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A classification of SQL injection attacking vector as of 2010. In computing, SQL injection is a code injection technique used to attack data-driven applications, in which malicious SQL statements are inserted into an entry field for execution (e.g. to dump the database contents to the attacker).
An SQL injection takes advantage of SQL syntax to inject malicious commands that can read or modify a database or compromise the meaning of the original query. [13] For example, consider a web page that has two text fields which allow users to enter a username and a password.
Injection exploits are computer exploits that use some input or data entry feature to introduce some kind of data or code that subverts the intended operation of the system. Usually these exploits exploit vulnerabilities resulting from insufficient data validation on input and so forth.
Example 3: legacy code may have been targeted for offline machines, but becomes vulnerable once network connectivity is added. Legacy code is not written with new problems in mind. For example, source code written in 1990 is likely to be prone to many code injection vulnerabilities, because most such problems were not widely understood at that ...
The program is then monitored for exceptions such as crashes, failing built-in code assertions, or potential memory leaks. Typically, fuzzers are used to test programs that take structured inputs. This structure is specified, such as in a file format or protocol and distinguishes valid from invalid input.
The implementation of exception handling in programming languages typically involves a fair amount of support from both a code generator and the runtime system accompanying a compiler. (It was the addition of exception handling to C++ that ended the useful lifetime of the original C++ compiler, Cfront. [18]) Two schemes are most common.
TOAD – A PL/SQL development environment with a Code xPert component that reports on general code efficiency as well as specific programming issues. Visual Expert – A PL/SQL code analysis tool [ 15 ] that reports on programming issues and helps understand and maintain complex code ( Impact Analysis , Source Code documentation , Call trees ...
Another classification is by the action against the vulnerable system; unauthorized data access, arbitrary code execution, and denial of service are examples. Exploitations are commonly categorized and named [ 9 ] [ 10 ] by the type of vulnerability they exploit (see vulnerabilities for a list) [ clarification needed ] , whether they are local ...