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CVE-2023-21365 : What You Need to Know

Learn about CVE-2023-21365, a critical vulnerability in Google's Android Contacts feature leading to a local denial of service in the Phone app. Find out the impact, technical details, and mitigation strategies.

This article provides a detailed overview of CVE-2023-21365, focusing on its impact, technical details, and mitigation strategies.

Understanding CVE-2023-21365

CVE-2023-21365 is a vulnerability identified in the Contacts feature of Google's Android operating system. This vulnerability could potentially result in a crash loop in the Contacts application due to resource exhaustion, leading to a local denial of service in the Phone app. It is crucial to understand the implications of this vulnerability to take appropriate actions.

What is CVE-2023-21365?

The vulnerability in Contacts could trigger a crash loop, causing resource depletion and ultimately resulting in a denial of service condition in the Phone app. The exploit requires user execution privileges but does not necessitate user interaction, making it a critical security concern for Android users.

The Impact of CVE-2023-21365

The impact of CVE-2023-21365 is significant as it can lead to a local denial of service attack, disrupting the normal functioning of the Phone app. This vulnerability could potentially be exploited by malicious actors to cause interruptions in device usability and overall user experience.

Technical Details of CVE-2023-21365

Understanding the technical aspects of CVE-2023-21365 is essential for implementing effective mitigation strategies and securing affected systems.

Vulnerability Description

The vulnerability in Contacts results in a crash loop due to resource exhaustion, which can be exploited to perform a local denial of service attack in the Phone app. This poses a threat to the stability and performance of Android devices running version 14 of the operating system.

Affected Systems and Versions

Google's Android version 14 is confirmed to be affected by CVE-2023-21365. Users utilizing this specific version are at risk of experiencing the denial of service issue in the Phone app due to the vulnerability present in the Contacts feature.

Exploitation Mechanism

The exploit of CVE-2023-21365 necessitates user execution privileges, making it crucial for threat actors to have access to user-level permissions on the affected device. By triggering a crash loop in Contacts, attackers can induce a denial of service condition in the Phone app without requiring user interaction.

Mitigation and Prevention

To safeguard systems against CVE-2023-21365 and mitigate the risks associated with this vulnerability, it is imperative to follow proper mitigation and prevention measures.

Immediate Steps to Take

Users and administrators should be vigilant and apply immediate security measures to address CVE-2023-21365. Monitoring for any unusual behavior in the Contacts or Phone app and promptly installing security updates from Google is essential to prevent exploitation of this vulnerability.

Long-Term Security Practices

In the long term, practicing good security hygiene such as regularly updating the Android operating system, maintaining strong user authentication protocols, and employing secure coding practices can help prevent similar vulnerabilities from being exploited in the future.

Patching and Updates

Google has released security updates to address CVE-2023-21365. Users using Android version 14 should ensure they install the latest patches provided by Google to mitigate the risk of a denial of service attack through the Contacts vulnerability. Regularly updating the software is crucial for enhancing the security posture of Android devices and protecting against potential threats.

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