CVE-2021-39623 : Security Advisory and Response
Learn about CVE-2021-39623, an Android vulnerability that can lead to privilege escalation. Find out how to mitigate and prevent this security risk.
This CVE-2021-39623 article provides details about a vulnerability found in Android that could lead to the elevation of privilege without the need for additional execution privileges.
Understanding CVE-2021-39623
This section delves into the specifics of the CVE-2021-39623 vulnerability found in Android.
What is CVE-2021-39623?
In doRead of SimpleDecodingSource.cpp in Android, an out-of-bounds write occurs due to an incorrect bounds check. This vulnerability could result in remote escalation of privilege with no extra execution privileges required. User interaction is not necessary for exploitation.
The Impact of CVE-2021-39623
The exploitation of this vulnerability could lead to an elevation of privilege on the affected Android devices.
Technical Details of CVE-2021-39623
Exploring the technical aspects of CVE-2021-39623.
Vulnerability Description
The issue arises from a potential out-of-bounds write in SimpleDecodingSource.cpp in Android.
Affected Systems and Versions
- Affected Product: Android
- Affected Versions: Android-10, Android-11, Android-12, Android-9
Exploitation Mechanism
The vulnerability allows for remote escalation of privilege without the need for additional execution privileges.
Mitigation and Prevention
Understanding how to mitigate and prevent the CVE-2021-39623 vulnerability.
Immediate Steps to Take
- Apply security patches provided by Android promptly.
- Monitor official Android security bulletins for updates.
Long-Term Security Practices
- Regularly update Android OS and applications to the latest versions.
- Employ secure coding practices to prevent such vulnerabilities.
Patching and Updates
- Ensure timely installation of security patches issued by Android.