CVE-2023-26074 : Exploit Details and Defense Strategies

This CVE-2023-26074 involves an issue discovered in Samsung Mobile Chipset and Baseband Modem Chipset for various Exynos models. The vulnerability stems from a heap-based buffer overflow in the 5G MM message codec due to insufficient parameter validation when decoding operator-defined access category definitions.

Understanding CVE-2023-26074

This section provides an insight into the nature and impact of CVE-2023-26074.

What is CVE-2023-26074?

CVE-2023-26074 is a heap-based buffer overflow vulnerability found in the 5G MM message codec of Samsung Mobile Chipset and Baseband Modem Chipset for specific Exynos models. The flaw arises from inadequate validation of parameters during the decoding of operator-defined access category definitions.

The Impact of CVE-2023-26074

The vulnerability poses a high risk as it could be exploited by malicious actors to execute arbitrary code or disrupt normal system operations, potentially leading to a compromise of confidentiality and integrity. The severity is rated as "HIGH" based on the CVSS v3.1 scoring system.

Technical Details of CVE-2023-26074

This section delves into the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability involves a heap-based buffer overflow in the 5G MM message codec of Samsung's Exynos chipsets, triggered by insufficient validation of parameters during the decoding of operator-defined access category definitions.

Affected Systems and Versions

The following Exynos models are affected: Exynos 850, Exynos 980, Exynos 1080, Exynos 1280, Exynos 2200, Exynos Modem 5123, Exynos Modem 5300, and Exynos Auto T5123.

Exploitation Mechanism

Malicious actors can potentially exploit this vulnerability by crafting specifically designed payloads to trigger the heap-based buffer overflow in the 5G MM message codec, leading to the execution of arbitrary code.

Mitigation and Prevention

This section outlines the steps to mitigate and prevent the exploitation of CVE-2023-26074.

Immediate Steps to Take

Organizations are advised to apply security updates and patches provided by Samsung to remediate the vulnerability.
Implement network security measures to prevent unauthorized access to affected systems.

Long-Term Security Practices

Regularly update firmware and software to ensure the latest security patches are applied.
Conduct security assessments and penetration testing to identify and address potential vulnerabilities proactively.

Patching and Updates

Stay informed about security updates released by Samsung for the affected Exynos chipsets.
Promptly install relevant patches to mitigate the risk of exploitation associated with CVE-2023-26074.