Address FN involving CAP remote flow sources #222
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…ervice` - Extension to definitions: - Add an explicit case named `ExportedClosureApplicationServiceDefinition` of a `UserDefinedApplicationService` that is defined in the form of an exported function whose first parameter represents the service instance. - Add a definition `ServiceInstanceFromExportedClosureParameter` that matches above class. - Bug fixes: - Address a bug in the `UserDefinedApplicationService.isExposed/0` where a simple negation also captured cases where CDS declarations were missing. - Address a bug in the `HandlerParameterOfExposedService` where the trailing `.getCdsDeclaration()` was missing. NOTE: See issue #221 to learn more about the `HACK` block comment.
knewbury01
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Aug 25, 2025
javascript/frameworks/cap/lib/advanced_security/javascript/frameworks/cap/CDS.qll
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overall this looks really good to me! couple of small extra things
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@knewbury01 Additional cases are added to |
knewbury01
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Aug 26, 2025
jeongsoolee09
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What This PR Contributes
This PR fixes false negative cases where the current CAP remote flow source definition
UserProvidedPropertyReadOfHandlerParameterOfExposedServiceis missing detections from the code that comes in the following form:Two things are notable in the above case:
Unfortunately, the CodeQL Standard Library for JavaScript cannot detect the above
(srv) => { srv.on(...) }element due to some limitations (see issue #221). Therefore, we directly describe the above patternmodule.exports = (...) => { ... }as a hack around it.Other than that, the code changes include:
ExportedClosureApplicationServiceDefinitionof aUserDefinedApplicationServicethat is defined in the form of an exported function whose first parameter represents the service instance.ServiceInstanceFromExportedClosureParameterthat matches above class.UserDefinedApplicationService.isExposed/0where a simple negation also captured cases where CDS declarations were missing.HandlerParameterOfExposedServicewhere the trailing.getCdsDeclaration()was missing.Future Works
Remove the "hack around it" once the relevant portion of the library is patched and released.