CVE-2021-0708 : Security Advisory and Response

In April 2021, a vulnerability was discovered in Android that could potentially allow for local escalation of privilege without requiring any additional execution privileges. This vulnerability, identified as CVE-2021-0708, affects multiple versions of the Android operating system.

Understanding CVE-2021-0708

This section will delve into the details surrounding CVE-2021-0708, including its impact, technical description, affected systems, and mitigation strategies.

What is CVE-2021-0708?

The vulnerability resides in the runDumpHeap function of ActivityManagerShellCommand.java within Android. It involves a scenario where system files may be deleted due to a confused deputy situation, creating an opportunity for a local privilege escalation attack.

The Impact of CVE-2021-0708

CVE-2021-0708 poses a risk of local escalation of privilege on affected Android devices. Successful exploitation of this vulnerability could result in an attacker gaining elevated privileges without the need for user interaction.

Technical Details of CVE-2021-0708

Let's explore the technical aspects of CVE-2021-0708, including a detailed vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in ActivityManagerShellCommand.java can be exploited to delete system files, leading to a local escalation of privilege.

Affected Systems and Versions

Android versions 9, 10, 11, and 8.1 are all impacted by CVE-2021-0708. Users on these versions are at risk of potential privilege escalation attacks.

Exploitation Mechanism

The exploit leverages the runDumpHeap function to delete system files, enabling an attacker to escalate privileges locally without requiring additional execution rights.

Mitigation and Prevention

Discover the essential steps to mitigate the risk posed by CVE-2021-0708, safeguarding Android devices from potential exploitation.

Immediate Steps to Take

For immediate protection, users are advised to apply security patches and updates released by Android to address CVE-2021-0708.

Long-Term Security Practices

Implementing robust security practices such as regular system updates, security best practices, and monitoring for unauthorized changes can enhance long-term defense against privilege escalation vulnerabilities.

Patching and Updates

Regularly check for official security bulletins and patches from Android to ensure that devices are up-to-date with the latest security fixes for CVE-2021-0708.