DOS Vector in J-BusinessDirectory Pagination Handling

Executive Summary

This vulnerability affects Joomla Extension J-BusinessDirectory versions before 6.2.3. It involves improper handling of pagination parameters where non-numeric or array values like limitstart[] can cause PHP type errors during arithmetic operations. The limit parameter is also not validated before use in database queries.

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Detection Guidance

Check if you are running J-BusinessDirectory versions prior to 6.2.3. Look for unusual PHP errors in logs related to pagination parameters like limitstart[] or non-numeric limit values. Monitor for type errors in arithmetic operations involving these parameters.

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Impact Analysis

An attacker could exploit this to trigger PHP errors or manipulate database queries, potentially causing denial of service or unauthorized data access. The high CVSS score indicates significant impact on availability and integrity.

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Compliance Impact

This vulnerability does not directly affect compliance with GDPR or HIPAA as it is a technical flaw in pagination parameter handling that could cause denial of service via PHP errors. However, if exploited, it could disrupt system availability, potentially impacting data processing operations relevant to compliance.

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Mitigation Strategies

Update J-BusinessDirectory to version 6.2.3 or later. If immediate update is not possible, validate and sanitize all pagination input parameters to ensure they are strictly numeric before processing.

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