CVE-2023-21420 : What You Need to Know

This CVE record pertains to a vulnerability identified as CVE-2023-21420, which has been published and assigned by Samsung Mobile. The vulnerability involves the use of Externally-Controlled Format String vulnerabilities in STST TA prior to SMR Jan-2023 Release 1, potentially leading to arbitrary code execution. The CVE was updated on February 9, 2023, with a publication date of the same.

Understanding CVE-2023-21420

This section delves into a deeper understanding of the CVE-2023-21420 vulnerability.

What is CVE-2023-21420?

CVE-2023-21420 involves the exploitation of Externally-Controlled Format String vulnerabilities in STST TA prior to SMR Jan-2023 Release 1, allowing attackers to execute arbitrary code.

The Impact of CVE-2023-21420

The impact of this vulnerability can result in potential arbitrary code execution, posing significant risks to affected Samsung Mobile Devices.

Technical Details of CVE-2023-21420

In this section, we explore the technical aspects of CVE-2023-21420.

Vulnerability Description

The vulnerability arises from the utilization of Externally-Controlled Format String vulnerabilities in STST TA before the SMR Jan-2023 Release 1, enabling the execution of arbitrary code.

Affected Systems and Versions

The vulnerability affects Samsung Mobile Devices running versions Q(10) and R(11) with Teegris, specifically those versions that are less than SMR Jan-2023 Release 1 and have a custom version type.

Exploitation Mechanism

The vulnerability can be exploited locally with a low attack complexity and low privileges required, without the need for user interaction. It possesses a high severity in terms of integrity and availability impacts.

Mitigation and Prevention

This section focuses on steps to mitigate and prevent the exploitation of CVE-2023-21420.

Immediate Steps to Take

Immediately updating affected Samsung Mobile Devices to SMR Jan-2023 Release 1 or a secure version is crucial to mitigate the risk of arbitrary code execution associated with this vulnerability.

Long-Term Security Practices

Implementing robust security practices, such as regular security updates, vulnerability assessments, and secure coding practices, can help prevent similar vulnerabilities in the future.

Patching and Updates

Regularly monitoring security updates and patches released by Samsung Mobile for their products is essential to address vulnerabilities promptly and maintain a secure environment.