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JS: Port InsecureRandomness

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Asger F
2023-10-05 09:20:58 +02:00
parent 99f63b1cfa
commit cd1a1e25ae
3 changed files with 91 additions and 144 deletions
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32
javascript/ql/lib/semmle/javascript/security/dataflow/InsecureRandomnessQuery.qll
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@@ -15,7 +15,37 @@ private import InsecureRandomnessCustomizations::InsecureRandomness as InsecureR
/**
* A taint tracking configuration for random values that are not cryptographically secure.
*/
class Configuration extends TaintTracking::Configuration {
module InsecureRandomnessConfig implements DataFlow::ConfigSig {
predicate isSource(DataFlow::Node source) { source instanceof Source }
predicate isSink(DataFlow::Node sink) { sink instanceof Sink }
predicate isBarrier(DataFlow::Node node) { node instanceof Sanitizer }
predicate isBarrierOut(DataFlow::Node node) {
// stop propagation at the sinks to avoid double reporting
isSink(node)
}
predicate isAdditionalFlowStep(DataFlow::Node pred, DataFlow::Node succ) {
InsecureRandomness::isAdditionalTaintStep(pred, succ)
or
// We want to make use of default taint steps but not the default taint sanitizers, as they
// generally assume numbers aren't taintable. So we use a data-flow configuration that includes all
// taint steps as additional flow steps.
TaintTracking::defaultTaintStep(pred, succ)
}
}
/**
* Taint tracking for random values that are not cryptographically secure.
*/
module InsecureRandomnessFlow = DataFlow::Global<InsecureRandomnessConfig>;
/**
* DEPRECATED. Use the `InsecureRandomnessFlow` module instead.
*/
deprecated class Configuration extends TaintTracking::Configuration {
Configuration() { this = "InsecureRandomness" }
override predicate isSource(DataFlow::Node source) { source instanceof Source }