CVE-2023-21422 : Vulnerability Insights and Analysis

This CVE record relates to an improper authorization vulnerability found in semAddPublicDnsAddr in WifiService prior to the SMR Jan-2023 Release 1 by Samsung Mobile, which allows attackers to set a custom DNS server without permission via binding WifiService.

Understanding CVE-2023-21422

This section will delve into the details of CVE-2023-21422, including what it is, its impact, technical aspects, and mitigation strategies.

What is CVE-2023-21422?

CVE-2023-21422 is an improper authorization vulnerability discovered in semAddPublicDnsAddr in WifiService before the SMR Jan-2023 Release 1 by Samsung Mobile. This vulnerability enables malicious actors to establish a custom DNS server without the required authorization by binding WifiService.

The Impact of CVE-2023-21422

The impact of CVE-2023-21422 includes the ability for attackers to manipulate the DNS settings on affected Samsung Mobile Devices running versions R(11) and S(12) prior to the SMR Jan-2023 Release 1. This unauthorized alteration can lead to potential security breaches and unauthorized network access.

Technical Details of CVE-2023-21422

In this section, a detailed analysis of the vulnerability will be provided, focusing on its description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in semAddPublicDnsAddr in WifiService allows threat actors to configure a custom DNS server without the necessary permissions, thereby compromising the device's network settings and potentially exposing sensitive data.

Affected Systems and Versions

Samsung Mobile Devices running versions R(11) and S(12) are impacted by this vulnerability prior to the SMR Jan-2023 Release 1. Users of these devices should take immediate action to safeguard their devices and data.

Exploitation Mechanism

By exploiting this vulnerability, attackers can exploit the semAddPublicDnsAddr in WifiService to set a custom DNS server without proper authorization, granting them unauthorized control over network configurations.

Mitigation and Prevention

This section outlines the necessary steps to mitigate the risks posed by CVE-2023-21422 and prevent potential exploitation of the vulnerability.

Immediate Steps to Take

Users of affected Samsung Mobile Devices should update to the SMR Jan-2023 Release 1 or later to patch the vulnerability and prevent unauthorized DNS server modifications. Additionally, monitoring network settings for any unauthorized changes is recommended.

Long-Term Security Practices

Practicing good cybersecurity hygiene, such as regularly updating devices, avoiding unsecured networks, and being cautious of suspicious activities, can help mitigate risks associated with similar vulnerabilities in the future.

Patching and Updates

Staying informed about security updates and promptly applying patches released by Samsung Mobile is crucial in maintaining the security of devices and preventing exploitation of known vulnerabilities like CVE-2023-21422.