Archive of Anomalies
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Analysing Server Response and Page Source
Posted in AnomaliesSubtle impacts of SQL injection attacks on response. It is not always easy to tell if an inbound SQL injection test is positive or negative. Sometimes, a slight difference in the server response can indicate the attacker is on the right way. By carefully analysing the source code...
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Extracting Information from Custom Errors
Posted in AnomaliesUnderstanding information provided by application errors. Software developers often use error handling and validation mechanisms to prevent the application from crashing when an unexpected event occurs. In those situations custom errors are habitually returned to the user to indicate that something wrong happened (without providing full...
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Detecting SQL Injection Vulnerabilities from HTTP Errors
Posted in AnomaliesUnderstanding HTTP errors generated by SQL injection attacks. While testing for SQL injection vulnerabilities or attempting to take over a query, the attacker may face different HTTP status codes. Those responses may indicate that the SQL injection partially worked and therefore give precious hints to the tester. This...
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SQL Injection and Database Errors
Posted in AnomaliesUnderstand and identify database errors. Information leaked by errors, especially database errors, can help an attacker to achieve a successful SQL injection attack. They basically give hints to help crafting an SQL segment that will be correcly integrated in the query. It can also reveal...
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