Pointer disclosure via restore error logging
Published Jan 7, 2022 · Updated Aug 4, 2024
Information disclosure in Huawei HarmonyOS and EMUI allows local users to obtain trusted-application addresses through error logs. The restore function passes three pointer values to SLog when its parameter validation enters the null-error path. Reaching the trusted application requires an approved client; the demonstrated path used a patched kernel driver and root access, and the disclosed addresses enable later control-flow attacks.
Summary
What happened
Information disclosure in Huawei HarmonyOS and EMUI allows local users to obtain trusted-application addresses through error logs. The restore function passes three pointer values to SLog when its parameter validation enters the null-error path. Reaching the trusted application requires an approved client; the demonstrated path used a patched kernel driver and root access, and the disclosed addresses enable later control-flow attacks.
The record
- CVE
- CVE-2021-40014
- Published
- Jan 7, 2022
- Updated
- Aug 4, 2024
- Vendor
- Huawei Technologies Co., Ltd.
- Product
- HarmonyOS
- Classifications
- CWE-787
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Jan 7, 2022CVE publishedPublication date reported by the CVE source.
- Aug 4, 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=2.0.0
- Affected versionversion=2.0.1
- Affected versionversion=3.0.0
- Affected versionversion=3.1.0
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.
Weakness, pattern, technique
Public exploit references
- TEE_SERVICE_VOICE_REC proof-of-concept demonstrationproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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