mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
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62 lines
2.8 KiB
Diff
62 lines
2.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Grace Jia <xiaotonj@google.com>
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Date: Thu, 22 Sep 2022 14:20:57 -0700
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Subject: [PATCH] Fix security vulnerability when register phone accounts.
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Currently if the registered self-managed phone account updated to a call
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provider phone account, the enable state will be directly copied to the
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updated one so that malicious app can perform call spoofing attack
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without any permission requirements. Fix this by disallowing change a
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self-managed phone account to a managed phone account.
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Bug: 246930197
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Test: CtsTelecomTestCases:SelfManagedConnectionSreviceTest
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Change-Id: I8f7984cd491632b3219133044438b82ca4dec80e
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Merged-In: I8f7984cd491632b3219133044438b82ca4dec80e
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(cherry picked from commit 833dd8480adc773e36d388521a14fd8cd11d6a30)
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Merged-In: I8f7984cd491632b3219133044438b82ca4dec80e
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---
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.../server/telecom/PhoneAccountRegistrar.java | 15 +++++++++++++++
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1 file changed, 15 insertions(+)
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diff --git a/src/com/android/server/telecom/PhoneAccountRegistrar.java b/src/com/android/server/telecom/PhoneAccountRegistrar.java
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index 5323a9669..4bcd2e5c3 100644
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--- a/src/com/android/server/telecom/PhoneAccountRegistrar.java
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+++ b/src/com/android/server/telecom/PhoneAccountRegistrar.java
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@@ -48,6 +48,7 @@ import android.telephony.TelephonyManager;
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import android.text.TextUtils;
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import android.util.AtomicFile;
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import android.util.Base64;
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+import android.util.EventLog;
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import android.util.Xml;
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// TODO: Needed for move to system service: import com.android.internal.R;
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@@ -680,6 +681,7 @@ public class PhoneAccountRegistrar {
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PhoneAccount oldAccount = getPhoneAccountUnchecked(account.getAccountHandle());
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if (oldAccount != null) {
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+ enforceSelfManagedAccountUnmodified(account, oldAccount);
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mState.accounts.remove(oldAccount);
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isEnabled = oldAccount.isEnabled();
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Log.i(this, "Modify account: %s", getAccountDiffString(account, oldAccount));
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@@ -738,6 +740,19 @@ public class PhoneAccountRegistrar {
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}
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}
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+ private void enforceSelfManagedAccountUnmodified(PhoneAccount newAccount,
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+ PhoneAccount oldAccount) {
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+ if (oldAccount.hasCapabilities(PhoneAccount.CAPABILITY_SELF_MANAGED) &&
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+ (!newAccount.hasCapabilities(PhoneAccount.CAPABILITY_SELF_MANAGED))) {
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+ EventLog.writeEvent(0x534e4554, "246930197");
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+ Log.w(this, "Self-managed phone account %s replaced by a non self-managed one",
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+ newAccount.getAccountHandle());
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+ throw new IllegalArgumentException("Error, cannot change a self-managed "
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+ + "phone account " + newAccount.getAccountHandle()
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+ + " to other kinds of phone account");
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+ }
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+ }
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+
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/**
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* Un-registers all phone accounts associated with a specified package.
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*
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