CVE-2021-0517 : Vulnerability Insights and Analysis
Learn about CVE-2021-0517, a critical vulnerability in ConnectivityService.java of Android-11 leading to potential remote information disclosure. Find mitigation steps and long-term security practices.
Android-11 has a vulnerability (CVE-2021-0517) where an incorrect network state determination in ConnectivityService.java could lead to biasing of networking tasks on non-VPN networks. This flaw may result in remote information disclosure without requiring additional execution privileges.
Understanding CVE-2021-0517
This section provides insights into the nature and impact of the CVE-2021-0517 vulnerability.
What is CVE-2021-0517?
The CVE-2021-0517 vulnerability lies in the incorrect network state determination within ConnectivityService.java of Android-11. It may allow biasing of networking tasks towards non-VPN networks, potentially leading to remote information disclosure.
The Impact of CVE-2021-0517
The impact of CVE-2021-0517 is that an attacker could exploit this vulnerability to disclose remote information without needing additional execution privileges. This potential bias towards non-VPN networks poses a risk of sensitive data exposure.
Technical Details of CVE-2021-0517
This section covers the technical aspects of the CVE-2021-0517 vulnerability.
Vulnerability Description
The vulnerability in the updateCapabilities function of ConnectivityService.java allows for incorrect network state determination, potentially biasing networking tasks towards non-VPN networks, leading to remote information disclosure.
Affected Systems and Versions
The affected product is Android with version Android-11.
Exploitation Mechanism
Exploitation of CVE-2021-0517 could occur without user interaction, facilitating a remote information disclosure attack without the need for additional execution privileges.
Mitigation and Prevention
To address the CVE-2021-0517 vulnerability, immediate actions and long-term security practices can help enhance system security.
Immediate Steps to Take
System administrators should apply security patches promptly to mitigate the risk of remote information disclosure through the vulnerability in ConnectivityService.java.
Long-Term Security Practices
Employing network segmentation and monitoring mechanisms can help prevent unauthorized access to sensitive information via potential networking biases in Android-11.
Patching and Updates
Regularly updating the Android operating system and implementing security patches issued by the vendor can help safeguard against potential exploitation of CVE-2021-0517.