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Merge pull request #6001 from atorralba/atorralba/promote-mvel-injection
Java: Promote MVEL injection query from experimental
This commit is contained in:
Anders Schack-Mulligen
@@ -0,0 +1,25 @@
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public void evaluate(Socket socket) throws IOException {
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try (BufferedReader reader = new BufferedReader(
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new InputStreamReader(socket.getInputStream()))) {
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String expression = reader.readLine();
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// BAD: the user-provided expression is directly evaluated
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MVEL.eval(expression);
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}
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}
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public void safeEvaluate(Socket socket) throws IOException {
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try (BufferedReader reader = new BufferedReader(
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new InputStreamReader(socket.getInputStream()))) {
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String expression = reader.readLine();
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// GOOD: the user-provided expression is validated before evaluation
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validateExpression(expression);
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MVEL.eval(expression);
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}
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}
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private void validateExpression(String expression) {
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// Validate that the expression does not contain unexpected code.
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// For instance, this can be done with allow-lists or deny-lists of code patterns.
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}
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@@ -3,11 +3,11 @@
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<overview>
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<p>
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MVEL is an expression language based on Java-syntax.
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The language offers many features
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MVEL is an expression language based on Java-syntax,
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which offers many features
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including invocation of methods available in the JVM.
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If a MVEL expression is built using attacker-controlled data,
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and then evaluated, then it may allow the attacker to run arbitrary code.
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and then evaluated, then it may allow attackers to run arbitrary code.
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</p>
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</overview>
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@@ -19,10 +19,12 @@ Including user input in a MVEL expression should be avoided.
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<example>
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<p>
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The following example uses untrusted data to build a MVEL expression
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and then runs it in the default powerfull context.
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In the following sample, the first example uses untrusted data to build a MVEL expression
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and then runs it in the default context. In the second example, the untrusted data is
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validated with a custom method that checks that the expression does not contain unexpected code
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before evaluating it.
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</p>
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<sample src="UnsafeMvelExpressionEvaluation.java" />
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<sample src="MvelExpressionEvaluation.java" />
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</example>
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<references>
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@@ -35,4 +37,4 @@ and then runs it in the default powerfull context.
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<a href="https://owasp.org/www-community/vulnerabilities/Expression_Language_Injection">Expression Language Injection</a>.
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</li>
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</references>
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</qhelp>
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</qhelp>
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@@ -11,9 +11,9 @@
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*/
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import java
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import MvelInjectionLib
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import semmle.code.java.security.MvelInjectionQuery
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import DataFlow::PathGraph
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from DataFlow::PathNode source, DataFlow::PathNode sink, MvelInjectionConfig conf
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from DataFlow::PathNode source, DataFlow::PathNode sink, MvelInjectionFlowConfig conf
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where conf.hasFlowPath(source, sink)
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select sink.getNode(), source, sink, "MVEL injection from $@.", source.getNode(), "this user input"
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@@ -1,367 +0,0 @@
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import java
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import semmle.code.java.dataflow.FlowSources
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import semmle.code.java.dataflow.TaintTracking
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/**
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* A taint-tracking configuration for unsafe user input
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* that is used to construct and evaluate a MVEL expression.
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*/
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class MvelInjectionConfig extends TaintTracking::Configuration {
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MvelInjectionConfig() { this = "MvelInjectionConfig" }
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override predicate isSource(DataFlow::Node source) { source instanceof RemoteFlowSource }
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override predicate isSink(DataFlow::Node sink) { sink instanceof MvelEvaluationSink }
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override predicate isAdditionalTaintStep(DataFlow::Node node1, DataFlow::Node node2) {
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expressionCompilationStep(node1, node2) or
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createExpressionCompilerStep(node1, node2) or
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expressionCompilerCompileStep(node1, node2) or
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createCompiledAccExpressionStep(node1, node2) or
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scriptCompileStep(node1, node2) or
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createMvelCompiledScriptStep(node1, node2) or
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templateCompileStep(node1, node2) or
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createTemplateCompilerStep(node1, node2)
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}
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}
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/**
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* A sink for EL injection vulnerabilities via MVEL,
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* i.e. methods that run evaluation of a MVEL expression.
