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Python: Move experimental PossibleTimingAttackAgainstSensitiveInfo to new dataflow API

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Rasmus Wriedt Larsen
2023-08-25 17:23:50 +02:00
parent 5fd3594f5f
commit 1a4e8d9464
2 changed files with 10 additions and 29 deletions
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18
python/ql/src/experimental/Security/CWE-208/TimingAttackAgainstSensitiveInfo/PossibleTimingAttackAgainstSensitiveInfo.ql
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@@ -15,20 +15,22 @@ import python
import semmle.python.dataflow.new.DataFlow
import semmle.python.dataflow.new.TaintTracking
import experimental.semmle.python.security.TimingAttack
import DataFlow::PathGraph
/**
* A configuration tracing flow from obtaining a client Secret to a unsafe Comparison.
*/
class ClientSuppliedSecretConfig extends TaintTracking::Configuration {
ClientSuppliedSecretConfig() { this = "ClientSuppliedSecretConfig" }
private module PossibleTimingAttackAgainstSensitiveInfoConfig implements DataFlow::ConfigSig {
predicate isSource(DataFlow::Node source) { source instanceof SecretSource }
override predicate isSource(DataFlow::Node source) { source instanceof SecretSource }
override predicate isSink(DataFlow::Node sink) { sink instanceof NonConstantTimeComparisonSink }
predicate isSink(DataFlow::Node sink) { sink instanceof NonConstantTimeComparisonSink }
}
from ClientSuppliedSecretConfig config, DataFlow::PathNode source, DataFlow::PathNode sink
where config.hasFlowPath(source, sink)
module PossibleTimingAttackAgainstSensitiveInfoFlow =
TaintTracking::Global<PossibleTimingAttackAgainstSensitiveInfoConfig>;
import PossibleTimingAttackAgainstSensitiveInfoFlow::PathGraph
from PossibleTimingAttackAgainstSensitiveInfoFlow::PathNode source, PossibleTimingAttackAgainstSensitiveInfoFlow::PathNode sink
where PossibleTimingAttackAgainstSensitiveInfoFlow::flowPath(source, sink)
select sink.getNode(), source, sink, "Timing attack against $@ validation.", source.getNode(),
"client-supplied token"