Ruby: configsig rb/stack-trace-exposure

Author: alexrford

ruby/ql/lib/codeql/ruby/security/StackTraceExposureQuery.qll

@@ -13,8 +13,9 @@ private import StackTraceExposureCustomizations::StackTraceExposure
 
 /**
  * A taint-tracking configuration for detecting "stack trace exposure" vulnerabilities.
+ * DEPRECATED: Use `StackTraceExposureFlow`
  */
-class Configuration extends TaintTracking::Configuration {
+deprecated class Configuration extends TaintTracking::Configuration {
   Configuration() { this = "StackTraceExposure" }
 
   override predicate isSource(DataFlow::Node source) { source instanceof Source }
@@ -23,3 +24,16 @@ class Configuration extends TaintTracking::Configuration {
 
   override predicate isSanitizer(DataFlow::Node node) { node instanceof Sanitizer }
 }
+
+private module StackTraceExposureConfig 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 }
+}
+
+/**
+ * Taint-tracking for detecting "stack trace exposure" vulnerabilities.
+ */
+module StackTraceExposureFlow = TaintTracking::Global<StackTraceExposureConfig>;

ruby/ql/src/queries/security/cwe-209/StackTraceExposure.ql

@@ -15,9 +15,9 @@
 
 import codeql.ruby.DataFlow
 import codeql.ruby.security.StackTraceExposureQuery
-import DataFlow::PathGraph
+import StackTraceExposureFlow::PathGraph
 
-from Configuration config, DataFlow::PathNode source, DataFlow::PathNode sink
-where config.hasFlowPath(source, sink)
+from StackTraceExposureFlow::PathNode source, StackTraceExposureFlow::PathNode sink
+where StackTraceExposureFlow::flowPath(source, sink)
 select sink.getNode(), source, sink, "$@ can be exposed to an external user.", source.getNode(),
   "Error information"