CVE-2023-26073 : Security Advisory and Response

This CVE-2023-26073 vulnerability was discovered in Samsung Mobile Chipset and Baseband Modem Chipset for various Exynos models. The issue involves a heap-based buffer overflow in the 5G MM message codec, which results from insufficient parameter validation when decoding the extended emergency number list.

Understanding CVE-2023-26073

This section will delve into the details of the CVE-2023-26073 vulnerability, its impacts, technical aspects, and mitigation strategies.

What is CVE-2023-26073?

The vulnerability lies in the 5G MM message codec of Samsung Mobile and Baseband Modem Chipsets for multiple Exynos models. By exploiting this flaw, threat actors can execute a heap-based buffer overflow due to inadequate validation of parameters during decoding tasks.

The Impact of CVE-2023-26073

The impact of CVE-2023-26073 is rated as high severity, with a base score of 7.6 according to the CVSS v3.1 scoring system. The vulnerability poses a risk of remote code execution and could potentially compromise the confidentiality, integrity, and availability of affected systems.

Technical Details of CVE-2023-26073

In this section, we will explore the technical aspects of the CVE-2023-26073 vulnerability, including its description, affected systems and versions, and exploitation mechanisms.

Vulnerability Description

The vulnerability stems from a heap-based buffer overflow in the 5G MM message codec of Samsung's Exynos chipsets, caused by a lack of proper parameter validation during the decoding process of extended emergency number lists.

Affected Systems and Versions

The impacted systems include Samsung Mobile Chipset and Baseband Modem Chipset for Exynos 850, Exynos 980, Exynos 1080, Exynos 1280, Exynos 2200, Exynos Modem 5123, Exynos Modem 5300, and Exynos Auto T5123.

Exploitation Mechanism

Threat actors can exploit this vulnerability by sending specially crafted data to the targeted device's 5G MM message codec, triggering a heap-based buffer overflow and potentially gaining unauthorized access.

Mitigation and Prevention

This section covers the necessary steps to mitigate and prevent the exploitation of CVE-2023-26073.

Immediate Steps to Take

Apply security updates and patches provided by Samsung to address the vulnerability.
Implement network security measures to prevent unauthorized access to vulnerable systems.
Monitor network traffic for any suspicious activities that might indicate an exploitation attempt.

Long-Term Security Practices

Regularly update firmware and software to ensure all security patches are up to date.
Conduct regular security audits and assessments to identify and remediate potential vulnerabilities.
Educate users and IT staff on best practices for securing devices and networks.

Patching and Updates

Refer to Samsung's official websites for product security updates and follow their recommendations for patching the CVE-2023-26073 vulnerability.