Kernel protection bypass via arbitrary zero write
Published Feb 4, 2020 · Updated Aug 5, 2024
An arbitrary memory write in Samsung mobile devices running Android O(8.0) or P(9.0) with Exynos 8895 allows local users to bypass kernel protections. The RKP Samsung Hypervisor EL2 implementation exposes an API that writes a zero 64-bit value to an attacker-chosen memory address, corrupting protected device memory. Triggering the write requires code execution in the EL1 kernel, after which an attacker can circumvent established security controls; no remote-only path is described.
Summary
What happened
An arbitrary memory write in Samsung mobile devices running Android O(8.0) or P(9.0) with Exynos 8895 allows local users to bypass kernel protections. The RKP Samsung Hypervisor EL2 implementation exposes an API that writes a zero 64-bit value to an attacker-chosen memory address, corrupting protected device memory. Triggering the write requires code execution in the EL1 kernel, after which an attacker can circumvent established security controls; no remote-only path is described.
The record
- CVE
- CVE-2019-19273
- Published
- Feb 4, 2020
- Updated
- Aug 5, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-123, CWE-787, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 4, 2020CVE publishedPublication date reported by the CVE source.
- Aug 5, 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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.
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