Local information disclosure via misaligned sensor string
Published May 15, 2023 · Updated Jan 31, 2025
Out-of-bounds read in Android 11, 12, 12L, and 13 allows local users to disclose process memory through malformed sensor metadata. Sensor.cpp's unflattenString8 validates the declared string length but formerly advanced by its larger four-byte-aligned length without first verifying that the padding remained in the buffer. Exploitation requires local access but no user interaction or additional execution privileges, and its bounded consequence is disclosure of memory visible to the affected process.
Summary
What happened
Out-of-bounds read in Android 11, 12, 12L, and 13 allows local users to disclose process memory through malformed sensor metadata. Sensor.cpp's unflattenString8 validates the declared string length but formerly advanced by its larger four-byte-aligned length without first verifying that the padding remained in the buffer. Exploitation requires local access but no user interaction or additional execution privileges, and its bounded consequence is disclosure of memory visible to the affected process.
The record
- CVE
- CVE-2023-21118
- Published
- May 15, 2023
- Updated
- Jan 31, 2025
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-125, T1005
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- May 15, 2023CVE publishedPublication date reported by the CVE source.
- Jan 31, 2025Record 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-12 Android-12L Android-13
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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