Local privilege escalation via keyguard completion logic
Published Jul 12, 2023 · Updated Jan 6, 2025
Incorrect authorization in Android 11, 12, 12L, and 13 allows local users to access the lock screen during device setup. KeyguardSecurityContainerController.showNextSecurityScreenOrFinish incorrectly required both an absent security method and a disabled lock screen before completing the SIM PIN or PUK path, rather than completing when either condition held. Exploitation requires local access during device setup with a locked SIM; no user interaction or additional execution privileges are required.
Summary
What happened
Incorrect authorization in Android 11, 12, 12L, and 13 allows local users to access the lock screen during device setup. KeyguardSecurityContainerController.showNextSecurityScreenOrFinish incorrectly required both an absent security method and a disabled lock screen before completing the SIM PIN or PUK path, rather than completing when either condition held. Exploitation requires local access during device setup with a locked SIM; no user interaction or additional execution privileges are required.
The record
- CVE
- CVE-2023-21245
- Published
- Jul 12, 2023
- Updated
- Jan 6, 2025
- Vendor
- Product
- Android
- Classifications
- CWE-863, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 12, 2023CVE publishedPublication date reported by the CVE source.
- Jan 6, 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=11
- Affected versionversion=12
- Affected versionversion=12L
- Affected versionversion=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.
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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