Root privilege escalation via AOD driver integer overflow
Published Aug 3, 2021 · Updated Aug 3, 2024
Out-of-bounds write in Huawei HarmonyOS 2.0 allows local users to gain root privileges through the Always On Display driver. An integer overflow in the AOD driver permits a write beyond the intended memory bounds, but Huawei has not disclosed the affected routine or input. A low-privileged local context is required, and successful exploitation grants root-level control of the device.
Summary
What happened
Out-of-bounds write in Huawei HarmonyOS 2.0 allows local users to gain root privileges through the Always On Display driver. An integer overflow in the AOD driver permits a write beyond the intended memory bounds, but Huawei has not disclosed the affected routine or input. A low-privileged local context is required, and successful exploitation grants root-level control of the device.
The record
- CVE
- CVE-2021-22423
- Published
- Aug 3, 2021
- Updated
- Aug 3, 2024
- Vendor
- Huawei Technologies Co., Ltd.
- Product
- HarmonyOS
- Classifications
- CWE-787, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 3, 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
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=2.0
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.
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