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Refactor Security.CWE.CWE-022.TaintedPathLocal

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This commit is contained in:
Ed Minnix
2023-03-15 13:10:58 -04:00
parent dce81cf0ae
commit e60e1a2ba9
1 changed files with 12 additions and 11 deletions
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23
java/ql/src/Security/CWE/CWE-022/TaintedPathLocal.ql
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@@ -18,32 +18,33 @@ import semmle.code.java.dataflow.FlowSources
private import semmle.code.java.dataflow.ExternalFlow
import semmle.code.java.security.PathCreation
import semmle.code.java.security.PathSanitizer
import DataFlow::PathGraph
import TaintedPathCommon
class TaintedPathLocalConfig extends TaintTracking::Configuration {
TaintedPathLocalConfig() { this = "TaintedPathLocalConfig" }
private module TaintedPathLocalConfig implements DataFlow::ConfigSig {
predicate isSource(DataFlow::Node source) { source instanceof LocalUserInput }
override predicate isSource(DataFlow::Node source) { source instanceof LocalUserInput }
override predicate isSink(DataFlow::Node sink) {
predicate isSink(DataFlow::Node sink) {
sink.asExpr() = any(PathCreation p).getAnInput()
or
sinkNode(sink, "create-file")
}
override predicate isSanitizer(DataFlow::Node sanitizer) {
predicate isBarrier(DataFlow::Node sanitizer) {
sanitizer.getType() instanceof BoxedType or
sanitizer.getType() instanceof PrimitiveType or
sanitizer.getType() instanceof NumberType or
sanitizer instanceof PathInjectionSanitizer
}
override predicate isAdditionalTaintStep(DataFlow::Node n1, DataFlow::Node n2) {
predicate isAdditionalFlowStep(DataFlow::Node n1, DataFlow::Node n2) {
any(TaintedPathAdditionalTaintStep s).step(n1, n2)
}
}
module TaintedPathLocalFlow = TaintTracking::Make<TaintedPathLocalConfig>;
import TaintedPathLocalFlow::PathGraph
/**
* Gets the data-flow node at which to report a path ending at `sink`.
*
@@ -52,13 +53,13 @@ class TaintedPathLocalConfig extends TaintTracking::Configuration {
* continue to report there; otherwise we report directly at `sink`.
*/
DataFlow::Node getReportingNode(DataFlow::Node sink) {
any(TaintedPathLocalConfig c).hasFlowTo(sink) and
TaintedPathLocalFlow::hasFlowTo(sink) and
if exists(PathCreation pc | pc.getAnInput() = sink.asExpr())
then result.asExpr() = any(PathCreation pc | pc.getAnInput() = sink.asExpr())
else result = sink
}
from DataFlow::PathNode source, DataFlow::PathNode sink, TaintedPathLocalConfig conf
where conf.hasFlowPath(source, sink)
from TaintedPathLocalFlow::PathNode source, TaintedPathLocalFlow::PathNode sink
where TaintedPathLocalFlow::hasFlowPath(source, sink)
select getReportingNode(sink.getNode()), source, sink, "This path depends on a $@.",
source.getNode(), "user-provided value"