CVE-2023-20841 Explained : Impact and Mitigation

This CVE, assigned by MediaTek, involves a vulnerability in imgsys that could potentially lead to a local escalation of privilege. The exploit requires user interaction and could result in an out-of-bounds write, lacking valid range checking. It was published on September 4, 2023.

Understanding CVE-2023-20841

This section delves into the details surrounding CVE-2023-20841, shedding light on its implications and impact.

What is CVE-2023-20841?

CVE-2023-20841 is a vulnerability within imgsys that could allow for a local escalation of privilege. The exploit requires user interaction and may lead to an out-of-bounds write due to a missing valid range checking mechanism.

The Impact of CVE-2023-20841

The impact of this vulnerability is significant, as it could potentially grant unauthorized users elevated privileges within the system, posing a threat to data security and system integrity.

Technical Details of CVE-2023-20841

In this section, we explore the technical aspects of CVE-2023-20841, including its description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in imgsys could result in an out-of-bounds write, as valid range checking is missing. This flaw could be exploited to achieve a local escalation of privilege, requiring system execution privileges.

Affected Systems and Versions

The following MediaTek products are affected: MT2713, MT6895, MT6897, MT6983, MT8188, MT8195, MT8395, and MT8673. The affected versions include Android 11.0, 12.0, Linux 6.1, IOT-v23.0, and Yocto 4.0.

Exploitation Mechanism

To exploit CVE-2023-20841, an attacker would need user interaction to trigger the vulnerability. By exploiting the lack of valid range checking, an out-of-bounds write could occur, potentially leading to a local privilege escalation.

Mitigation and Prevention

This section outlines the steps that can be taken to mitigate the risks associated with CVE-2023-20841 and prevent potential exploits.

Immediate Steps to Take

Users and administrators are advised to apply the provided patch with Patch ID ALPS07326455 to address the vulnerability promptly. Additionally, exercising caution while interacting with untrusted sources can help prevent exploitation.

Long-Term Security Practices

Implementing strong access control measures, regular security audits, and user awareness training can contribute to enhancing overall security posture and mitigating similar vulnerabilities in the future.

Patching and Updates

It is crucial for users to regularly update their systems and software to ensure they are protected against known vulnerabilities. Staying informed about security bulletins and promptly applying patches is essential for maintaining a secure environment.