Local information disclosure via unterminated Parcel strings
Published Mar 10, 2021 · Updated Aug 3, 2024
Out-of-bounds read in Google Cloud Android 8.1 through 11 allows local users to disclose process memory through a malformed Parcel string. android_os_Parcel_readString8 passes an unvalidated string buffer to JNI NewStringUTF, while Parcel readString*Inplace trusts its declared length without ensuring a terminating null byte. A low-privileged local application can trigger the read without user interaction; the documented consequence is memory disclosure, not modification or service interruption.
Summary
What happened
Out-of-bounds read in Google Cloud Android 8.1 through 11 allows local users to disclose process memory through a malformed Parcel string. android_os_Parcel_readString8 passes an unvalidated string buffer to JNI NewStringUTF, while Parcel readString*Inplace trusts its declared length without ensuring a terminating null byte. A low-privileged local application can trigger the read without user interaction; the documented consequence is memory disclosure, not modification or service interruption.
The record
- CVE
- CVE-2021-0394
- Published
- Mar 10, 2021
- Updated
- Aug 3, 2024
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-125, T1005
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Mar 10, 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=Android-11 Android-8.1 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.
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