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*/
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class MvelEvaluationSink extends DataFlow::ExprNode {
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MvelEvaluationSink() {
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exists(StaticMethodAccess ma, Method m | m = ma.getMethod() |
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(
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m instanceof MvelEvalMethod or
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m instanceof TemplateRuntimeEvaluationMethod
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) and
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ma.getArgument(0) = asExpr()
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)
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or
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exists(MethodAccess ma, Method m | m = ma.getMethod() |
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m instanceof MvelScriptEngineEvaluationMethod and
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ma.getArgument(0) = asExpr()
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)
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or
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exists(MethodAccess ma, Method m | m = ma.getMethod() |
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(
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m instanceof ExecutableStatementEvaluationMethod or
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m instanceof CompiledExpressionEvaluationMethod or
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m instanceof CompiledAccExpressionEvaluationMethod or
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m instanceof AccessorEvaluationMethod or
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m instanceof CompiledScriptEvaluationMethod or
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m instanceof MvelCompiledScriptEvaluationMethod
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) and
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ma.getQualifier() = asExpr()
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)
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or
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exists(StaticMethodAccess ma, Method m | m = ma.getMethod() |
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m instanceof MvelRuntimeEvaluationMethod and
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ma.getArgument(1) = asExpr()
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)
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}
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}
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/**
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* Holds if `node1` to `node2` is a dataflow step that compiles a MVEL expression
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* by callilng `MVEL.compileExpression(tainted)`.
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*/
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predicate expressionCompilationStep(DataFlow::Node node1, DataFlow::Node node2) {
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exists(StaticMethodAccess ma, Method m | ma.getMethod() = m |
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m.getDeclaringType() instanceof MVEL and
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m.hasName("compileExpression") and
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ma.getAnArgument() = node1.asExpr() and
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node2.asExpr() = ma
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)
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}
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/**
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* Holds if `node1` to `node2` is a dataflow step creates `ExpressionCompiler`,
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* i.e. `new ExpressionCompiler(tainted)`.
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*/
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predicate createExpressionCompilerStep(DataFlow::Node node1, DataFlow::Node node2) {
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exists(ConstructorCall cc |
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cc.getConstructedType() instanceof ExpressionCompiler and
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cc = node2.asExpr() and
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cc.getArgument(0) = node1.asExpr()
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)
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}
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/**
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* Holds if `node1` to `node2` is a dataflow step creates `CompiledAccExpression`,
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* i.e. `new CompiledAccExpression(tainted, ...)`.
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*/
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predicate createCompiledAccExpressionStep(DataFlow::Node node1, DataFlow::Node node2) {
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exists(ConstructorCall cc |
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cc.getConstructedType() instanceof CompiledAccExpression and
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cc = node2.asExpr() and
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cc.getArgument(0) = node1.asExpr()
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)
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}
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/**
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* Holds if `node1` to `node2` is a dataflow step that compiles a MVEL expression
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* by calling `ExpressionCompiler.compile()`.
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*/
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predicate expressionCompilerCompileStep(DataFlow::Node node1, DataFlow::Node node2) {
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exists(MethodAccess ma, Method m | ma.getMethod() = m |
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m.getDeclaringType() instanceof ExpressionCompiler and
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m.hasName("compile") and
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ma = node2.asExpr() and
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ma.getQualifier() = node1.asExpr()
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)
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}
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/**
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* Holds if `node1` to `node2` is a dataflow step that compiles a script via `MvelScriptEngine`,
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* i.e. `engine.compile(tainted)` or `engine.compiledScript(tainted)`.
