CVE-2021-39743 : Security Advisory and Response
Learn about CVE-2021-39743, a privilege escalation vulnerability in Android-12L where a missing permission check can lead to local privilege escalation without additional execution privileges. Find out how to mitigate and prevent this vulnerability.
This article provides details about CVE-2021-39743, a vulnerability found in Android-12L.
Understanding CVE-2021-39743
CVE-2021-39743 is related to a privilege escalation issue in Android-12L.
What is CVE-2021-39743?
In PackageManager for Android-12L, a missing permission check allows updating the last usage time of another package, leading to local privilege escalation without requiring additional execution privileges. No user interaction is necessary for exploitation.
The Impact of CVE-2021-39743
The vulnerability can be exploited to escalate privileges locally without the need for additional execution privileges.
Technical Details of CVE-2021-39743
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
- Type: Elevation of privilege
- Description: Missing permission check in PackageManager allows updating the last usage time of another package.
Affected Systems and Versions
- Affected Product: Android
- Affected Version: Android-12L
Exploitation Mechanism
The vulnerability can be exploited locally without requiring additional execution privileges.
Mitigation and Prevention
Preventative measures and steps to address the CVE-2021-39743 vulnerability.
Immediate Steps to Take
- Apply relevant security patches promptly.
- Monitor for any unusual activities on affected systems.
- Review and restrict permissions as necessary.
Long-Term Security Practices
- Conduct regular security audits and assessments.
- Implement the principle of least privilege.
- Keep systems and software updated to prevent vulnerabilities.
Patching and Updates
- Stay informed about security bulletins and updates from Android.
- Apply patches and updates promptly to secure the system.