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Renamed to AndroidIntentRedirection
Added qhelp
1 parent 09d96e6 commit fd8a128

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Lines changed: 113 additions & 78 deletions

‎java/ql/src/Security/CWE/CWE-940/AndroidIntentRedirect.qhelp‎

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This file was deleted.

‎java/ql/src/Security/CWE/CWE-940/AndroidIntentRedirection.qhelp‎

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<!DOCTYPE qhelp PUBLIC "-//Semmle//qhelp//EN" "qhelp.dtd">
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<qhelp>
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<overview>
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<p>An exported Android component that obtains a user-provided Intent and uses it to launch another component
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can be exploited to obtain access to private, unexported components of the same app or to launch other apps' components
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in behalf of the victim app.</p>
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</overview>
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<recommendation>
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<p>Do not export compontents that start other components from a user-provided Intent.
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They can be made private by setting the `android:exported` property to `false` in the app's Android Manifest.</p>
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<p>If this is not possible, restrict either which apps can send Intents to the affected component, or which components can be started from it.</p>
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</recommendation>
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<example>
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<p>The following snippet contains two examples.
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In the first example, an arbitrary component can be started from the externally provided `forward_intent` Intent.
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In the second example, the destination component of the Intent is first checked to make sure it is safe.</p>
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<sample src="AndroidIntentRedirectionSample.java" />
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</example>
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<references>
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<li>
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Google:
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<a href="https://support.google.com/faqs/answer/9267555?hl=en">Remediation for Intent Redirection Vulnerability</a>.
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</li>
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<li>
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OWASP Mobile Security Testing Guide:
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<a href="https://mobile-security.gitbook.io/mobile-security-testing-guide/android-testing-guide/0x05a-platform-overview#intents">Intents</a>.
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</li>
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<li>
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Android Developers:
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<a href="https://developer.android.com/guide/topics/manifest/activity-element#exported">The `android:exported` attribute</a>.
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</li>
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</references>
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</qhelp>

java/ql/src/Security/CWE/CWE-940/AndroidIntentRedirect.ql renamed to java/ql/src/Security/CWE/CWE-940/AndroidIntentRedirection.ql

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/**
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* @name Android Intent redirect
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* @description xxx
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* @name Android Intent redirection
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* @description Starting Android components with user-provided Intents
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* can provide access to internal components of the application,
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* increasing the attack surface and potentially causing unintended effects.
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* @kind path-problem
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* @problem.severity error
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* @security-severity xx
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* @security-severity 7.5
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* @precision high
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* @id java/android/unsafe-android-webview-fetch
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* @id java/android/intent-redirection
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* @tags security
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* external/cwe/cwe-926
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* external/cwe/cwe-940
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*/
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import java
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import semmle.code.java.dataflow.DataFlow
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import semmle.code.java.security.AndroidIntentRedirectQuery
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import semmle.code.java.security.AndroidIntentRedirectionQuery
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import DataFlow::PathGraph
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from DataFlow::PathNode source, DataFlow::PathNode sink, IntentRedirectConfiguration conf
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from DataFlow::PathNode source, DataFlow::PathNode sink, IntentRedirectionConfiguration conf
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where conf.hasFlowPath(source, sink)
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select sink.getNode(), source, sink,
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"Arbitrary Android activities or services can be started from $@.", source.getNode(),

‎java/ql/src/Security/CWE/CWE-940/AndroidIntentRedirectionSample.java‎

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// BAD: A user-provided Intent is used to launch an arbitrary component
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Intent forwardIntent = (Intent) getIntent().getParcelableExtra("forward_intent");
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startActivity(forwardIntent);
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// GOOD: The destination component is checked before launching it
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Intent forwardIntent = (Intent) getIntent().getParcelableExtra("forward_intent");
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ComponentName destinationComponent = forwardIntent.resolveActivity(getPackageManager());
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if (destinationComponent.getPackageName().equals("safe.package") &&
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destinationComponent.getClassName().equals("SafeClass")) {
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startActivity(forwardIntent);
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}
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// GOOD: The component that sent the Intent is checked before launching the destination component
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Intent forwardIntent = (Intent) getIntent().getParcelableExtra("forward_intent");
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ComponentName originComponent = getCallingActivity();
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if (originComponent.getPackageName().equals("trusted.package") && originComponent.getClassName("TrustedClass")) {
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startActivity(forwardIntent);
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}

java/ql/src/semmle/code/java/security/AndroidIntentRedirect.qll renamed to java/ql/src/semmle/code/java/security/AndroidIntentRedirection.qll

