CVE-2021-0873 : Security Advisory and Response
Learn about CVE-2021-0873, a vulnerability in the PowerVR kernel driver on Android devices leading to local privilege escalation. Find out how to mitigate the risk.
A vulnerability has been identified in the PowerVR kernel driver that could potentially lead to local escalation of privilege on Android devices. User interaction is not required for exploitation.
Understanding CVE-2021-0873
This section will delve into the details of CVE-2021-0873.
What is CVE-2021-0873?
The CVE-2021-0873 vulnerability exists in PVRSRVBridgeRGXKickRS of the PowerVR kernel driver. It is characterized by a missing size check, which could trigger an integer overflow, consequently enabling out-of-bounds heap access. This flaw may facilitate a local escalation of privilege without the need for additional execution privileges.
The Impact of CVE-2021-0873
The impact of CVE-2021-0873 is the potential for threat actors to exploit the vulnerability for local privilege escalation, thereby compromising the security of Android devices.
Technical Details of CVE-2021-0873
In this section, we will explore the technical aspects of CVE-2021-0873.
Vulnerability Description
The vulnerability arises from a missing size check in the PowerVR kernel driver, allowing an integer overflow and subsequent out-of-bounds heap access, leading to a local escalation of privilege.
Affected Systems and Versions
The affected system is Android, specifically the Android SoC version. Devices running this version are vulnerable to exploitation.
Exploitation Mechanism
Exploiting CVE-2021-0873 does not require user interaction. Threat actors could leverage the integer overflow to gain out-of-bounds heap access, enabling local privilege escalation.
Mitigation and Prevention
In this section, we will discuss mitigation strategies and preventive measures for CVE-2021-0873.
Immediate Steps to Take
Users are advised to apply security patches promptly to address the CVE-2021-0873 vulnerability. Regularly updating the system can mitigate the risk of exploitation.
Long-Term Security Practices
Implementing robust security practices, such as maintaining updated software and security configurations, can enhance the overall security posture of Android devices.
Patching and Updates
Timely installation of security patches released by Google for Android devices is crucial in remedying the CVE-2021-0873 vulnerability.