CVE-2021-39773 : Security Advisory and Response
Discover details about CVE-2021-39773, an information disclosure vulnerability impacting Android-12L in VpnManagerService. Learn about the impact, affected systems, exploitation, and mitigation steps.
This CVE-2021-39773 article provides insights into an information disclosure vulnerability affecting Android-12L in the VpnManagerService.
Understanding CVE-2021-39773
This section aims to clarify the nature and impact of the vulnerability.
What is CVE-2021-39773?
CVE-2021-39773 specifically involves the disclosure of installed VPN packages in VpnManagerService, posing a risk of local information exposure without requiring additional execution privileges or user interaction.
The Impact of CVE-2021-39773
The vulnerability could result in local information disclosure, presenting potential privacy risks to affected Android-12L users.
Technical Details of CVE-2021-39773
Explore the technical aspects of the CVE-2021-39773 vulnerability.
Vulnerability Description
The issue stems from a side-channel information disclosure within VpnManagerService, allowing unauthorized access to installed VPN packages.
Affected Systems and Versions
- Product: Android
- Versions Affected: Android-12L
Exploitation Mechanism
The vulnerability can be exploited to disclose installed VPN packages without the need for user interaction or elevated privileges.
Mitigation and Prevention
Discover the steps to mitigate and prevent the exploitation of CVE-2021-39773.
Immediate Steps to Take
- Update affected Android devices to the latest security patches.
- Monitor for any unusual VPN-related activities.
Long-Term Security Practices
- Implement network-level security measures to detect information disclosure attempts.
- Regularly review and update VPN configurations and permissions.
Patching and Updates
Ensure timely installation of security updates provided by Android to address the vulnerability.