CVE-2023-25082 : Vulnerability Insights and Analysis

This CVE record was assigned by Talos and published on July 6, 2023, for a vulnerability found in the Milesight UR32L v32.3.0.5 product.

Understanding CVE-2023-25082

This section delves into the details of CVE-2023-25082, shedding light on what the vulnerability entails and its potential impact.

What is CVE-2023-25082?

CVE-2023-25082 refers to multiple buffer overflow vulnerabilities found in the vtysh_ubus binary of Milesight UR32L v32.3.0.5. These vulnerabilities arise due to the utilization of an unsafe sprintf pattern. Attackers with high privileges can exploit a specially crafted HTTP request to execute arbitrary code. The specific buffer overflow occurs within the firewall_handler_set function involving the old_ip and old_mac variables.

The Impact of CVE-2023-25082

The impact of CVE-2023-25082 is deemed severe as it could allow attackers to remotely execute arbitrary code on affected systems. This can lead to a compromise of confidentiality, integrity, and availability, posing significant risks to the security of the system and its data.

Technical Details of CVE-2023-25082

In this section, we will explore the technical aspects of CVE-2023-25082, including vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability in CVE-2023-25082 is classified as CWE-121: Stack-based Buffer Overflow. It occurs due to the unsafe sprintf pattern used in the vtysh_ubus binary of Milesight UR32L v32.3.0.5, allowing for arbitrary code execution via malicious HTTP requests.

Affected Systems and Versions

The affected product is the Milesight UR32L running version v32.3.0.5. Systems utilizing this specific version are vulnerable to the buffer overflow issue identified in the firewall_handler_set function.

Exploitation Mechanism

To exploit CVE-2023-25082, an attacker with high privileges can craft and send malicious HTTP requests to the vulnerable vtysh_ubus binary. By triggering the buffer overflow within the firewall_handler_set function, the attacker can achieve arbitrary code execution on the target system.

Mitigation and Prevention

This section provides insights into mitigating the risks associated with CVE-2023-25082, offering immediate steps to take and long-term security practices.

Immediate Steps to Take

Implement security patches or updates provided by Milesight to address the buffer overflow vulnerabilities in UR32L v32.3.0.5.
Restrict network access to mitigate the risk of remote exploitation.
Monitor network traffic for any signs of malicious activity targeting the vulnerable component.

Long-Term Security Practices

Regularly update and patch software and firmware to address known vulnerabilities.
Conduct regular security assessments and penetration testing to identify and remediate potential weaknesses.
Educate system administrators and users on secure coding practices and the importance of cyber hygiene.

Patching and Updates

Milesight should release patches or updates specifically targeting the buffer overflow vulnerabilities in the vtysh_ubus binary of UR32L v32.3.0.5. It is crucial for organizations using the affected product to apply these patches promptly to safeguard their systems against potential exploitation.