CVE-2023-25113 : Security Advisory and Response

This CVE record outlines a critical vulnerability identified in the Milesight UR32L v32.3.0.5 which could potentially lead to arbitrary code execution.

Understanding CVE-2023-25113

This section delves into the specifics of CVE-2023-25113, shedding light on its nature and implications.

What is CVE-2023-25113?

CVE-2023-25113 is characterized by multiple buffer overflow vulnerabilities encountered in the vtysh_ubus binary of Milesight UR32L v32.3.0.5. These vulnerabilities stem from the utilization of an unsafe sprintf pattern. The exploit can be triggered by a meticulously crafted HTTP request, potentially enabling an attacker with elevated privileges to execute arbitrary code. The buffer overflow is particularly observed in the set_l2tp function with the key variable.

The Impact of CVE-2023-25113

The impact of this vulnerability is severe, with a CVSSv3.1 base score of 7.2 (High severity). The confidentiality, integrity, and availability of the affected system are all at risk, necessitating immediate attention.

Technical Details of CVE-2023-25113

This section dissects the technical aspects of CVE-2023-25113 to provide a comprehensive understanding of the vulnerability.

Vulnerability Description

The vulnerability, classified under CWE-121 (Stack-based Buffer Overflow), arises due to inadequate input validation in the vtysh_ubus binary of Milesight UR32L v32.3.0.5. The unsafe sprintf pattern paves the way for malicious actors to exploit the system.

Affected Systems and Versions

The buffer overflow vulnerabilities impact the Milesight UR32L version 32.3.0.5, making systems with this configuration susceptible to exploitation.

Exploitation Mechanism

By sending specially crafted HTTP requests, threat actors can trigger the buffer overflow vulnerabilities in the set_l2tp function, potentially leading to arbitrary code execution.

Mitigation and Prevention

To address CVE-2023-25113 and bolster system security, certain measures need to be undertaken promptly.

Immediate Steps to Take

Organizations using the affected version of Milesight UR32L should consider applying patches or updates provided by the vendor.
Network administrators must implement robust access control measures to limit the impact of potential exploits.
It is advisable to monitor network traffic for any suspicious activity that could indicate exploitation attempts.

Long-Term Security Practices

Regular security audits and penetration testing can help organizations identify and rectify vulnerabilities proactively.
Encouraging best practices in secure coding and input validation can minimize the risk of buffer overflow vulnerabilities in the future.

Patching and Updates

Stay abreast of security advisories from Milesight regarding CVE-2023-25113 and promptly apply any patches or updates released to mitigate the risk of exploitation.