CVE-2023-20839 : Exploit Details and Defense Strategies

This CVE record was assigned by MediaTek and was published on September 4, 2023. The vulnerability affects multiple MediaTek products and requires user interaction for exploitation.

Understanding CVE-2023-20839

This CVE, identified as CVE-2023-20839, pertains to a vulnerability present in imgsys, which could potentially lead to an out-of-bounds read due to a lack of valid range checking. Exploiting this vulnerability could result in local information disclosure, requiring system execution privileges. The patch ID associated with this issue is ALPS07326455, with Issue ID ALPS07326409.

What is CVE-2023-20839?

CVE-2023-20839 involves an out-of-bounds read vulnerability in imgsys that can be exploited to disclose local information, necessitating system execution privileges.

The Impact of CVE-2023-20839

The impact of CVE-2023-20839 is significant as it enables a potential attacker to access local information through the exploitation of the out-of-bounds read vulnerability with system execution privileges.

Technical Details of CVE-2023-20839

This section delves into the technical aspects of the CVE, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in imgsys leads to an out-of-bounds read due to the absence of valid range checking, facilitating potential information disclosure.

Affected Systems and Versions

The affected systems include MediaTek products such as MT2713, MT6895, MT6897, MT6983, MT8188, MT8195, MT8395, and MT8673. The impacted versions encompass Android 11.0, 12.0, Linux 6.1, IOT-v23.0, and Yocto 4.0.

Exploitation Mechanism

Exploiting this vulnerability requires user interaction and system execution privileges, making it crucial to have proactive mitigation measures in place.

Mitigation and Prevention

In this section, we explore the steps to mitigate and prevent the exploitation of CVE-2023-20839, ensuring a secure system environment.

Immediate Steps to Take

Immediate actions involve applying the provided patch ID, ALPS07326455, to address the vulnerability present in imgsys and prevent local information disclosure.

Long-Term Security Practices

To enhance long-term security, it is advisable to follow robust security practices, including regular vulnerability assessments, secure coding protocols, and user training on identifying and reporting potential security threats.

Patching and Updates

Regularly updating systems and applying patches provided by vendors, such as MediaTek, is essential to ensure that known vulnerabilities are addressed promptly, reducing the risk of exploitation.