CVE-2023-25088 : Security Advisory and Response

This CVE-2023-25088 article provides insights into a critical vulnerability affecting Milesight UR32L v32.3.0.5. The vulnerability stems from multiple buffer overflow issues in the vtysh_ubus binary, leading to potential arbitrary code execution by malicious actors with high privileges.

Understanding CVE-2023-25088

CVE-2023-25088 is a high-severity vulnerability that impacts the security of the Milesight UR32L v32.3.0.5, allowing attackers to exploit buffer overflow vulnerabilities in the vtysh_ubus binary through specially crafted HTTP requests, ultimately enabling them to execute arbitrary code.

What is CVE-2023-25088?

The vulnerability in question is categorized as a stack-based buffer overflow, identified by CWE-121. It resides in the firewall_handler_set function, specifically affecting the index and description variables within the vtysh_ubus binary of Milesight UR32L v32.3.0.5.

The Impact of CVE-2023-25088

With a CVSS v3.1 base score of 7.2 (classified as high severity), CVE-2023-25088 poses a significant threat. Exploitation could result in critical consequences, including high confidentiality, integrity, and availability impacts. Attackers with high privileges can leverage this vulnerability to execute arbitrary code through malicious HTTP requests.

Technical Details of CVE-2023-25088

This section delves into the specifics of the vulnerability, including its description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in the vtysh_ubus binary of Milesight UR32L v32.3.0.5 arises from the utilization of an unsafe sprintf pattern, leading to multiple buffer overflow vulnerabilities. Attackers can exploit this flaw by sending specially crafted HTTP requests to trigger arbitrary code execution.

Affected Systems and Versions

Milesight UR32L v32.3.0.5 is the specific version affected by this vulnerability, with the exploit targeting the firewall_handler_set function within the vtysh_ubus binary.

Exploitation Mechanism

By sending malicious HTTP requests, attackers with high privileges can exploit the buffer overflow vulnerabilities present in the vtysh_ubus binary of Milesight UR32L v32.3.0.5 to execute arbitrary code.

Mitigation and Prevention

To safeguard systems from CVE-2023-25088, immediate action must be taken to mitigate the risk and prevent potential exploitation.

Immediate Steps to Take

Implement access controls and restrict high privilege access to mitigate the risk.
Apply security patches or updates provided by Milesight to address the vulnerability promptly.
Monitor network traffic for any suspicious HTTP requests that could indicate exploitation attempts.

Long-Term Security Practices

Regularly update and patch software to address known security vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate potential weaknesses proactively.
Educate users and administrators on secure coding practices and the importance of maintaining secure configurations.

Patching and Updates

Milesight UR32L users should prioritize installing the latest patches and updates released by the vendor to mitigate the CVE-2023-25088 vulnerability effectively. Regularly monitoring for security advisories and applying patches promptly can reduce the risk of exploitation.