CVE-2021-0923 : Security Advisory and Response

Android-12 is affected by CVE-2021-0923, which allows attackers to gain internal permissions through a missing permission check in createOrUpdate of Permission.java. This could result in local privilege escalation without requiring additional execution privileges or user interaction.

Understanding CVE-2021-0923

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-0923.

What is CVE-2021-0923?

CVE-2021-0923 is classified as an elevation of privilege vulnerability in Android-12, enabling unauthorized users to escalate their privileges locally.

The Impact of CVE-2021-0923

The vulnerability in Permission.java could potentially allow threat actors to achieve local privilege escalation without the need for user interaction, posing a significant security risk to affected systems.

Technical Details of CVE-2021-0923

Understanding the vulnerability, affected systems, and exploitation methods is crucial for developing effective mitigation measures.

Vulnerability Description

The issue lies in createOrUpdate of Permission.java, where the absence of a permission check enables attackers to exploit internal permissions, leading to unauthorized privilege escalation.

Affected Systems and Versions

Android-12 is confirmed to be impacted by CVE-2021-0923, making devices running this version susceptible to the privilege escalation vulnerability.

Exploitation Mechanism

Attackers can leverage the missing permission check in Permission.java to gain internal permissions and elevate their privileges locally on Android-12 devices.

Mitigation and Prevention

Implementing immediate steps and adopting long-term security practices is essential to safeguard systems from CVE-2021-0923.

Immediate Steps to Take

It is recommended to apply security patches promptly, monitor for suspicious activities, and restrict unnecessary permissions to mitigate the risk of exploitation.

Long-Term Security Practices

Regular security updates, security awareness training, and enforcing the principle of least privilege help enhance the overall security posture against privilege escalation vulnerabilities.

Patching and Updates

Stay informed about security bulletins and update releases from official sources to apply patches as soon as they are available, reducing the likelihood of successful exploits.