CVE-2021-1004 : Exploit Details and Defense Strategies
Learn about CVE-2021-1004, a vulnerability in Android-12's WifiServiceImpl.java that allows local privilege escalation without additional permissions. Find mitigation steps and update recommendations.
Android-12 has a vulnerability in getConfiguredNetworks of WifiServiceImpl.java that allows determining installed apps without permission check, leading to local privilege escalation without additional execution privileges.
Understanding CVE-2021-1004
This CVE affects Android-12 and involves an elevation of privilege vulnerability.
What is CVE-2021-1004?
In the getConfiguredNetworks function of WifiServiceImpl.java in Android-12, a missing permission check allows apps to be identified without proper authorization, enabling local privilege escalation without user interaction.
The Impact of CVE-2021-1004
Exploiting this vulnerability can result in a local escalation of privilege, granting unauthorized access to sensitive information without requiring further execution permissions.
Technical Details of CVE-2021-1004
This section provides specific technical details about the vulnerability.
Vulnerability Description
The vulnerability in getConfiguredNetworks of WifiServiceImpl.java enables the identification of installed applications without the necessary permission authorization, potentially leading to local privilege escalation.
Affected Systems and Versions
The issue affects Android-12 systems specifically, where the missing permission verification in WifiServiceImpl.java can be exploited.
Exploitation Mechanism
By leveraging the vulnerability in the getConfiguredNetworks function of WifiServiceImpl.java, threat actors can bypass permission checks to escalate privileges locally.
Mitigation and Prevention
Here are some steps to mitigate and prevent exploitation of CVE-2021-1004.
Immediate Steps to Take
Users should update their Android-12 devices with the latest security patches to address the vulnerability promptly.
Long-Term Security Practices
Implement strict app permission policies and regularly monitor for security updates to prevent unauthorized privilege escalation.
Patching and Updates
Regularly check for security bulletins and updates from Google for Android-12 to stay protected from known vulnerabilities.