Local privilege escalation via stale destination pointer
Published Apr 17, 2020 · Updated Aug 4, 2024
Out-of-bounds write in Android 9 and 10 ClearKey DRM allows local users to escalate privileges through crafted encrypted media. The decrypt_1_2 routine leaves destPtr referencing the wrong buffer instead of the destination's raw memory, so decrypted bytes overwrite heap memory outside the intended buffer. Exploitation requires local low-privileged code but no user interaction, and successful memory corruption executes code in a privileged media process.
Summary
What happened
Out-of-bounds write in Android 9 and 10 ClearKey DRM allows local users to escalate privileges through crafted encrypted media. The decrypt_1_2 routine leaves destPtr referencing the wrong buffer instead of the destination's raw memory, so decrypted bytes overwrite heap memory outside the intended buffer. Exploitation requires local low-privileged code but no user interaction, and successful memory corruption executes code in a privileged media process.
The record
- CVE
- CVE-2020-0079
- Published
- Apr 17, 2020
- Updated
- Aug 4, 2024
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-787, T1404
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 17, 2020CVE 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=Android-9 Android-10
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.
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Technologies
Your stack
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Your stack
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