Local privilege escalation via unchecked Parcelable types
Published Jul 9, 2024 · Updated Aug 2, 2024
Type confusion in Android Framework 12 through 14 allows local users to launch applications from the background without user interaction. ParcelableListBinder.onTransact deserializes each Binder-supplied Parcelable and places it in a media-session queue without verifying that it is a QueueItem, allowing a crafted object to capture mAllowlistToken. A low-privileged local application can reuse that token to bypass background-start restrictions; the reported consequence is local privilege escalation.
Summary
What happened
Type confusion in Android Framework 12 through 14 allows local users to launch applications from the background without user interaction. ParcelableListBinder.onTransact deserializes each Binder-supplied Parcelable and places it in a media-session queue without verifying that it is a QueueItem, allowing a crafted object to capture mAllowlistToken. A low-privileged local application can reuse that token to bypass background-start restrictions; the reported consequence is local privilege escalation.
The record
- CVE
- CVE-2024-34723
- Published
- Jul 9, 2024
- Updated
- Aug 2, 2024
- Vendor
- Product
- Android
- Classifications
- CWE-783, T1404
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Jul 9, 2024CVE publishedPublication date reported by the CVE source.
- Aug 2, 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?
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- Affected versionversion=12
- Affected versionversion=12L
- Affected versionversion=13
- Affected versionversion=14
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
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Technologies
Your stack
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Your stack
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