Original Post: Demystifying Taint Mode
The blog post explains Semgrep’s taint mode, which is used to analyze code vulnerabilities by tracking the flow of potentially unsafe data across variables. Unlike search mode, which looks for specific patterns, taint mode is suited for scenarios where data can move through multiple variables, such as in injection vulnerabilities (e.g., XSS or SQL injection).
It offers guidance on when to use taint mode and how to write a taint mode rule. These rules include defining sources (pattern-sources), sinks (pattern-sinks), optional sanitizers (pattern-sanitizers for validating data), and propagators (pattern-propagators for when tainted data affects other data structures).
The post emphasizes that taint mode can make rules more succinct and readable by focusing on the flow of data rather than detailed steps, enhancing code security with precision.
Go here to read the Original Post