The vulnerability is that the Messaging ("com.android.mms") app patched by LG forwards attacker-controlled intents back to the attacker in the exported "com.android.mms.ui.QClipIntentReceiverActivity" activity. The attacker can abuse this functionality by launching this activity and then sending a broadcast with the "com.lge.message.action.QCLIP" action. The attacker can send, e.g., their own data/clipdata and set Intent.FLAG_GRANT_* flags. After the attacker received that intent in the "onActivityResult()" method, they would have access to arbitrary content providers that have the `android:grantUriPermissions="true"` flag set.
CVSS Details
- CVSS 3.1 Base Score: 3.6
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N)
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