SQL Injection in Joomla Quiz Deluxe Component

Compliance Impact

The Joomla! Component Quiz Deluxe 3.7.4 vulnerability allows unauthenticated attackers to execute arbitrary SQL commands and extract sensitive information from the database.

Such unauthorized access to sensitive data could potentially lead to non-compliance with data protection regulations like GDPR or HIPAA, which require the protection of personal and sensitive information from unauthorized disclosure.

However, the provided information does not explicitly discuss the impact of this vulnerability on compliance with these or other common standards and regulations.

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Executive Summary

CVE-2017-20257 is an SQL injection vulnerability found in Joomla! Component Quiz Deluxe version 3.7.4. It allows unauthenticated attackers to execute arbitrary SQL commands by exploiting the 'ajaxaction.flag_question' task.

Attackers can inject malicious SQL code through the 'stu_quiz_id' or 'flag_quest' parameters, which lets them manipulate database queries and potentially extract sensitive information from the database.

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Impact Analysis

This vulnerability can have serious impacts including unauthorized access to sensitive data stored in the database.

Attackers can manipulate database queries, which may lead to data leakage or unauthorized data modification.

Because the vulnerability can be exploited without authentication, it poses a high risk to affected Joomla! websites using the Quiz Deluxe component.

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Detection Guidance

This SQL injection vulnerability in Joomla! Component Quiz Deluxe 3.7.4 can be detected by testing the vulnerable parameters 'stu_quiz_id' and 'flag_quest' in the 'ajaxaction.flag_question' task for SQL injection flaws.

One way to detect the vulnerability is to send crafted HTTP requests targeting these parameters and observe if the application responds with database errors or unexpected data, indicating SQL injection.

For example, you can use curl commands to test the parameters by injecting SQL payloads such as a single quote (') or SQL tautologies to see if the server response changes or returns errors.

• curl -G "http://target-site.com/index.php?option=com_quizdeluxe&task=ajaxaction.flag_question" --data-urlencode "stu_quiz_id=1'"
• curl -G "http://target-site.com/index.php?option=com_quizdeluxe&task=ajaxaction.flag_question" --data-urlencode "flag_quest=1'"

If the response contains SQL errors or abnormal output, it indicates the presence of the SQL injection vulnerability.

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Mitigation Strategies

To mitigate this SQL injection vulnerability in Joomla! Component Quiz Deluxe 3.7.4, immediate steps include:

• Apply any available patches or updates from the vendor that address this vulnerability.
• If no patch is available, consider disabling or restricting access to the vulnerable component or the 'ajaxaction.flag_question' task to prevent exploitation.
• Implement web application firewall (WAF) rules to detect and block malicious SQL injection attempts targeting the vulnerable parameters.
• Review and sanitize all user inputs in the application code to prevent SQL injection, especially for the 'stu_quiz_id' and 'flag_quest' parameters.

Monitoring logs for suspicious activity related to these parameters can also help in early detection and response.

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