CVE-2018-9559 : Exploit Details and Defense Strategies
Learn about CVE-2018-9559, a vulnerability in Android's cryptfs.cpp file allowing out-of-bounds write, potentially leading to local privilege escalation. Find mitigation steps and affected versions here.
Android Cryptfs.cpp Out-of-Bounds Write Vulnerability
Understanding CVE-2018-9559
What is CVE-2018-9559?
The CVE-2018-9559 vulnerability is found in the function persist_set_key and other functions within the cryptfs.cpp file in Android. It allows for an out-of-bounds write, potentially leading to local privilege escalation without requiring additional execution privileges.
The Impact of CVE-2018-9559
This vulnerability affects various versions of Android, including Android-7.0, Android-7.1.1, Android-7.1.2, Android-8.0, Android-8.1, and Android-9. If exploited, it could enable an attacker to escalate privileges locally.
Technical Details of CVE-2018-9559
Vulnerability Description
The vulnerability arises from uncaught errors in the cryptfs.cpp file, specifically in the persist_set_key function, allowing for an out-of-bounds write.
Affected Systems and Versions
- Product: Android
- Versions: Android-7.0, Android-7.1.1, Android-7.1.2, Android-8.0, Android-8.1, Android-9
Exploitation Mechanism
The vulnerability can be exploited locally without the need for additional execution privileges, potentially leading to privilege escalation.
Mitigation and Prevention
Immediate Steps to Take
- Apply security patches provided by Google for the affected Android versions.
- Monitor official security bulletins for updates and advisories.
Long-Term Security Practices
- Regularly update Android devices to the latest software versions.
- Implement security best practices to mitigate privilege escalation risks.
Patching and Updates
Ensure timely installation of security updates and patches released by Google for Android devices.