CVE-2021-39679 : Exploit Details and Defense Strategies
Learn about CVE-2021-39679, an elevation of privilege vulnerability in Android kernel leading to local escalation of privilege without additional execution privileges or user interaction.
This CVE-2021-39679 article provides details about an elevation of privilege vulnerability in the Android kernel due to a use-after-free issue. It elaborates on the impact, technical details, and mitigation steps involved.
Understanding CVE-2021-39679
CVE-2021-39679 is an elevation of privilege vulnerability in the Android kernel that could lead to local escalation of privilege without requiring additional execution privileges or user interaction.
What is CVE-2021-39679?
A use-after-free vulnerability in init of vendor_graphicbuffer_meta.cpp in Android kernel could allow attackers to escalate privileges locally without the need for extra execution privileges or user interaction.
The Impact of CVE-2021-39679
The vulnerability poses a risk of local escalation of privilege.
Technical Details of CVE-2021-39679
This section covers the vulnerability description, affected systems, versions, and the exploitation mechanism.
Vulnerability Description
The issue arises from a use-after-free vulnerability in the init of vendor_graphicbuffer_meta.cpp in the Android kernel. This flaw facilitates local escalation of privilege without requiring extra execution privileges or user interaction.
Affected Systems and Versions
- Affected Product: Android
- Affected Version: Android kernel
Exploitation Mechanism
The vulnerability is exploitable due to a race condition, enabling attackers to trigger the use-after-free issue.
Mitigation and Prevention
This section outlines immediate steps to take, long-term security practices, and the importance of patching and updates.
Immediate Steps to Take
- Implement the patches provided by the vendor promptly.
- Monitor security bulletins and update mechanisms.
Long-Term Security Practices
- Regularly update software and firmware.
- Conduct security audits and assessments periodically.
- Enhance user privilege management.
Patching and Updates
It is crucial to apply security patches and updates regularly to mitigate the risk of exploitation.