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*/
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predicate scriptCompileStep(DataFlow::Node node1, DataFlow::Node node2) {
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exists(MethodAccess ma, Method m | ma.getMethod() = m |
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m instanceof MvelScriptEngineCompilationMethod and
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ma = node2.asExpr() and
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ma.getArgument(0) = node1.asExpr()
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)
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}
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/**
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* Holds if `node1` to `node2` is a dataflow step creates `MvelCompiledScript`,
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* i.e. `new MvelCompiledScript(engine, tainted)`.
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*/
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predicate createMvelCompiledScriptStep(DataFlow::Node node1, DataFlow::Node node2) {
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exists(ConstructorCall cc |
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cc.getConstructedType() instanceof MvelCompiledScript and
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cc = node2.asExpr() and
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cc.getArgument(1) = node1.asExpr()
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)
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}
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/**
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* Holds if `node1` to `node2` is a dataflow step creates `TemplateCompiler`,
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* i.e. `new TemplateCompiler(tainted)`.
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*/
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predicate createTemplateCompilerStep(DataFlow::Node node1, DataFlow::Node node2) {
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exists(ConstructorCall cc |
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cc.getConstructedType() instanceof TemplateCompiler and
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cc = node2.asExpr() and
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cc.getArgument(0) = node1.asExpr()
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)
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}
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/**
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* Holds if `node1` to `node2` is a dataflow step that compiles a script via `TemplateCompiler`,
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* i.e. `compiler.compile()` or `TemplateCompiler.compileTemplate(tainted)`.
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*/
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predicate templateCompileStep(DataFlow::Node node1, DataFlow::Node node2) {
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exists(MethodAccess ma, Method m | ma.getMethod() = m |
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m instanceof TemplateCompilerCompileMethod and
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ma.getQualifier() = node1.asExpr() and
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ma = node2.asExpr()
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)
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or
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exists(StaticMethodAccess ma, Method m | ma.getMethod() = m |
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m instanceof TemplateCompilerCompileTemplateMethod and
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ma = node2.asExpr() and
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ma.getArgument(0) = node1.asExpr()
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)
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}
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/**
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* Methods in the MVEL class that evaluate a MVEL expression.
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*/
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class MvelEvalMethod extends Method {
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MvelEvalMethod() {
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getDeclaringType() instanceof MVEL and
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(
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hasName("eval") or
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hasName("executeExpression") or
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hasName("evalToBoolean") or
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hasName("evalToString") or
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hasName("executeAllExpression") or
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hasName("executeSetExpression")
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)
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}
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}
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/**
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* Methods in `MVEL` class that compile a MVEL expression.
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*/
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class MvelCompileExpressionMethod extends Method {
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MvelCompileExpressionMethod() {
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getDeclaringType() instanceof MVEL and
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(
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hasName("compileExpression") or
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hasName("compileGetExpression") or
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hasName("compileSetExpression")
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)
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}
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}
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/**
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* Methods in `ExecutableStatement` that evaluate a MVEL expression.
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*/
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class ExecutableStatementEvaluationMethod extends Method {
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ExecutableStatementEvaluationMethod() {
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getDeclaringType() instanceof ExecutableStatement and
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hasName("getValue")
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}
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}
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/**
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* Methods in `CompiledExpression` that evaluate a MVEL expression.
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*/
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class CompiledExpressionEvaluationMethod extends Method {
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CompiledExpressionEvaluationMethod() {
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getDeclaringType() instanceof CompiledExpression and
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hasName("getDirectValue")
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}
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}
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/**
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* Methods in `CompiledAccExpression` that evaluate a MVEL expression.
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*/
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class CompiledAccExpressionEvaluationMethod extends Method {
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CompiledAccExpressionEvaluationMethod() {
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getDeclaringType() instanceof CompiledAccExpression and
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hasName("getValue")
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}
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}
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/**
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* Methods in `Accessor` that evaluate a MVEL expression.
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*/
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class AccessorEvaluationMethod extends Method {
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AccessorEvaluationMethod() {
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getDeclaringType() instanceof Accessor and
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hasName("getValue")
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}
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}
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/**
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* Methods in `MvelScriptEngine` that evaluate a MVEL expression.
