Time-Based Blind SQL Injection in Tainacan WordPress Plugin

Executive Summary

The Tainacan plugin for WordPress has a time-based blind SQL Injection vulnerability in the 'geoquery' parameter in all versions up to and including 1.0.3. This vulnerability arises because the plugin does not properly escape or prepare the user-supplied 'geoquery' parameter before including it in SQL queries.

As a result, unauthenticated attackers can append additional malicious SQL queries to the existing ones, potentially extracting sensitive information from the database.

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Detection Guidance

This vulnerability involves a time-based blind SQL Injection via the 'geoquery' parameter in the Tainacan WordPress plugin. Detection typically involves testing the 'geoquery' parameter for SQL injection vulnerabilities by sending specially crafted payloads and observing response delays or anomalies.

Common detection methods include using automated vulnerability scanners that support SQL injection testing or manual testing with tools like sqlmap targeting the 'geoquery' parameter.

Example command using sqlmap to test the 'geoquery' parameter on a vulnerable URL might be:

• sqlmap -u "http://example.com/wp-content/plugins/tainacan/?geoquery=1" --param=geoquery --technique=T --level=5 --risk=3

Replace "http://example.com/wp-content/plugins/tainacan/" with the actual URL of the target WordPress site. This command instructs sqlmap to test the 'geoquery' parameter using time-based techniques.

Additionally, monitoring logs for unusual or malformed requests to the 'geoquery' parameter or unexpected delays in responses can help detect exploitation attempts.

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Impact Analysis

This vulnerability allows unauthenticated attackers to perform SQL Injection attacks, which can lead to unauthorized extraction of sensitive data from the database.

Because the attack is time-based and blind, attackers can systematically retrieve information without direct feedback, making it possible to compromise confidential information stored by the plugin.

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Mitigation Strategies

To mitigate the SQL injection vulnerability in the Tainacan WordPress plugin, you should update the plugin to a version that includes the fix addressing the issue.

The fix involves proper validation and sanitization of the 'geoquery' parameter, including splitting and validating coordinate values, converting them to float, and using WordPress's database abstraction layer's prepare() method to safely insert values into SQL queries.

If updating is not immediately possible, consider disabling or restricting access to the vulnerable functionality related to geospatial queries until the patch can be applied.

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Compliance Impact

The vulnerability allows unauthenticated attackers to perform time-based blind SQL Injection via the 'geoquery' parameter, enabling extraction of sensitive information from the database.

Such unauthorized access to sensitive data can lead to non-compliance with data protection regulations and standards like GDPR and HIPAA, which require safeguarding personal and sensitive information against unauthorized access and breaches.

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