CVE-2023-25087 : Vulnerability Insights and Analysis

This is a detailed overview of CVE-2023-25087, providing information on the vulnerability, impact, technical details, and mitigation strategies.

Understanding CVE-2023-25087

CVE-2023-25087 is a critical vulnerability found in the vtysh_ubus binary of Milesight UR32L v32.3.0.5, leading to multiple buffer overflow vulnerabilities. Exploiting this issue through a specially crafted HTTP request can result in arbitrary code execution.

What is CVE-2023-25087?

The vulnerability stems from the use of an unsafe sprintf pattern in the firewall_handler_set function of the affected binary. Attackers with high privileges can exploit this flaw by sending malicious HTTP requests, potentially causing significant damage to the system.

The Impact of CVE-2023-25087

With a CVSS base score of 7.2, CVE-2023-25087 is categorized as a high severity issue. The confidentiality, integrity, and availability of the affected system are all at risk, emphasizing the importance of prompt remediation.

Technical Details of CVE-2023-25087

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

Vulnerability Description

The vulnerability arises from multiple buffer overflow vulnerabilities in the vtysh_ubus binary of Milesight UR32L v32.3.0.5. The insecure sprintf pattern used in the firewall_handler_set function is the root cause of the issue, allowing attackers to execute arbitrary code via crafted HTTP requests.

Affected Systems and Versions

Milesight UR32L devices running version v32.3.0.5 are impacted by CVE-2023-25087. Users of this specific product version should take immediate action to mitigate the risk posed by this vulnerability.

Exploitation Mechanism

By sending specially crafted HTTP requests to the vulnerable firewall_handler_set function, attackers can exploit the buffer overflow vulnerabilities present in the system. This can lead to unauthorized code execution with potentially devastating consequences.

Mitigation and Prevention

Understanding how to address CVE-2023-25087 is crucial for organizations to secure their systems and prevent potential exploitation. Implementing the following mitigation strategies can help safeguard against this vulnerability.

Immediate Steps to Take

Disable access to vulnerable services or ports.
Apply security patches or updates provided by the vendor to address the vulnerability.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Conduct regular security assessments and vulnerability scans on IT infrastructure.
Establish robust access control policies and user privileges to minimize the risk of exploitation.
Educate and train employees on cybersecurity best practices to enhance overall security posture.

Patching and Updates

Ensure timely installation of security patches and updates released by Milesight for the UR32L device. Regularly check for firmware updates and apply them promptly to mitigate CVE-2023-25087 and other potential vulnerabilities.