Local privilege escalation via duplicate permission declarations
Published Sep 13, 2022 · Updated Jun 5, 2025
Improper input validation in Android Framework 10 through 12L allows local users to gain dangerous permissions during app installation. The package parser keyed permissions by name and accepted duplicate declarations with different protection levels or groups, allowing later security attributes to replace earlier ones. A locally supplied malicious app triggers the flaw during installation or upgrade without user interaction, resulting in privilege escalation on the device.
Summary
What happened
Improper input validation in Android Framework 10 through 12L allows local users to gain dangerous permissions during app installation. The package parser keyed permissions by name and accepted duplicate declarations with different protection levels or groups, allowing later security attributes to replace earlier ones. A locally supplied malicious app triggers the flaw during installation or upgrade without user interaction, resulting in privilege escalation on the device.
The record
- CVE
- CVE-2022-20392
- Published
- Sep 13, 2022
- Updated
- Jun 5, 2025
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-20, T1404
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 13, 2022CVE publishedPublication date reported by the CVE source.
- Jun 5, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=Android-10 Android-11 Android-12 Android-12L
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.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo