Local privilege escalation via unchecked OPTEE write
Published Aug 7, 2023 · Updated Oct 15, 2024
Out-of-bounds write in OPTEE on five MediaTek chipsets with Android 11.0 allows local users to escalate privileges. A missing bounds check permits an out-of-range memory write, but MediaTek has not disclosed the affected function, buffer, or input path. Exploitation requires existing System execution privileges and no user interaction; the resulting memory corruption enables local privilege escalation.
Summary
What happened
Out-of-bounds write in OPTEE on five MediaTek chipsets with Android 11.0 allows local users to escalate privileges. A missing bounds check permits an out-of-range memory write, but MediaTek has not disclosed the affected function, buffer, or input path. Exploitation requires existing System execution privileges and no user interaction; the resulting memory corruption enables local privilege escalation.
The record
- CVE
- CVE-2023-20808
- Published
- Aug 7, 2023
- Updated
- Oct 15, 2024
- Vendor
- MediaTek
- Product
- MT9022
- Classifications
- CWE-787, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Aug 7, 2023CVE publishedPublication date reported by the CVE source.
- Oct 15, 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 11.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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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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