Remote privilege escalation via GATT bounds check
Published Mar 16, 2022 · Updated Aug 4, 2024
Out-of-bounds write in Android 12 Bluetooth System allows remote attackers to gain elevated privileges through a GATT notification. The gatt_process_notification function in gatt_cl.cc applies an incorrect bounds check while processing an incoming GATT notification, permitting a write outside the intended buffer. No authentication, existing execution privileges, or user interaction is required; successful exploitation elevates code execution on the device.
Summary
What happened
Out-of-bounds write in Android 12 Bluetooth System allows remote attackers to gain elevated privileges through a GATT notification. The gatt_process_notification function in gatt_cl.cc applies an incorrect bounds check while processing an incoming GATT notification, permitting a write outside the intended buffer. No authentication, existing execution privileges, or user interaction is required; successful exploitation elevates code execution on the device.
The record
- CVE
- CVE-2021-39708
- Published
- Mar 16, 2022
- Updated
- Aug 4, 2024
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-787, T1664
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 16, 2022CVE publishedPublication date reported by the CVE source.
- Aug 4, 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?
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- Affected versionversion=Android-12
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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