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*/
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class MvelScriptEngineEvaluationMethod extends Method {
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MvelScriptEngineEvaluationMethod() {
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getDeclaringType() instanceof MvelScriptEngine and
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(hasName("eval") or hasName("evaluate"))
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}
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}
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/**
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* Methods in `MvelScriptEngine` that compile a MVEL expression.
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*/
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class MvelScriptEngineCompilationMethod extends Method {
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MvelScriptEngineCompilationMethod() {
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getDeclaringType() instanceof MvelScriptEngine and
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(hasName("compile") or hasName("compiledScript"))
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}
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}
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/**
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* Methods in `CompiledScript` that evaluate a MVEL expression.
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*/
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class CompiledScriptEvaluationMethod extends Method {
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CompiledScriptEvaluationMethod() {
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getDeclaringType() instanceof CompiledScript and
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hasName("eval")
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}
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}
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/**
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* Methods in `TemplateRuntime` that evaluate a MVEL template.
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*/
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class TemplateRuntimeEvaluationMethod extends Method {
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TemplateRuntimeEvaluationMethod() {
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getDeclaringType() instanceof TemplateRuntime and
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(hasName("eval") or hasName("execute"))
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}
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}
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/**
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* `TemplateCompiler.compile()` method compiles a MVEL template.
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*/
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class TemplateCompilerCompileMethod extends Method {
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TemplateCompilerCompileMethod() {
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getDeclaringType() instanceof TemplateCompiler and
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hasName("compile")
|
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}
|
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}
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/**
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* `TemplateCompiler.compileTemplate(tainted)` static method compiles a MVEL template.
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*/
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class TemplateCompilerCompileTemplateMethod extends Method {
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TemplateCompilerCompileTemplateMethod() {
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getDeclaringType() instanceof TemplateCompiler and
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hasName("compileTemplate")
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}
|
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}
|
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|
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/**
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* Methods in `MvelCompiledScript` that evaluate a MVEL expression.
|
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*/
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class MvelCompiledScriptEvaluationMethod extends Method {
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MvelCompiledScriptEvaluationMethod() {
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getDeclaringType() instanceof MvelCompiledScript and
|
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hasName("eval")
|
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}
|
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}
|
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|
