CVE-2020-0485 : What You Need to Know
Learn about CVE-2020-0485, a vulnerability in Android-11's UsbBackend.java code allowing unauthorized access to tethering, leading to local privilege escalation. Read for mitigation steps.
Android device users need to be aware of a potential vulnerability in the UsbBackend.java code, allowing unauthorized access to tethering, leading to local privilege escalation without requiring additional execution privileges.
Understanding CVE-2020-0485
This vulnerability, identified as CVE-2020-0485, poses a risk of elevation of privilege on Android devices running version 11.
What is CVE-2020-0485?
CVE-2020-0485 is a security flaw in Android's UsbBackend.java that could be exploited to access tethering from a guest account, potentially enabling local escalation of privileges.
The Impact of CVE-2020-0485
The vulnerability could allow an attacker to gain unauthorized access to tethering capabilities from a guest account, leading to potential local privilege escalation without the need for additional execution privileges.
Technical Details of CVE-2020-0485
Android version 11 is affected by this vulnerability in the UsbBackend.java code.
Vulnerability Description
The flaw lies in the areFunctionsSupported function of UsbBackend.java, where a missing permission check enables access to tethering from a guest account.
Affected Systems and Versions
- Product: Android
- Version: Android-11
Exploitation Mechanism
The vulnerability allows an attacker to access tethering from a guest account without proper permission checks, potentially leading to local privilege escalation.
Mitigation and Prevention
It is crucial for Android users to take immediate actions to mitigate the risks posed by CVE-2020-0485.
Immediate Steps to Take
- Regularly update the Android system to the latest version to patch known security vulnerabilities.
- Implement strict permission controls to limit access to sensitive device functions.
Long-Term Security Practices
- Stay informed about security bulletins and updates from Android to address known vulnerabilities promptly.
- Avoid connecting to unsecured networks and be cautious when granting app permissions.
Patching and Updates
Ensure that the Android device is updated with the latest security patches and fixes to protect against potential exploits of CVE-2020-0485.