![]() ![]() In this case the comment character serves to remove the trailing single-quote left over from the modified query. Notice the trailing pair of hyphens ( -), which specifies to most database servers that the remainder of the statement is to be treated asĪ comment and not executed. This type of attack allows the attacker to execute arbitrary commands Separated by semicolons, in databases that do allow batch execution, While this attack string results in an error in Oracle and otherĭatabase servers that do not allow the batch-execution of statements Multiple SQL statements separated by semicolons to be executed at once. Many database servers, including Microsoft® SQL Server 2000, allow Incorrect syntax near il' as the database tried to execute evil.Ī safe version of the above SQL statement could be coded in Java as: Select id, firstname, lastname from authors where firstname = 'evil'ex' and lastname ='newman' If one provided: Firstname: evil'ex and Lastname: Newman Select id, firstname, lastname from authors Real distinction between the control and data planes. This flaw depends on the fact that SQL makes no Minimal user base is likely to be subject to an attempted attack of thisĮssentially, the attack is accomplished by placing a meta character intoĭata input to then place SQL commands in the control plane, which did The flaw is easily detected, andĮasily exploited, and as such, any site or software package with even a
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