CVE-2021-0926 Explained : Impact and Mitigation
Learn about CVE-2021-0926, an elevation of privilege vulnerability in Android versions 9, 10, 11, and 12. Understand the impact, technical details, and mitigation steps.
An elevation of privilege vulnerability, CVE-2021-0926, impacting Android versions 10, 11, 12, and 9 allows an attacker to add a contact without the user's consent, potentially leading to local escalation of privilege without further execution privileges.
Understanding CVE-2021-0926
This vulnerability affects Android devices running versions 9, 10, 11, and 12. It stems from a missing permission check in the onCreate function of NfcImportVCardActivity.java.
What is CVE-2021-0926?
An elevation of privilege vulnerability in Android versions 9, 10, 11, and 12 enables attackers to add a contact without user consent, leading to potential local escalation of privileges.
The Impact of CVE-2021-0926
The vulnerability could be exploited without the user's interaction, allowing malicious actors to escalate privileges locally on the affected Android devices.
Technical Details of CVE-2021-0926
This section provides detailed technical information on the vulnerability.
Vulnerability Description
The issue exists in the onCreate function of NfcImportVCardActivity.java, where the lack of a permission check enables unauthorized addition of contacts.
Affected Systems and Versions
Android versions 9, 10, 11, and 12 are affected by this elevation of privilege vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability to add a contact without user consent, potentially leading to local privilege escalation on vulnerable Android devices.
Mitigation and Prevention
Protecting your system from CVE-2021-0926 requires immediate action and long-term security practices.
Immediate Steps to Take
Users are advised to apply security updates promptly and exercise caution while interacting with untrusted apps and content.
Long-Term Security Practices
Regularly update your Android device with the latest security patches and avoid granting unnecessary permissions to apps.
Patching and Updates
Ensure your Android device is updated with the latest security patches provided by the manufacturer to mitigate the risk associated with CVE-2021-0926.