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/**
|
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* Methods in `MVELRuntime` that evaluate a MVEL expression.
|
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*/
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class MvelRuntimeEvaluationMethod extends Method {
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MvelRuntimeEvaluationMethod() {
|
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getDeclaringType() instanceof MVELRuntime and
|
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hasName("execute")
|
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}
|
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}
|
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|
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class MVEL extends RefType {
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MVEL() { hasQualifiedName("org.mvel2", "MVEL") }
|
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}
|
||||
|
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class ExpressionCompiler extends RefType {
|
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ExpressionCompiler() { hasQualifiedName("org.mvel2.compiler", "ExpressionCompiler") }
|
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}
|
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|
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class ExecutableStatement extends RefType {
|
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ExecutableStatement() { hasQualifiedName("org.mvel2.compiler", "ExecutableStatement") }
|
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}
|
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|
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class CompiledExpression extends RefType {
|
||||
CompiledExpression() { hasQualifiedName("org.mvel2.compiler", "CompiledExpression") }
|
||||
}
|
||||
|
||||
class CompiledAccExpression extends RefType {
|
||||
CompiledAccExpression() { hasQualifiedName("org.mvel2.compiler", "CompiledAccExpression") }
|
||||
}
|
||||
|
||||
class Accessor extends RefType {
|
||||
Accessor() { hasQualifiedName("org.mvel2.compiler", "Accessor") }
|
||||
}
|
||||
|
||||
class CompiledScript extends RefType {
|
||||
CompiledScript() { hasQualifiedName("javax.script", "CompiledScript") }
|
||||
}
|
||||
|
||||
class MvelScriptEngine extends RefType {
|
||||
MvelScriptEngine() { hasQualifiedName("org.mvel2.jsr223", "MvelScriptEngine") }
|
||||
}
|
||||
|
||||
class MvelCompiledScript extends RefType {
|
||||
MvelCompiledScript() { hasQualifiedName("org.mvel2.jsr223", "MvelCompiledScript") }
|
||||
}
|
||||
|
||||
class TemplateRuntime extends RefType {
|
||||
TemplateRuntime() { hasQualifiedName("org.mvel2.templates", "TemplateRuntime") }
|
||||
}
|
||||
|
||||
class TemplateCompiler extends RefType {
|
||||
TemplateCompiler() { hasQualifiedName("org.mvel2.templates", "TemplateCompiler") }
|
||||
}
|
||||
|
||||
class MVELRuntime extends RefType {
|
||||
MVELRuntime() { hasQualifiedName("org.mvel2", "MVELRuntime") }
|
||||
}
|
||||
@@ -1,8 +0,0 @@
|
||||
public void evaluate(Socket socket) throws IOException {
|
||||
try (BufferedReader reader = new BufferedReader(
|
||||
new InputStreamReader(socket.getInputStream()))) {
|
||||
|
||||
String expression = reader.readLine();
|
||||
MVEL.eval(expression);
|
||||
}
|
||||
}
|
||||
@@ -98,6 +98,7 @@ private module Frameworks {
|
||||
private import semmle.code.java.security.InformationLeak
|
||||
private import semmle.code.java.security.JexlInjectionSinkModels
|
||||
private import semmle.code.java.security.LdapInjection
|
||||
private import semmle.code.java.security.MvelInjection
|
||||
private import semmle.code.java.security.XPath
|
||||
private import semmle.code.java.frameworks.android.SQLite
|
||||
private import semmle.code.java.frameworks.Jdbc
|
||||
|
||||
233
java/ql/src/semmle/code/java/security/MvelInjection.qll
Normal file
233
java/ql/src/semmle/code/java/security/MvelInjection.qll
Normal file
@@ -0,0 +1,233 @@
|
||||
/** Provides classes to reason about MVEL injection attacks. */
|
||||
|
||||
import java
|
||||
private import semmle.code.java.dataflow.DataFlow
|
||||
private import semmle.code.java.dataflow.ExternalFlow
|
||||
|
||||
/** A data flow sink for unvalidated user input that is used to construct MVEL expressions. */
|
||||
abstract class MvelEvaluationSink extends DataFlow::Node { }
|
||||
|
||||
/** A sanitizer that prevents MVEL injection attacks. */
|
||||
abstract class MvelInjectionSanitizer extends DataFlow::Node { }
|
||||
|
||||
/**
|
||||
* A unit class for adding additional taint steps.
|
||||
*
|
||||
* Extend this class to add additional taint steps that should apply to the `MvelInjectionFlowConfig`.
|
||||
*/
|
||||
class MvelInjectionAdditionalTaintStep extends Unit {
|
||||
/**
|
||||
* Holds if the step from `node1` to `node2` should be considered a taint
|
||||
* step for the `MvelInjectionFlowConfig` configuration.
