CVE-2021-39634 : Exploit Details and Defense Strategies
Learn about CVE-2021-39634, a local privilege escalation vulnerability in the Android kernel that could allow unauthorized access. Find mitigation steps and best security practices.
This CVE-2021-39634 article provides details about a use-after-free vulnerability in the Android kernel that could allow local privilege escalation without additional permissions.
Understanding CVE-2021-39634
CVE-2021-39634 is a vulnerability in the Android kernel that could result in local privilege escalation without the need for user interaction.
What is CVE-2021-39634?
In fs/eventpoll.c, a use-after-free vulnerability exists in the Android kernel, potentially leading to local escalation of privilege without requiring additional execution privileges or user interaction.
The Impact of CVE-2021-39634
The vulnerability could allow an attacker to escalate privileges locally without user interaction, posing a risk of unauthorized access and control over affected systems.
Technical Details of CVE-2021-39634
The following technical aspects are associated with CVE-2021-39634:
Vulnerability Description
- A use-after-free issue in fs/eventpoll.c
Affected Systems and Versions
- Product: Android
- Version: Android kernel
Exploitation Mechanism
- No additional execution privileges needed
Mitigation and Prevention
Steps to address CVE-2021-39634 include:
Immediate Steps to Take
- Apply official patches from the vendor
- Monitor vendor sources for security advisories
Long-Term Security Practices
- Regularly update systems with the latest security patches
- Implement access controls and least privilege principles
Patching and Updates
- Keep the Android kernel updated with the latest security patches