Remote code execution via oversized Bluetooth AVCT command
Published Jun 11, 2021 · Updated Aug 3, 2024
Heap buffer overflow in Android 8.1 through 11 allows remote attackers to execute code through an oversized Bluetooth AVCT command. The avrc_msg_cback function in stack/avrc/avrc_api.cc compares a fixed packet limit with the size of the length field instead of checking p_pkt->len, so it fails to reject an oversized command before later processing writes beyond the heap buffer. The attacker must be within Bluetooth range, but no authentication, user interaction, or additional execution privileges are required.
Summary
What happened
Heap buffer overflow in Android 8.1 through 11 allows remote attackers to execute code through an oversized Bluetooth AVCT command. The avrc_msg_cback function in stack/avrc/avrc_api.cc compares a fixed packet limit with the size of the length field instead of checking p_pkt->len, so it fails to reject an oversized command before later processing writes beyond the heap buffer. The attacker must be within Bluetooth range, but no authentication, user interaction, or additional execution privileges are required.
The record
- CVE
- CVE-2021-0474
- Published
- Jun 11, 2021
- Updated
- Aug 3, 2024
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-787, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 11, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=Android-11 Android-8.1 Android-9 Android-10
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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