Master of Science (MS)
Web application systems today are at great risk from attackers. They use methods like cross-site scripting, SQL injection, and format string attacks to exploit vulnerabilities in an application. Standard techniques like static analysis, code audits seem to be inadequate in successfully combating attacks like these. Both the techniques point out the vulnerabilities before an application is run. However, static analysis may result in a higher rate of false positives, and code audits are time-consuming and costly. Hence, there is a need for reliable detection mechanisms.
Dynamic taint analysis offers an alternate solution — it marks the incoming data from the untrusted source as ‘tainted.’’ The flow of tainted data is tracked during the program execution. Whenever tainted data is used in a security-sensitive context, a proper action is taken. The execution may also be suspended depending upon the severity of the operation.