CVE-2023-42740 : What You Need to Know

In December 2023, a CVE-2023-42740 vulnerability was identified in Unisoc (Shanghai) Technologies Co., Ltd. products, affecting various models running Android11, Android12, and Android13. This vulnerability could allow an attacker to exploit a missing permission check in telecom services, resulting in local escalation of privilege.

Understanding CVE-2023-42740

This section will delve into the details of CVE-2023-42740, including its description, impact, affected systems, exploitation mechanism, and mitigation methods.

What is CVE-2023-42740?

The CVE-2023-42740 vulnerability allows unauthorized write permission usage records of an app in telecom services because of a missing permission check. Attackers could exploit this flaw to escalate privileges locally without needing additional execution privileges.

The Impact of CVE-2023-42740

The impact of this vulnerability is significant as it could potentially lead to local privilege escalation, allowing attackers to gain unauthorized access and control over affected devices.

Technical Details of CVE-2023-42740

Let's explore the technical aspects of CVE-2023-42740, including its vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from a missing permission check in Unisoc products, enabling attackers to manipulate write permission usage records within telecom services.

Affected Systems and Versions

CVE-2023-42740 affects devices running Unisoc products including SC7731E, SC9832E, SC9863A, T310, T606, T612, T616, T610, T618, T760, T770, T820, and S8000, with software versions Android11, Android12, and Android13.

Exploitation Mechanism

By exploiting the missing permission check in telecom services, threat actors can tamper with app permission usage records, potentially leading to local privilege escalation on vulnerable devices.

Mitigation and Prevention

This section outlines the steps to mitigate and prevent the exploitation of CVE-2023-42740, ensuring the security of affected systems.

Immediate Steps to Take

Users and administrators are advised to apply security patches and updates provided by Unisoc promptly to address the vulnerability and prevent potential exploitation.

Long-Term Security Practices

Implementing secure coding practices, maintaining up-to-date security protocols, and conducting regular security audits can help enhance the overall security posture of affected systems.

Patching and Updates

Regularly check for security advisories and updates from Unisoc to stay informed about patches addressing CVE-2023-42740 and other vulnerabilities.