|
||||
*/
|
||||
abstract predicate step(DataFlow::Node n1, DataFlow::Node n2);
|
||||
}
|
||||
|
||||
/** Default sink for MVEL injection vulnerabilities. */
|
||||
private class DefaultMvelEvaluationSink extends MvelEvaluationSink {
|
||||
DefaultMvelEvaluationSink() { sinkNode(this, "mvel") }
|
||||
}
|
||||
|
||||
private class DefaulMvelEvaluationSinkModel extends SinkModelCsv {
|
||||
override predicate row(string row) {
|
||||
row =
|
||||
[
|
||||
"javax.script;CompiledScript;false;eval;;;Argument[-1];mvel",
|
||||
"org.mvel2;MVEL;false;eval;;;Argument[0];mvel",
|
||||
"org.mvel2;MVEL;false;executeExpression;;;Argument[0];mvel",
|
||||
"org.mvel2;MVEL;false;evalToBoolean;;;Argument[0];mvel",
|
||||
"org.mvel2;MVEL;false;evalToString;;;Argument[0];mvel",
|
||||
"org.mvel2;MVEL;false;executeAllExpression;;;Argument[0];mvel",
|
||||
"org.mvel2;MVEL;false;executeSetExpression;;;Argument[0];mvel",
|
||||
"org.mvel2;MVELRuntime;false;execute;;;Argument[1];mvel",
|
||||
"org.mvel2.templates;TemplateRuntime;false;eval;;;Argument[0];mvel",
|
||||
"org.mvel2.templates;TemplateRuntime;false;execute;;;Argument[0];mvel",
|
||||
"org.mvel2.jsr223;MvelScriptEngine;false;eval;;;Argument[0];mvel",
|
||||
"org.mvel2.jsr223;MvelScriptEngine;false;evaluate;;;Argument[0];mvel",
|
||||
"org.mvel2.jsr223;MvelCompiledScript;false;eval;;;Argument[-1];mvel",
|
||||
"org.mvel2.compiler;ExecutableStatement;false;getValue;;;Argument[-1];mvel",
|
||||
"org.mvel2.compiler;CompiledExpression;false;getDirectValue;;;Argument[-1];mvel",
|
||||
"org.mvel2.compiler;CompiledAccExpression;false;getValue;;;Argument[-1];mvel",
|
||||
"org.mvel2.compiler;Accessor;false;getValue;;;Argument[-1];mvel"
|
||||
]
|
||||
}
|
||||
}
|
||||
|
||||
/** A default sanitizer that considers numeric and boolean typed data safe for building MVEL expressions */
|
||||
private class DefaultMvelInjectionSanitizer extends MvelInjectionSanitizer {
|
||||
DefaultMvelInjectionSanitizer() {
|
||||
this.getType() instanceof NumericType or this.getType() instanceof BooleanType
|
||||
}
|
||||
}
|
||||
|
||||
/** A set of additional taint steps to consider when taint tracking MVEL related data flows. */
|
||||
private class DefaultMvelInjectionAdditionalTaintStep extends MvelInjectionAdditionalTaintStep {
|
||||
override predicate step(DataFlow::Node node1, DataFlow::Node node2) {
|
||||
expressionCompilationStep(node1, node2) or
|
||||
createExpressionCompilerStep(node1, node2) or
|
||||
expressionCompilerCompileStep(node1, node2) or
|
||||
createCompiledAccExpressionStep(node1, node2) or
|
||||
scriptCompileStep(node1, node2) or
|
||||
createMvelCompiledScriptStep(node1, node2) or
|
||||
templateCompileStep(node1, node2) or
|
||||
createTemplateCompilerStep(node1, node2)
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Holds if `node1` to `node2` is a dataflow step that compiles a MVEL expression
|
||||
* by callilng `MVEL.compileExpression(tainted)`.
|
||||
*/
|
||||
private predicate expressionCompilationStep(DataFlow::Node node1, DataFlow::Node node2) {
|
||||
exists(StaticMethodAccess ma, Method m | ma.getMethod() = m |
|
||||
m.getDeclaringType() instanceof MVEL and
|
||||
m.hasName("compileExpression") and
|
||||
ma.getAnArgument() = node1.asExpr() and
|
||||
node2.asExpr() = ma
|
||||
)
|
||||
}
|
||||
|
||||
/**
|
||||
* Holds if `node1` to `node2` is a dataflow step that creates `ExpressionCompiler`
|
||||
* by calling `new ExpressionCompiler(tainted)`.
|
||||
*/
|
||||
private predicate createExpressionCompilerStep(DataFlow::Node node1, DataFlow::Node node2) {
|
||||
exists(ConstructorCall cc |
|
||||
cc.getConstructedType() instanceof ExpressionCompiler and
|
||||
cc = node2.asExpr() and
|
||||
cc.getArgument(0) = node1.asExpr()
|
||||
)
|
||||
}
|
||||
|
||||
/**
|
||||
* Holds if `node1` to `node2` is a dataflow step creates `CompiledAccExpression`
|
||||
* by calling `new CompiledAccExpression(tainted, ...)`.
