Local privilege escalation via unchecked buffer write
Published Dec 17, 2021 · Updated Aug 3, 2024
Out-of-bounds write in MediaTek APUSYS on Android 10.0, 11.0, and 12.0 allows local users with System privileges to gain elevated privileges. APUSYS fails to enforce a bounds check before writing to a memory buffer, allowing data to be written beyond the intended boundary. Exploitation requires local System execution privileges, needs no user interaction, and can raise the attacker's privileges.
Summary
What happened
Out-of-bounds write in MediaTek APUSYS on Android 10.0, 11.0, and 12.0 allows local users with System privileges to gain elevated privileges. APUSYS fails to enforce a bounds check before writing to a memory buffer, allowing data to be written beyond the intended boundary. Exploitation requires local System execution privileges, needs no user interaction, and can raise the attacker's privileges.
The record
- CVE
- CVE-2021-0678
- Published
- Dec 17, 2021
- Updated
- Aug 3, 2024
- Vendor
- MediaTek
- Product
- MediaTek APUSYS
- Classifications
- CWE-119, T1404
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Dec 17, 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 10.0, 11.0, 12.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
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.
Weakness, pattern, technique
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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