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codeql/python/ql/src/Security/CWE-295/RequestWithoutValidation.ql
2020-01-31 14:49:18 +01:00

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/**
* @name Request without certificate validation
* @description Making a request without certificate validation can allow man-in-the-middle attacks.
* @kind problem
* @problem.severity error
* @precision medium
* @id py/request-without-cert-validation
* @tags security
* external/cwe/cwe-295
*/
import python
import semmle.python.web.Http
FunctionObject requestFunction() { result = ModuleObject::named("requests").attr(httpVerbLower()) }
/** requests treats None as the default and all other "falsey" values as False */
predicate falseNotNone(Object o) { o.booleanValue() = false and not o = theNoneObject() }
from CallNode call, FunctionObject func, Object falsey, ControlFlowNode origin
where
func = requestFunction() and
func.getACall() = call and
falseNotNone(falsey) and
call.getArgByName("verify").refersTo(falsey, origin)
select call, "Call to $@ with verify=$@", func, "requests." + func.getName(), origin, "False"