|
||||
*/
|
||||
private predicate createCompiledAccExpressionStep(DataFlow::Node node1, DataFlow::Node node2) {
|
||||
exists(ConstructorCall cc |
|
||||
cc.getConstructedType() instanceof CompiledAccExpression and
|
||||
cc = node2.asExpr() and
|
||||
cc.getArgument(0) = node1.asExpr()
|
||||
)
|
||||
}
|
||||
|
||||
/**
|
||||
* Holds if `node1` to `node2` is a dataflow step that compiles a MVEL expression
|
||||
* by calling `ExpressionCompiler.compile()`.
|
||||
*/
|
||||
private predicate expressionCompilerCompileStep(DataFlow::Node node1, DataFlow::Node node2) {
|
||||
exists(MethodAccess ma, Method m | ma.getMethod() = m |
|
||||
m.getDeclaringType() instanceof ExpressionCompiler and
|
||||
m.hasName("compile") and
|
||||
ma = node2.asExpr() and
|
||||
ma.getQualifier() = node1.asExpr()
|
||||
)
|
||||
}
|
||||
|
||||
/**
|
||||
* Holds if `node1` to `node2` is a dataflow step that compiles a script via `MvelScriptEngine`
|
||||
* by calling `engine.compile(tainted)` or `engine.compiledScript(tainted)`.
|
||||
*/
|
||||
private predicate scriptCompileStep(DataFlow::Node node1, DataFlow::Node node2) {
|
||||
exists(MethodAccess ma, Method m | ma.getMethod() = m |
|
||||
m instanceof MvelScriptEngineCompilationMethod and
|
||||
ma = node2.asExpr() and
|
||||
ma.getArgument(0) = node1.asExpr()
|
||||
)
|
||||
}
|
||||
|
||||
/**
|
||||
* Holds if `node1` to `node2` is a dataflow step that creates `MvelCompiledScript`
|
||||
* by calling `new MvelCompiledScript(engine, tainted)`.
|
||||
*/
|
||||
private predicate createMvelCompiledScriptStep(DataFlow::Node node1, DataFlow::Node node2) {
|
||||
exists(ConstructorCall cc |
|
||||
cc.getConstructedType() instanceof MvelCompiledScript and
|
||||
cc = node2.asExpr() and
|
||||
cc.getArgument(1) = node1.asExpr()
|
||||
)
|
||||
}
|
||||
|
||||
/**
|
||||
* Holds if `node1` to `node2` is a dataflow step creates `TemplateCompiler`
|
||||
* by calling `new TemplateCompiler(tainted)`.
|
||||
*/
|
||||
private predicate createTemplateCompilerStep(DataFlow::Node node1, DataFlow::Node node2) {
|
||||
exists(ConstructorCall cc |
|
||||
cc.getConstructedType() instanceof TemplateCompiler and
|
||||
cc = node2.asExpr() and
|
||||
cc.getArgument(0) = node1.asExpr()
|
||||
)
|
||||
}
|
||||
|
||||
/**
|
||||
* Holds if `node1` to `node2` is a dataflow step that compiles a script via `TemplateCompiler`
|
||||
* by calling `compiler.compile()` or `TemplateCompiler.compileTemplate(tainted)`.
|
||||
*/
|
||||
private predicate templateCompileStep(DataFlow::Node node1, DataFlow::Node node2) {
|
||||
exists(MethodAccess ma, Method m | ma.getMethod() = m |
|
||||
m instanceof TemplateCompilerCompileMethod and
|
||||
ma.getQualifier() = node1.asExpr() and
|
||||
ma = node2.asExpr()
|
||||
)
|
||||
or
|
||||
exists(StaticMethodAccess ma, Method m | ma.getMethod() = m |
|
||||
m instanceof TemplateCompilerCompileTemplateMethod and
|
||||
ma = node2.asExpr() and
|
||||
ma.getArgument(0) = node1.asExpr()
|
||||
)
|
||||
}
|
||||
|
||||
/**
|
||||
* Methods in `MvelScriptEngine` that compile a MVEL expression.
