CVE-2023-21434 : Exploit Details and Defense Strategies

An improper input validation vulnerability in Galaxy Store prior to version 4.5.49.8 has been identified, allowing local attackers to execute JavaScript by launching a web page. This vulnerability was published on February 9, 2023, by Samsung Mobile.

Understanding CVE-2023-21434

This section delves into the details of the CVE-2023-21434 vulnerability, its impact, technical aspects, and mitigation strategies.

What is CVE-2023-21434?

CVE-2023-21434 is an improper input validation vulnerability found in the Galaxy Store application before version 4.5.49.8, developed by Samsung Mobile. This security flaw enables local attackers to execute malicious JavaScript by triggering a specially crafted web page.

The Impact of CVE-2023-21434

The impact of CVE-2023-21434 is considered moderate, with a CVSS base score of 6.2 out of 10. It allows attackers to run arbitrary JavaScript code within the context of the vulnerable application, potentially leading to unauthorized actions, data theft, or further exploitation of the system.

Technical Details of CVE-2023-21434

In this section, we will explore specific technical aspects of the CVE-2023-21434 vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability stems from improper input validation within the Galaxy Store application, which fails to properly sanitize user-supplied data. This oversight enables attackers to inject and execute malicious JavaScript code, posing a significant security risk.

Affected Systems and Versions

The vulnerability affects Galaxy Store versions earlier than 4.5.49.8. Users utilizing versions below this specified release are susceptible to the exploitation of CVE-2023-21434.

Exploitation Mechanism

Local attackers can exploit CVE-2023-21434 by crafting a malicious web page containing JavaScript code and persuading a user to visit the page. Upon opening the page within the vulnerable Galaxy Store application, the malicious script gets executed, potentially leading to unauthorized actions.

Mitigation and Prevention

Protecting systems from CVE-2023-21434 requires immediate steps, long-term security practices, and regular patching and updates to ensure system security.

Immediate Steps to Take

Users are advised to refrain from clicking on suspicious links or visiting untrusted websites that may host malicious content.
Ensure Galaxy Store is updated to the latest version (4.5.49.8 or higher) to mitigate the vulnerability.

Long-Term Security Practices

Implement secure coding practices to prevent improper input validation vulnerabilities in applications.
Regularly educate users on safe browsing habits and recognizing potential security risks.

Patching and Updates

Samsung Mobile has addressed the CVE-2023-21434 vulnerability in Galaxy Store version 4.5.49.8. Users are strongly encouraged to update their applications promptly to safeguard against potential exploitation.