CVE-2023-25096 Explained : Impact and Mitigation

This CVE-2023-25096 was published on July 6, 2023, and affects the Milesight UR32L v32.3.0.5 device. The vulnerability is related to multiple buffer overflow issues in the vtysh_ubus binary, which can be exploited through a specially crafted HTTP request to achieve arbitrary code execution.

Understanding CVE-2023-25096

This section will delve into the details of the CVE-2023-25096 vulnerability, its impact, technical description, affected systems, exploitation mechanism, and mitigation strategies.

What is CVE-2023-25096?

CVE-2023-25096 is a vulnerability found in the Milesight UR32L v32.3.0.5 device, specifically in the vtysh_ubus binary. The vulnerability arises from the utilization of an unsafe sprintf pattern, enabling attackers to execute arbitrary code by sending crafted HTTP requests.

The Impact of CVE-2023-25096

The impact of CVE-2023-25096 is rated as high severity with a CVSS base score of 7.2. This vulnerability allows an attacker with high privileges to trigger buffer overflow vulnerabilities and potentially execute arbitrary code, compromising the confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2023-25096

Here, we will explore the technical aspects of CVE-2023-25096, including vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in CVE-2023-25096 stems from multiple buffer overflow issues in the set_qos function of the Milesight UR32L v32.3.0.5 device, specifically related to the rule_name variable and its formatting vulnerabilities.

Affected Systems and Versions

The affected system in this CVE is the Milesight UR32L running version v32.3.0.5.

Exploitation Mechanism

Attackers can exploit CVE-2023-25096 by sending specially crafted HTTP requests to the affected device, triggering the buffer overflow vulnerabilities in the vtysh_ubus binary and potentially executing arbitrary code.

Mitigation and Prevention

In this section, we will discuss the steps that can be taken to mitigate the risks associated with CVE-2023-25096.

Immediate Steps to Take

Immediate actions should include applying security patches released by Milesight to address the buffer overflow vulnerabilities in the vtysh_ubus binary. Restricting network access to the affected device can also help mitigate the risk of exploitation.

Long-Term Security Practices

Implementing secure coding practices, regular security assessments, and monitoring for any anomalous network traffic can enhance the long-term security posture of the system to prevent similar vulnerabilities in the future.

Patching and Updates

Regularly checking for security updates and patches from the vendor, in this case, Milesight, is crucial to ensuring that known vulnerabilities, such as CVE-2023-25096, are promptly addressed to secure the device and prevent potential exploitation.