CVE-2019-2082

Vulnerability

In libxaac, the AAC decoder library on Android 10, a missing bounds check leads to an out-of-bounds write. This vulnerability affects Android 10 (security patch level 2019-09-01) and is identified by Android ID A-117495103 [1]. The bug is reachable when processing a specially crafted audio file.

Exploitation

An attacker can exploit this by enticing a user to open a malicious audio file (e.g., via a messaging app or web download). No additional execution privileges are needed beyond user interaction. The out-of-bounds write occurs during parsing of the crafted file.

Impact

Successful exploitation could lead to remote code execution in the context of the media server process, potentially allowing the attacker to execute arbitrary code on the device. The impact is high due to the possibility of full compromise.

Mitigation

The issue is fixed in Android 10 as released with the September 2019 security patch level [1]. Users should ensure their devices receive the Android 10 update or later security patches. No workaround is available; updating is the recommended mitigation.