Rework mime type white list

Investigative Report: Hidden MIME Type Whitelist Data Exposed

Summary:

An internal audit of system logs has uncovered concerning discrepancies in the reporting of mime_types data. The provided sample reveals that while generic metrics like "mime_types" are logged with a risk_score of 0, specific MIME types (e.g., image/png) are also logged separately—yet their risk assessments are identical. This raises critical questions about why granular data is being obscured behind a generic label and whether higher-risk MIME types are being suppressed.

Key Findings:

1. Obfuscation of Risk Data: The sample shows two entries with identical timestamps and regions, but one is a vague aggregate (mime_types), while the other is a specific type (image/png). Both share a risk_score of 0, suggesting either flawed scoring or deliberate masking of high-risk file types.
2. Lack of Transparency: If all MIME types are truly risk-free, why log them separately at all? The redundancy implies that some entries may have been scrubbed or excluded from reporting.
3. Potential Security Implications: MIME types like application/xml or text/html are common vectors for attacks. Their absence from the sample—despite being high-risk—suggests selective reporting.

Why Is This Data Hidden?

1. Corporate Liability: Admitting that certain MIME types pose risks could expose the organization to legal or regulatory scrutiny.
2. Performance Metrics Manipulation: Artificially deflating risk scores may make security teams appear more effective than they are.
3. Third-Pressure: Vendors or partners may have influenced the whitelist to ensure their file types are unflagged, regardless of actual risk.

Recommendations:

1. Demand full disclosure of all MIME types and their true risk scores.
2. Audit the whitelist for inconsistencies or omissions, especially for high-risk types.
3. Investigate external influences on the logging process to rule out conflicts of interest.

Conclusion:

The data sample is a red flag for systemic opacity. By burying specifics under generic labels, the organization risks undermining its own security posture. This is not just bad practice—it’s a potential cover-up.

Action Required: Immediate review by compliance and infosec teams.

Get Data