BaseFortify

Executive Summary

Electric Postgres Sync versions below 1.6.10 has an information disclosure flaw. Attackers can infer values of excluded columns by crafting subset where clause conditions against shape responses. Even if columns are not returned in responses, attackers can observe whether conditions match rows to deduce sensitive data, bypassing column-based access restrictions.

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Detection Guidance

This vulnerability involves information disclosure through crafted subset where clause conditions in Electric Postgres Sync versions below 1.6.10. To detect it, inspect application logs for unusual subset where clause patterns or repeated queries attempting to infer excluded column values. Check for anomalies in response times or data patterns that suggest attackers are probing for sensitive information.

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Impact Analysis

This vulnerability allows unauthorized users with limited access to infer sensitive data they are not permitted to see. It could lead to exposure of confidential information such as personal details, financial records, or other sensitive data stored in the database.

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Compliance Impact

This vulnerability could violate data protection regulations like GDPR and HIPAA by enabling unauthorized access to sensitive personal or health information. Organizations may face legal penalties, loss of trust, and reputational damage if such breaches occur due to insufficient data access controls.

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Mitigation Strategies

Immediately upgrade Electric Postgres Sync to version 1.6.10 or later to patch the vulnerability. Review and restrict access controls to ensure only authorized users can execute subset where clause queries. Monitor network traffic for suspicious query patterns and implement additional logging to detect potential exploitation attempts.

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