CVE-2021-0971 Explained : Impact and Mitigation

Android's MPEG4Extractor.cpp is prone to an out-of-bounds write vulnerability, potentially leading to remote information disclosure. This CVE affects Android versions 9, 10, 11, and 12.

Understanding CVE-2021-0971

This CVE, assigned the ID CVE-2021-0971, points to an information disclosure weakness within Android's MPEG4Source::read function due to a missing bounds check.

What is CVE-2021-0971?

CVE-2021-0971 highlights a critical security issue in Android's MPEG4Extractor.cpp that could allow remote attackers to obtain sensitive information without requiring additional privileges.

The Impact of CVE-2021-0971

The vulnerability in MPEG4Source::read could result in exposed data through an out-of-bounds write scenario, requiring user interaction for potential exploitation.

Technical Details of CVE-2021-0971

This section dives deeper into the technical aspects of the vulnerability to provide a more comprehensive understanding.

Vulnerability Description

The flaw arises due to a missing bounds check in MPEG4Source::read, allowing unauthorized access to potentially confidential data.

Affected Systems and Versions

Android versions 9, 10, 11, and 12 are impacted by this vulnerability, leaving a wide range of devices susceptible to exploitation.

Exploitation Mechanism

Remote threat actors could trigger an out-of-bounds write through this vulnerability, facilitating the disclosure of sensitive information without the need for elevated permissions.

Mitigation and Prevention

To address CVE-2021-0971, immediate actions and long-term security strategies are essential.

Immediate Steps to Take

Users are advised to apply security patches promptly, maintain system updates, and exercise caution while interacting with untrusted sources.

Long-Term Security Practices

Incorporating robust security practices, such as regular system audits, user awareness training, and secure coding protocols, can fortify defenses against similar vulnerabilities.

Patching and Updates

Staying informed about security bulletins and promptly applying patches released by Android is crucial to mitigate the risks posed by CVE-2021-0971.