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@@ -5,26 +5,26 @@ private import semmle.code.java.dataflow.DataFlow
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private import semmle.code.java.frameworks.android.Intent
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/**
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* A sink for Intent redirect vulnerabilities in Android,
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* A sink for Intent redirection vulnerabilities in Android,
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* that is, method calls that start Android components (like activities or services).
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*/
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abstract class IntentRedirectSink extends DataFlow::Node { }
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abstract class IntentRedirectionSink extends DataFlow::Node { }
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/** A sanitizer for data used to start an Android component. */
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abstract class IntentRedirectSanitizer extends DataFlow::Node { }
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abstract class IntentRedirectionSanitizer extends DataFlow::Node { }
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/**
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* A unit class for adding additional taint steps.
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*
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* Extend this class to add additional taint steps that should apply to `IntentRedirectConfiguration`.
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* Extend this class to add additional taint steps that should apply to `IntentRedirectionConfiguration`.
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*/
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class IntentRedirectAdditionalTaintStep extends Unit {
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class IntentRedirectionAdditionalTaintStep extends Unit {
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abstract predicate step(DataFlow::Node node1, DataFlow::Node node2);
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}
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/** Default sink for Intent redirect vulnerabilities. */
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private class DefaultIntentRedirectSink extends IntentRedirectSink {
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DefaultIntentRedirectSink() {
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/** Default sink for Intent redirection vulnerabilities. */
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private class DefaultIntentRedirectionSink extends IntentRedirectionSink {
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DefaultIntentRedirectionSink() {
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exists(MethodAccess ma, Method m |
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ma.getMethod() = m and
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this.asExpr() = ma.getAnArgument() and

java/ql/src/semmle/code/java/security/AndroidIntentRedirectQuery.qll renamed to java/ql/src/semmle/code/java/security/AndroidIntentRedirectionQuery.qll

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/** Provides taint tracking configurations to be used in Android Intent Redirect queries. */
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/** Provides taint tracking configurations to be used in Android Intent redirection queries. */
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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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import semmle.code.java.security.AndroidIntentRedirect
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import semmle.code.java.security.AndroidIntentRedirection
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/**
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* A taint tracking configuration for user-provided Intents being used to start Android components.
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*/
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class IntentRedirectConfiguration extends TaintTracking::Configuration {
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IntentRedirectConfiguration() { this = "IntentRedirectConfiguration" }
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class IntentRedirectionConfiguration extends TaintTracking::Configuration {
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IntentRedirectionConfiguration() { this = "IntentRedirectionConfiguration" }
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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 IntentRedirectSink }
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override predicate isSink(DataFlow::Node sink) { sink instanceof IntentRedirectionSink }
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override predicate isSanitizer(DataFlow::Node sanitizer) {
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sanitizer instanceof IntentRedirectSanitizer
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sanitizer instanceof IntentRedirectionSanitizer
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}
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2222
override predicate isAdditionalTaintStep(DataFlow::Node node1, DataFlow::Node node2) {
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any(IntentRedirectAdditionalTaintStep c).step(node1, node2)
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any(IntentRedirectionAdditionalTaintStep c).step(node1, node2)
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}
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}

java/ql/test/query-tests/security/CWE-940/AndroidIntentRedirectTest.expected renamed to java/ql/test/query-tests/security/CWE-940/AndroidIntentRedirectionTest.expected

File renamed without changes.

java/ql/test/query-tests/security/CWE-940/AndroidIntentRedirectTest.java renamed to java/ql/test/query-tests/security/CWE-940/AndroidIntentRedirectionTest.java

