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A privilege escalation vulnerability exists in Android's AccountManagerService, specifically in the checkKeyIntentParceledCorrectly function of AccountManagerService.java. The flaw is caused by a parcel mismatch condition that can allow an attacker to cause arbitrary activities to be launched with system privileges. Successful exploitation does not require user interaction and can be performed without additional execution privileges beyond local code execution in the affected context.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository is a Proof-of-Concept (PoC) exploit for CVE-2023-45777 (and also demonstrates CVE-2023-21098), targeting a vulnerability in Android's AccountManagerService. The exploit leverages a flaw in how Bundles containing Intents are validated and deserialized across process boundaries. By crafting a Bundle that changes its contents after being sent through Binder IPC, the exploit bypasses security checks intended to prevent untrusted Intents from being launched with system privileges. The core exploit logic is implemented in Ambiguator.java, which constructs such ambiguous Bundles. MainActivity.java demonstrates both in-process and cross-process exploitation, including launching a non-exported system activity (PlatLogoActivity) as a privileged action. The exploit is particularly relevant to Samsung devices (using SemImageClipData), but can be tested on AOSP with a provided patch script. The repository includes all necessary Android app files, custom Parcelable classes, and a script to patch AOSP for testing. No network endpoints are involved; the attack vector is local privilege escalation via IPC and Android system services.
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