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41 lines
2.1 KiB
Diff
41 lines
2.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Will Leshner <wleshner@google.com>
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Date: Tue, 31 Oct 2023 13:23:08 -0700
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Subject: [PATCH] Fix vulnerability that allowed attackers to start arbitary
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activities
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Test: Flashed device and verified dream settings works as expected
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Test: Installed APK from bug and verified the dream didn't allow
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launching the inappropriate settings activity.
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Fixes: 300090204
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(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:6926fd15fb16c51468dde270bd61ee68772b8c14)
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Merged-In: I573040df84bf98a493b39f96c8581e4303206bac
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Change-Id: I573040df84bf98a493b39f96c8581e4303206bac
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---
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.../com/android/settingslib/dream/DreamBackend.java | 12 +++++++++++-
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1 file changed, 11 insertions(+), 1 deletion(-)
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diff --git a/packages/SettingsLib/src/com/android/settingslib/dream/DreamBackend.java b/packages/SettingsLib/src/com/android/settingslib/dream/DreamBackend.java
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index 3c0f6fe8ccbb..0b771580fff4 100644
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--- a/packages/SettingsLib/src/com/android/settingslib/dream/DreamBackend.java
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+++ b/packages/SettingsLib/src/com/android/settingslib/dream/DreamBackend.java
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@@ -332,7 +332,17 @@ public class DreamBackend {
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if (cn != null && cn.indexOf('/') < 0) {
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cn = resolveInfo.serviceInfo.packageName + "/" + cn;
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}
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- return cn == null ? null : ComponentName.unflattenFromString(cn);
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+ // Ensure that the component is from the same package as the dream service. If not,
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+ // treat the component as invalid and return null instead.
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+ final ComponentName result = cn != null ? ComponentName.unflattenFromString(cn) : null;
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+ if (result != null
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+ && !result.getPackageName().equals(resolveInfo.serviceInfo.packageName)) {
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+ Log.w(TAG,
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+ "Inconsistent package name in component: " + result.getPackageName()
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+ + ", should be: " + resolveInfo.serviceInfo.packageName);
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+ return null;
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+ }
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+ return result;
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}
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private static void logd(String msg, Object... args) {
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