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import android.content.Intent;
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import android.os.Bundle;
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8-
public class AndroidIntentRedirectTest extends Activity {
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AndroidIntentRedirectTest(Context base) {
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public class AndroidIntentRedirectionTest extends Activity {
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AndroidIntentRedirectionTest(Context base) {
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super(base);
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}
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public void onCreate(Bundle savedInstanceState) {
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{
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Intent intent = (Intent) getIntent().getParcelableExtra("forward_intent");
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startActivities(new Intent[] {intent}); // $ hasAndroidIntentRedirect
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startActivities(new Intent[] {intent}, null); // $ hasAndroidIntentRedirect
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startActivity(intent); // $ hasAndroidIntentRedirect
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startActivity(intent, null); // $ hasAndroidIntentRedirect
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startActivityAsUser(intent, null); // $ hasAndroidIntentRedirect
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startActivityAsUser(intent, null, null); // $ hasAndroidIntentRedirect
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startActivityAsCaller(intent, null, false, 0); // $ hasAndroidIntentRedirect
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startActivityAsUserFromFragment(null, intent, 0, null, null); // $ hasAndroidIntentRedirect
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startActivityForResult(intent, 0); // $ hasAndroidIntentRedirect
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startActivityForResult(intent, 0, null); // $ hasAndroidIntentRedirect
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startActivityForResult(null, intent, 0, null); // $ hasAndroidIntentRedirect
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startActivityForResultAsUser(intent, null, 0, null, null); // $ hasAndroidIntentRedirect
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startActivityForResultAsUser(intent, 0, null, null); // $ hasAndroidIntentRedirect
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startActivityForResultAsUser(intent, 0, null); // $ hasAndroidIntentRedirect
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startActivities(new Intent[] {intent}); // $ hasAndroidIntentRedirection
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startActivities(new Intent[] {intent}, null); // $ hasAndroidIntentRedirection
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startActivity(intent); // $ hasAndroidIntentRedirection
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startActivity(intent, null); // $ hasAndroidIntentRedirection
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startActivityAsUser(intent, null); // $ hasAndroidIntentRedirection
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startActivityAsUser(intent, null, null); // $ hasAndroidIntentRedirection
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startActivityAsCaller(intent, null, false, 0); // $ hasAndroidIntentRedirection
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startActivityAsUserFromFragment(null, intent, 0, null, null); // $ hasAndroidIntentRedirection
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startActivityForResult(intent, 0); // $ hasAndroidIntentRedirection
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startActivityForResult(intent, 0, null); // $ hasAndroidIntentRedirection
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startActivityForResult(null, intent, 0, null); // $ hasAndroidIntentRedirection
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startActivityForResultAsUser(intent, null, 0, null, null); // $ hasAndroidIntentRedirection
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startActivityForResultAsUser(intent, 0, null, null); // $ hasAndroidIntentRedirection
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startActivityForResultAsUser(intent, 0, null); // $ hasAndroidIntentRedirection
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}
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{
3232
Intent intent = (Intent) getIntent().getParcelableExtra("forward_intent");
33-
startService(intent); // $ hasAndroidIntentRedirect
34-
startServiceAsUser(intent, null); // $ hasAndroidIntentRedirect
33+
startService(intent); // $ hasAndroidIntentRedirection
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startServiceAsUser(intent, null); // $ hasAndroidIntentRedirection
3535
}
3636
{
3737
Intent intent = (Intent) getIntent().getParcelableExtra("forward_intent");
38-
sendBroadcast(intent); // $ hasAndroidIntentRedirect
39-
sendBroadcast(intent, null); // $ hasAndroidIntentRedirect
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sendBroadcast(intent, null, null); // $ hasAndroidIntentRedirect
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sendBroadcast(intent, null, 0); // $ hasAndroidIntentRedirect
42-
sendBroadcastAsUser(intent, null); // $ hasAndroidIntentRedirect
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sendBroadcastAsUser(intent, null, null); // $ hasAndroidIntentRedirect
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sendBroadcastAsUser(intent, null, null, null); // $ hasAndroidIntentRedirect
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sendBroadcastAsUser(intent, null, null, 0); // $ hasAndroidIntentRedirect
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sendBroadcastAsUserMultiplePermissions(intent, null, null); // $ hasAndroidIntentRedirect
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sendStickyBroadcast(intent); // $ hasAndroidIntentRedirect
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sendStickyBroadcastAsUser(intent, null); // $ hasAndroidIntentRedirect
49-
sendStickyBroadcastAsUser(intent, null, null); // $ hasAndroidIntentRedirect
50-
sendStickyOrderedBroadcast(intent, null, null, 0, null, null); // $ hasAndroidIntentRedirect
51-
sendStickyOrderedBroadcastAsUser(intent, null, null, null, 0, null, null); // $ hasAndroidIntentRedirect
38+
sendBroadcast(intent); // $ hasAndroidIntentRedirection
39+
sendBroadcast(intent, null); // $ hasAndroidIntentRedirection
40+
sendBroadcast(intent, null, null); // $ hasAndroidIntentRedirection
41+
sendBroadcast(intent, null, 0); // $ hasAndroidIntentRedirection
42+
sendBroadcastAsUser(intent, null); // $ hasAndroidIntentRedirection
43+
sendBroadcastAsUser(intent, null, null); // $ hasAndroidIntentRedirection
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sendBroadcastAsUser(intent, null, null, null); // $ hasAndroidIntentRedirection
45+
sendBroadcastAsUser(intent, null, null, 0); // $ hasAndroidIntentRedirection
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sendBroadcastAsUserMultiplePermissions(intent, null, null); // $ hasAndroidIntentRedirection
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sendStickyBroadcast(intent); // $ hasAndroidIntentRedirection
48+
sendStickyBroadcastAsUser(intent, null); // $ hasAndroidIntentRedirection
49+
sendStickyBroadcastAsUser(intent, null, null); // $ hasAndroidIntentRedirection
50+
sendStickyOrderedBroadcast(intent, null, null, 0, null, null); // $ hasAndroidIntentRedirection
51+
sendStickyOrderedBroadcastAsUser(intent, null, null, null, 0, null, null); // $ hasAndroidIntentRedirection
5252
}
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5454
}

