CVE-2023-42655 : What You Need to Know

A detailed overview of CVE-2023-42655 focusing on the vulnerability, impact, technical details, and mitigation steps.

Understanding CVE-2023-42655

In this section, we will explore the nature of CVE-2023-42655 and its implications.

What is CVE-2023-42655?

The CVE-2023-42655 vulnerability is associated with the sim service and involves a potential security gap that allows the writing of permission usage records for an app without proper permission checks. Exploiting this vulnerability could result in a local escalation of privilege, requiring System execution privileges.

The Impact of CVE-2023-42655

The impact of CVE-2023-42655 can be severe, as it enables a malicious actor to gain unauthorized access to sensitive permission usage records, potentially leading to privilege escalation within the system.

Technical Details of CVE-2023-42655

This section delves into the specific technical aspects of CVE-2023-42655.

Vulnerability Description

The vulnerability arises due to a missing permission check in the sim service, which allows an app to write permission usage records unchecked, opening the door for privilege escalation.

Affected Systems and Versions

The vulnerability affects Unisoc's T760, T770, T820, and S8000 products running on Android 11.

Exploitation Mechanism

Exploiting CVE-2023-42655 requires a local attacker to manipulate the permission usage records of an app to escalate their privileges within the system.

Mitigation and Prevention

In this section, we provide guidance on mitigating the risks associated with CVE-2023-42655.

Immediate Steps to Take

Organizations and users should apply security patches and updates provided by Unisoc promptly to address the vulnerability.
Implement strict permission controls and access restrictions within the system to prevent unauthorized privilege escalation.

Long-Term Security Practices

Regularly monitor and audit permission usage records to detect any unauthorized changes.
Conduct security training and awareness programs to educate users on safe app usage practices.

Patching and Updates

Stay informed about security advisories from Unisoc and promptly apply relevant patches and updates to secure the affected systems.