System-privileged file access via unsanitized intent
Published Jun 11, 2021 · Updated Aug 3, 2024
Improper intent sanitization in SecSettings on Samsung Mobile Devices before SMR MAY-2021 Release 1 allows local users to access system UID data. The app passes an incoming intent back to its caller without sanitizing it, enabling a malicious app to obtain URI permissions for privileged content providers and combine them with an insecure FileProvider shared under UID 1000. Exploitation requires installation and launch of an attacker-controlled app; the resulting system-context access permits arbitrary file reads and writes.
Summary
What happened
Improper intent sanitization in SecSettings on Samsung Mobile Devices before SMR MAY-2021 Release 1 allows local users to access system UID data. The app passes an incoming intent back to its caller without sanitizing it, enabling a malicious app to obtain URI permissions for privileged content providers and combine them with an insecure FileProvider shared under UID 1000. Exploitation requires installation and launch of an attacker-controlled app; the resulting system-context access permits arbitrary file reads and writes.
The record
- CVE
- CVE-2021-25393
- Published
- Jun 11, 2021
- Updated
- Aug 3, 2024
- Vendor
- Samsung Electronics Co., Ltd.
- Product
- Samsung Mobile Devices
- Classifications
- CWE-732, CWE-94, T1404
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 11, 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=Q(10.0) , R(11.0) <SMR MAY-2021 Release 1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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