CVE-2023-21428 : Security Advisory and Response

A vulnerability marked as CVE-2023-21428 has been identified in TelephonyUI prior to SMR Jan-2023 Release 1 on Samsung Mobile Devices. This vulnerability allows attackers to configure Preferred Call due to improper input validation. The patch released for this CVE removes unused code to address the security issue.

Understanding CVE-2023-21428

This section provides an in-depth look at CVE-2023-21428.

What is CVE-2023-21428?

CVE-2023-21428 is an improper input validation vulnerability found in TelephonyUI before SMR Jan-2023 Release 1 on Samsung Mobile Devices. Attackers can exploit this vulnerability to manipulate Preferred Call settings.

The Impact of CVE-2023-21428

The impact of CVE-2023-21428 lies in the potential for attackers to maliciously set Preferred Call configurations, exploiting the improper input validation in TelephonyUI. This could lead to unauthorized changes in device call settings.

Technical Details of CVE-2023-21428

Explore the technical specifics of CVE-2023-21428.

Vulnerability Description

The vulnerability stems from improper input validation in TelephonyUI, creating a loophole that allows unauthorized configuration of Preferred Call by threat actors.

Affected Systems and Versions

Samsung Mobile Devices running versions R(11), S(12), and T(13) are affected by CVE-2023-21428. This vulnerability impacts systems with software versions less than SMR Jan-2023 Release 1.

Exploitation Mechanism

Attackers can exploit the CVE-2023-21428 vulnerability by utilizing the improper input validation in TelephonyUI to configure Preferred Call settings on vulnerable Samsung Mobile Devices.

Mitigation and Prevention

Discover the steps to mitigate and prevent the exploitation of CVE-2023-21428.

Immediate Steps to Take

Users should update their Samsung Mobile Devices to the SMR Jan-2023 Release 1 or later to eliminate the vulnerability. It is crucial to apply security patches promptly to prevent exploitation.

Long-Term Security Practices

Implementing strict input validation measures and regularly updating devices with the latest security patches can enhance long-term security against similar vulnerabilities.

Patching and Updates

Regularly check for security updates released by Samsung Mobile and ensure timely installation of patches to protect devices from known vulnerabilities like CVE-2023-21428.