CVE-2021-39659 : Exploit Details and Defense Strategies

This CVE entry pertains to a vulnerability in Android versions 10, 11, and 12 that could result in denial of service without requiring user interaction.

Understanding CVE-2021-39659

This section delves into the nature and impact of the vulnerability.

What is CVE-2021-39659?

CVE-2021-39659 involves a flaw in CreateConnectionProcessor.java that could impede access to emergency calling, potentially leading to local denial of service.

The Impact of CVE-2021-39659

The vulnerability poses a risk of denial of service without the need for user interaction, affecting the availability of emergency services.

Technical Details of CVE-2021-39659

Explore the specifics of the vulnerability in this section.

Vulnerability Description

The vulnerability occurs in sortSimPhoneAccountsForEmergency of CreateConnectionProcessor.java, allowing for the obstruction of emergency calling access.

Affected Systems and Versions

Product: Android
Versions Affected: Android-10, Android-11, Android-12

Exploitation Mechanism

The flaw could be exploited to disrupt emergency calling services, causing a denial of service situation.

Mitigation and Prevention

Learn how to address and prevent the CVE-2021-39659 vulnerability.

Immediate Steps to Take

Update affected Android devices to the latest patched versions.
Monitor security bulletins for related updates and advisories.

Long-Term Security Practices

Regularly update and patch software to mitigate potential vulnerabilities.
Implement security best practices to enhance overall device protection.

Patching and Updates

Ensure timely installation of security patches and updates to safeguard against known vulnerabilities.