Local privilege escalation via unlocked play-policy access
Published Jun 21, 2021 · Updated Aug 3, 2024
Use-after-free in Google Cloud Android 8.1, 9, 10, and 11 allows local users to gain additional privileges via a ClearKey DRM race. The queryKeyStatus path reads the shared mPlayPolicy vector while another path can free its state because DrmPlugin.cpp does not lock the vector during iteration. A malicious local application must win the lifetime race; no user interaction is required, and successful exploitation crosses its existing privilege boundary.
Summary
What happened
Use-after-free in Google Cloud Android 8.1, 9, 10, and 11 allows local users to gain additional privileges via a ClearKey DRM race. The queryKeyStatus path reads the shared mPlayPolicy vector while another path can free its state because DrmPlugin.cpp does not lock the vector during iteration. A malicious local application must win the lifetime race; no user interaction is required, and successful exploitation crosses its existing privilege boundary.
The record
- CVE
- CVE-2021-0508
- Published
- Jun 21, 2021
- Updated
- Aug 3, 2024
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-416, CWE-362, T1626
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 21, 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
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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-8.1 Android-9 Android-10 Android-11
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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