CVE-2023-48691 Explained : Impact and Mitigation

Azure RTOS NetX Duo Remote Code Execution Vulnerability

Understanding CVE-2023-48691

Azure RTOS NetX Duo is a TCP/IP network stack designed for real-time and IoT applications. This CVE identifies a remote code execution vulnerability in Azure RTOS NetX Duo that allows an attacker to trigger an out-of-bounds write, potentially leading to code execution.

What is CVE-2023-48691?

The vulnerability in Azure RTOS NetX Duo could be exploited by an attacker to perform a remote code execution by triggering an out-of-bounds write. The affected components in RTOS v6.2.1 and below are related to the IGMP protocol. The issue has been addressed in the NetX Duo release 6.3.0, and users are strongly recommended to upgrade to the fixed version.

The Impact of CVE-2023-48691

With a CVSS Base Score of 8.1, this vulnerability poses a high-risk threat, impacting confidentiality, integrity, and availability of the affected systems. As it allows remote code execution, attackers could exploit this flaw to take control of the system.

Technical Details of CVE-2023-48691

Vulnerability Description

The vulnerability arises due to an out-of-bounds write in Azure RTOS NetX Duo, enabling attackers to execute arbitrary code remotely. The issue affects versions prior to 6.3.0 and specifically targets components associated with the IGMP protocol.

Affected Systems and Versions

Azure RTOS NetX Duo versions below 6.3.0 are susceptible to this remote code execution vulnerability. Users using RTOS v6.2.1 and earlier are at risk and should update to version 6.3.0 or higher to mitigate the issue.

Exploitation Mechanism

By exploiting the out-of-bounds write vulnerability in Azure RTOS NetX Duo, attackers can manipulate memory outside the bounds of an array, which can lead to executing arbitrary code remotely. The issue was discovered, and a fix has been implemented in version 6.3.0.

Mitigation and Prevention

Immediate Steps to Take

To mitigate the CVE-2023-48691 vulnerability, users are strongly advised to upgrade their Azure RTOS NetX Duo to version 6.3.0 or later. Regularly updating the software to the latest patched versions is crucial to prevent exploitation.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security audits, and staying informed about security updates and patches are essential for maintaining system security. Employing network segmentation and access controls can also help prevent unauthorized access.

Patching and Updates

Users should regularly check for updates and patches released by Azure RTOS NetX Duo to address security vulnerabilities. Applying patches in a timely manner can help safeguard systems against potential threats and exploits.