CVE-2022-20483 in Android
Summary
by MITRE • 12/13/2022
In several functions that parse avrc response in avrc_pars_ct.cc and related files, there are possible out of bounds reads due to integer overflows. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-12 Android-12L Android-13Android ID: A-242459126
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Analysis
by VulDB Data Team • 04/16/2026
This vulnerability exists within the android bluetooth avrcp (Audio Video Remote Control Profile) implementation where multiple functions in avrc_pars_ct.cc and related files fail to properly validate input data lengths before processing. The flaw manifests as integer overflow conditions that can cause out of bounds memory reads when parsing avrcp responses. These functions handle incoming bluetooth commands from remote devices and do not adequately check the size of incoming data structures before attempting to read from memory locations that may extend beyond allocated buffers.
The technical implementation issues stem from improper handling of length fields within avrcp protocol messages where integer overflows occur during arithmetic operations that determine buffer boundaries. When a remote bluetooth device sends malformed avrcp responses with crafted length values, the parsing functions can overflow their internal counters and subsequently read memory locations that were never intended to be accessed. This vulnerability specifically affects the audio video remote control profile implementation which is used for controlling media playback on android devices through bluetooth connections.
The operational impact of this vulnerability is significant as it enables remote information disclosure without requiring any special privileges or user interaction. An attacker positioned within bluetooth range of an affected android device can craft malicious avrcp responses that trigger the integer overflow conditions, potentially exposing sensitive memory contents including kernel memory, application data, or other system information. The vulnerability affects all major android versions from android 10 through android 13, indicating it is a long-standing issue within the bluetooth stack implementation. This allows attackers to potentially extract confidential information from memory locations that should remain protected, potentially including cryptographic keys, user data, or system configuration details.
The vulnerability maps to CWE-129 and CWE-191 within the CWE database, representing issues related to insufficient input validation and integer overflow conditions respectively. From an ATT&CK perspective, this represents a remote information disclosure technique that could be leveraged in the collection phase of an attack, potentially providing adversaries with additional system information to aid in further exploitation. The lack of user interaction requirement makes this particularly concerning as it can be exploited passively without any user involvement, and the remote nature allows for exploitation from any location within bluetooth range. Mitigation strategies include applying the latest android security patches, implementing bluetooth device access controls, and monitoring for unusual bluetooth activity patterns that might indicate exploitation attempts.