System privilege escalation via imgsys use-after-free race
Published Aug 7, 2023 · Updated Nov 7, 2024
Use-after-free in MediaTek imgsys on MT6879, MT6895, MT6983, MT8188, MT8195, MT8395, and MT8781 allows local users to elevate privileges. A race lets imgsys access an object after its memory has been freed; the specific function and shared resource are not publicly identified. Exploitation requires existing System execution privileges but no user interaction, and successful exploitation elevates local privileges.
Summary
What happened
Use-after-free in MediaTek imgsys on MT6879, MT6895, MT6983, MT8188, MT8195, MT8395, and MT8781 allows local users to elevate privileges. A race lets imgsys access an object after its memory has been freed; the specific function and shared resource are not publicly identified. Exploitation requires existing System execution privileges but no user interaction, and successful exploitation elevates local privileges.
The record
- CVE
- CVE-2023-20801
- Published
- Aug 7, 2023
- Updated
- Nov 7, 2024
- Vendor
- MediaTek
- Product
- MT6879
- Classifications
- CWE-362, CWE-416, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Aug 7, 2023CVE publishedPublication date reported by the CVE source.
- Nov 7, 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_12.0_13.0_IOT_v23.0\/Yocto_4.0\/
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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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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