SANS 25-10. Unrestricted upload of file with dangerous type
• WASSEC-6_2_4_10. Command execution - Potential malicious file uploads
• NIST SSDF-PS_3_1. Archive and protect each software release
• ISSAF-J_7_3_5. Network security - Anti-virus system (methodology)
• ISSAF-Q_16_27. Host security - Windows security (DLL injection attack)
• OWASP SCP-12. File management
• CWE TOP 25-434. Unrestricted upload of file with dangerous type
• NIST 800-115-3_6. File integrity checking
• OWASP ASVS-12_5_1. File download
• OWASP ASVS-12_5_2. File download

Vulnerabilities

• 027.Insecure file upload
• 354.Insecure file upload - Files Limit
• 413.Insecure file upload - DLL Injection

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