CVE-2023-33904 : Exploit Details and Defense Strategies

A detailed overview of the CVE-2023-33904 vulnerability affecting Unisoc devices.

Understanding CVE-2023-20657

This section will cover what CVE-2023-33904 is, its impact, technical details, and mitigation strategies.

What is CVE-2023-20657?

The CVE-2023-33904 vulnerability is found in the hci_server of Unisoc devices, specifically SC9863A, SC9832E, SC7731E, T610, T310, T606, T760, T618, T612, T616, T770, T820, and S8000, running Android 10, 11, or 12. It allows for a potential out-of-bounds read due to a lack of proper bounds checking. Exploiting this flaw could result in local denial of service, requiring system execution privileges.

The Impact of CVE-2023-20657

The vulnerability poses a significant risk of local denial of service attacks on affected Unisoc devices. Attackers with system execution privileges can potentially exploit this weakness to cause disruption and service unavailability.

Technical Details of CVE-2023-20657

This section will delve into the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from a missing bounds check in the hci_server of Unisoc devices, allowing for an out-of-bounds read operation. This flaw requires immediate attention to prevent potential exploitation.

Affected Systems and Versions

Unisoc devices, including SC9863A, SC9832E, SC7731E, T610, T310, T606, T760, T618, T612, T616, T770, T820, and S8000 running Android 10, 11, or 12, are impacted by this vulnerability.

Exploitation Mechanism

To exploit CVE-2023-33904, attackers would need local access to the affected device and system execution privileges. By leveraging the out-of-bounds read issue in hci_server, they can carry out denial of service attacks.

Mitigation and Prevention

This section will outline the immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Users of Unisoc devices should apply security updates provided by the manufacturer promptly. Additionally, implementing proper access controls and monitoring for unusual system behavior is recommended.

Long-Term Security Practices

Maintaining up-to-date software, regular security audits, and user awareness training are essential for robust long-term security practices.

Patching and Updates

Unisoc has released patches to address the CVE-2023-33904 vulnerability. Users are advised to download and install these updates to secure their devices and prevent potential exploitation.