CVE-2021-0390 : What You Need to Know
Android users should be aware of CVE-2021-0390, a vulnerability in WifiNetworkSuggestionsManager.java allowing privilege escalation. Learn about the impact and steps for mitigation.
Android devices are affected by CVE-2021-0390, a vulnerability in the WifiNetworkSuggestionsManager.java file that could allow a local user to escalate privileges without requiring additional execution privileges or user interaction.
Understanding CVE-2021-0390
This vulnerability poses a risk of elevation of privilege on Android devices running specific versions.
What is CVE-2021-0390?
The vulnerability in WifiNetworkSuggestionsManager.java allows unauthorized modification of suggested networks, enabling a background user to escalate privileges locally on the same device.
The Impact of CVE-2021-0390
An attacker could exploit this flaw to elevate privileges without any user interaction, potentially leading to unauthorized access to sensitive data or system control.
Technical Details of CVE-2021-0390
This section outlines the specific technical details related to the vulnerability.
Vulnerability Description
The issue stems from a missing permission check in various methods within WifiNetworkSuggestionsManager.java, enabling a local user to modify suggested networks.
Affected Systems and Versions
Android versions affected include Android-11, Android-8.1, Android-9, and Android-10.
Exploitation Mechanism
The vulnerability allows a background user on the same device to gain escalated privileges without the need for additional execution permissions or user interaction.
Mitigation and Prevention
To secure devices against CVE-2021-0390 and similar vulnerabilities, follow the mitigation steps below.
Immediate Steps to Take
Implement security updates provided by the device manufacturer or Android, and avoid connecting to untrusted networks to reduce the risk of exploitation.
Long-Term Security Practices
Regularly update your device's operating system and applications to patch known vulnerabilities and follow best security practices to protect against potential threats.
Patching and Updates
Stay informed about security bulletins and updates released by Android to address CVE-2021-0390 and ensure timely installation of patches to maintain device security.