CVE-2021-0994 : Exploit Details and Defense Strategies
CVE-2021-0994 poses an information disclosure risk in Android-12 by allowing unauthorized app detection without permissions. Learn about the impact, technical details, and mitigation steps.
A vulnerability has been identified in Android-12 that could allow an attacker to determine whether an app is installed without the necessary permissions, potentially leading to local information disclosure.
Understanding CVE-2021-0994
This CVE involves a missing permission check in requestRouteToHostAddress of ConnectivityService.java, enabling unauthorized app detection without user interaction.
What is CVE-2021-0994?
The vulnerability allows for local information disclosure in Android-12 by determining app presence without query permissions, posing a risk of unauthorized data access.
The Impact of CVE-2021-0994
Exploitation of this vulnerability could result in the disclosure of sensitive information without requiring additional execution privileges, potentially compromising user privacy.
Technical Details of CVE-2021-0994
The following provides more insight into the technical aspects of the CVE:
Vulnerability Description
The vulnerability arises from a missing permission check in ConnectivityService.java, facilitating app detection without necessary privileges.
Affected Systems and Versions
The issue impacts Android-12 systems, specifically exposing devices running this version to the risk of unauthorized app detection.
Exploitation Mechanism
Attackers can exploit this vulnerability to access local information without user consent or advanced execution permissions.
Mitigation and Prevention
Protecting systems from CVE-2021-0994 involves immediate actions and long-term security practices.
Immediate Steps to Take
Users should be cautious when granting app permissions and consider restricting unnecessary access to sensitive data.
Long-Term Security Practices
Implementing least privilege principles, regular security audits, and staying informed about software updates are essential for enhancing overall security.
Patching and Updates
System administrators and users are advised to apply relevant patches and stay updated on security advisories to mitigate the risk posed by CVE-2021-0994.