|
||||
*/
|
||||
private class MvelScriptEngineCompilationMethod extends Method {
|
||||
MvelScriptEngineCompilationMethod() {
|
||||
getDeclaringType() instanceof MvelScriptEngine and
|
||||
hasName(["compile", "compiledScript"])
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* `TemplateCompiler.compile()` method that compiles a MVEL template.
|
||||
*/
|
||||
private class TemplateCompilerCompileMethod extends Method {
|
||||
TemplateCompilerCompileMethod() {
|
||||
getDeclaringType() instanceof TemplateCompiler and
|
||||
hasName("compile")
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* `TemplateCompiler.compileTemplate(tainted)` static method that compiles a MVEL template.
|
||||
*/
|
||||
private class TemplateCompilerCompileTemplateMethod extends Method {
|
||||
TemplateCompilerCompileTemplateMethod() {
|
||||
getDeclaringType() instanceof TemplateCompiler and
|
||||
hasName("compileTemplate")
|
||||
}
|
||||
}
|
||||
|
||||
private class MVEL extends RefType {
|
||||
MVEL() { hasQualifiedName("org.mvel2", "MVEL") }
|
||||
}
|
||||
|
||||
private class ExpressionCompiler extends RefType {
|
||||
ExpressionCompiler() { hasQualifiedName("org.mvel2.compiler", "ExpressionCompiler") }
|
||||
}
|
||||
|
||||
private class CompiledAccExpression extends RefType {
|
||||
CompiledAccExpression() { hasQualifiedName("org.mvel2.compiler", "CompiledAccExpression") }
|
||||
}
|
||||
|
||||
private class MvelScriptEngine extends RefType {
|
||||
MvelScriptEngine() { hasQualifiedName("org.mvel2.jsr223", "MvelScriptEngine") }
|
||||
}
|
||||
|
||||
private class MvelCompiledScript extends RefType {
|
||||
MvelCompiledScript() { hasQualifiedName("org.mvel2.jsr223", "MvelCompiledScript") }
|
||||
}
|
||||
|
||||
private class TemplateCompiler extends RefType {
|
||||
TemplateCompiler() { hasQualifiedName("org.mvel2.templates", "TemplateCompiler") }
|
||||
}
|
||||
26
java/ql/src/semmle/code/java/security/MvelInjectionQuery.qll
Normal file
26
java/ql/src/semmle/code/java/security/MvelInjectionQuery.qll
Normal file
@@ -0,0 +1,26 @@
|
||||
/** Provides taint tracking configurations to be used in MVEL injection related queries. */
|
||||
|
||||
import java
|
||||
import semmle.code.java.dataflow.FlowSources
|
||||
import semmle.code.java.dataflow.TaintTracking
|
||||
import semmle.code.java.security.MvelInjection
|
||||
|
||||
/**
|
||||
* A taint-tracking configuration for unsafe user input
|
||||
* that is used to construct and evaluate a MVEL expression.
|
||||
*/
|
||||
class MvelInjectionFlowConfig extends TaintTracking::Configuration {
|
||||
MvelInjectionFlowConfig() { this = "MvelInjectionFlowConfig" }
|
||||
|
||||
override predicate isSource(DataFlow::Node source) { source instanceof RemoteFlowSource }
|
||||
|
||||
override predicate isSink(DataFlow::Node sink) { sink instanceof MvelEvaluationSink }
|
||||
|
||||
override predicate isSanitizer(DataFlow::Node sanitizer) {
|
||||
sanitizer instanceof MvelInjectionSanitizer
|
||||
}
|
||||
|
||||
override predicate isAdditionalTaintStep(DataFlow::Node node1, DataFlow::Node node2) {
|
||||
any(MvelInjectionAdditionalTaintStep c).step(node1, node2)
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user