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CVE-2021-0641 Explained : Impact and Mitigation

Learn about CVE-2021-0641 affecting Android versions 8.1 to 11. Discover the impact, technical details, and mitigation steps for this information disclosure vulnerability.

Android versions 8.1 to 11 are affected by a vulnerability in SubscriptionController.java, potentially leading to information disclosure. No user interaction is required for exploitation.

Understanding CVE-2021-0641

This CVE highlights a flaw in the getAvailableSubscriptionInfoList function of SubscriptionController.java that could allow disclosure of unique identifiers without the necessary permission check.

What is CVE-2021-0641?

The CVE-2021-0641 vulnerability in Android exposes unique identifiers due to a missing permission check, leading to local information disclosure.

The Impact of CVE-2021-0641

Attackers can exploit this vulnerability to obtain sensitive information without requiring additional execution privileges, posing a risk of local information exposure.

Technical Details of CVE-2021-0641

The vulnerability arises in the getAvailableSubscriptionInfoList function of SubscriptionController.java, affecting Android versions 8.1 through 11.

Vulnerability Description

The issue originates from a missing permission check, potentially allowing unauthorized access to unique identifiers and leading to local information disclosure.

Affected Systems and Versions

Android versions 8.1 through 11 are impacted by this vulnerability, exposing them to the risk of information disclosure.

Exploitation Mechanism

Exploiting this vulnerability does not require user interaction, making it easier for threat actors to access sensitive data without additional privileges.

Mitigation and Prevention

To address CVE-2021-0641, immediate mitigation steps should be taken to reduce the risk of information exposure and enhance long-term security practices.

Immediate Steps to Take

Organizations and users should apply security patches, restrict access to sensitive data, and monitor for any unauthorized access attempts.

Long-Term Security Practices

Implementing security best practices, such as regular security audits, access controls, and user permissions, can help prevent similar vulnerabilities in the future.

Patching and Updates

Regularly update Android devices to the latest software versions and apply security patches provided by Google to ensure protection against known vulnerabilities.

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