CVE-2021-0439 : Exploit Details and Defense Strategies
Learn about CVE-2021-0439, a vulnerability in Android-11 allowing out-of-bounds write operations leading to local privilege escalation. Find out how to mitigate this security risk.
A vulnerability has been identified in Android-11 that could allow an attacker to perform an out-of-bounds write operation in com_android_server_power_PowerManagerService.cpp, leading to local privilege escalation without requiring additional execution privileges. This CVE poses a risk of elevation of privilege without the need for user interaction.
Understanding CVE-2021-0439
This section delves into the details of CVE-2021-0439, shedding light on its impact and technical aspects.
What is CVE-2021-0439?
The vulnerability lies in the setPowerModeWithHandle function of com_android_server_power_PowerManagerService.cpp, potentially allowing unauthorized access and escalation of user privileges.
The Impact of CVE-2021-0439
CVE-2021-0439 could be exploited to achieve local escalation of privilege, enhancing the attacker's control over the compromised system.
Technical Details of CVE-2021-0439
Explore the technical specifics of CVE-2021-0439 below.
Vulnerability Description
The flaw arises from a missing bounds check in setPowerModeWithHandle, enabling an out-of-bounds write that can be leveraged for privilege escalation.
Affected Systems and Versions
The vulnerability affects devices running Android-11, making them susceptible to the privilege escalation issue.
Exploitation Mechanism
Attackers could exploit this vulnerability to gain unauthorized access and escalate their privileges on the target device.
Mitigation and Prevention
Discover the recommended steps to mitigate the risks associated with CVE-2021-0439.
Immediate Steps to Take
Users are advised to apply security patches and updates promptly to address the vulnerability and prevent potential exploitation.
Long-Term Security Practices
Implementing strong access controls, regular security audits, and following best practices can help bolster the overall security posture.
Patching and Updates
Regularly monitoring for security advisories and promptly applying patches provided by the vendor is crucial to mitigate the impact of such vulnerabilities.