![]() It is described using an AWS CloudFormation template (cf/sqli-tsting.yml). In order to facilitate reproducibility and ease demonstration, a PoC environment has been provided. ![]() ![]() SQLi BypassĮssentially, it was found that by utilizing an injection of the form EXPECTED_INPUT' select * from TARGET_TABLE- the ' ' is not properly mitigated (ostensibly by replacing the offending character with whitespace). However, it was found that individually, and in combination, both of these xforms fail to prevent injections when two independent queries are concatenated with a ' '. More specifically, the CMD_LINE TextTransformation will, among other actions, "Replace the following characters with a space:, "įurther, with respect to the URL_DECODE xform, one is instructed to, "Use this option to decode a URL-encoded value." If you specify a transformation, AWS WAF performs the transformation on FieldToMatch before inspecting a request for a match." AWS WAF Documentation for SQlInjectionMatchTuple ( ) states that, "Text transformations eliminate some of the unusual formatting that attackers use in web requests in an effort to bypass AWS WAF.
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