java/ql/test/query-tests/security/CWE-940/AndroidIntentRedirectTest.ql renamed to java/ql/test/query-tests/security/CWE-940/AndroidIntentRedirectionTest.ql

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11
import java
2-
import semmle.code.java.security.AndroidIntentRedirectQuery
2+
import semmle.code.java.security.AndroidIntentRedirectionQuery
33
import TestUtilities.InlineExpectationsTest
44

5-
class HasAndroidIntentRedirectTest extends InlineExpectationsTest {
6-
HasAndroidIntentRedirectTest() { this = "HasAndroidIntentRedirectTest" }
5+
class HasAndroidIntentRedirectionTest extends InlineExpectationsTest {
6+
HasAndroidIntentRedirectionTest() { this = "HasAndroidIntentRedirectionTest" }
77

8-
override string getARelevantTag() { result = "hasAndroidIntentRedirect" }
8+
override string getARelevantTag() { result = "hasAndroidIntentRedirection" }
99

1010
override predicate hasActualResult(Location location, string element, string tag, string value) {
11-
tag = "hasAndroidIntentRedirect" and
12-
exists(DataFlow::Node src, DataFlow::Node sink, IntentRedirectConfiguration conf |
11+
tag = "hasAndroidIntentRedirection" and
12+
exists(DataFlow::Node src, DataFlow::Node sink, IntentRedirectionConfiguration conf |
1313
conf.hasFlow(src, sink)
1414
|
1515
sink.getLocation() = location and

‎java/ql/test/query-tests/security/CWE-940/AndroidManifest.xml‎

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android:label="@string/app_name"
1010
android:theme="@style/AppTheme" >
1111
<activity
12-
android:name=".AndroidIntentRedirectTest"
12+
android:name=".AndroidIntentRedirectionTest"
1313
android:icon="@drawable/ic_launcher"
1414
android:label="@string/app_name">
1515
<intent-filter>

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