CVE-2023-25085 : What You Need to Know

This CVE record was published on July 6, 2023, concerning multiple buffer overflow vulnerabilities in the Milesight UR32L v32.3.0.5. Attackers can exploit these vulnerabilities through specially crafted HTTP requests, leading to arbitrary code execution.

Understanding CVE-2023-25085

This section will provide an insight into the nature and impact of CVE-2023-25085, along with technical details essential for understanding this vulnerability.

What is CVE-2023-25085?

The CVE-2023-25085 vulnerability involves multiple buffer overflow vulnerabilities in the vtysh_ubus binary of Milesight UR32L v32.3.0.5, resulting from the use of an unsafe sprintf pattern. Attackers with high privileges can exploit this issue by sending specific HTTP requests to trigger arbitrary code execution. The buffer overflow is specifically present in the firewall_handler_set function with the index and to_dst variables.

The Impact of CVE-2023-25085

The impact of CVE-2023-25085 is significant, with a CVSS v3.1 base score of 7.2 (High). This vulnerability can be exploited remotely without user interaction, potentially allowing attackers to compromise confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2023-25085

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

Vulnerability Description

The vulnerability stems from multiple buffer overflow issues in the vtysh_ubus binary of Milesight UR32L v32.3.0.5, caused by an unsafe sprintf pattern. Exploitation can occur through specially crafted HTTP requests, enabling arbitrary code execution by attackers with elevated privileges.

Affected Systems and Versions

Only Milesight UR32L version v32.3.0.5 is affected by CVE-2023-25085. Users of this specific version are at risk of exploitation if appropriate actions are not taken to mitigate the vulnerability.

Exploitation Mechanism

Attackers with high privileges can exploit this vulnerability remotely by sending malicious HTTP requests to the affected system. This could lead to the execution of arbitrary code, potentially resulting in severe consequences for the system's integrity and security.

Mitigation and Prevention

To address CVE-2023-25085 effectively, it is crucial to implement immediate steps for mitigation and adopt long-term security practices to prevent similar vulnerabilities in the future.

Immediate Steps to Take

Update Milesight UR32L to a non-vulnerable version.
Configure strict access controls and firewall rules to limit unauthorized access.
Monitor network traffic for any suspicious activities that may indicate exploitation attempts.

Long-Term Security Practices

Regularly update and patch all software to address known vulnerabilities promptly.
Conduct security assessments and penetration testing to identify and remediate weaknesses.
Educate system administrators and users on best security practices to enhance overall cybersecurity posture.

Patching and Updates

Milesight should release a patch or update that addresses the buffer overflow vulnerabilities in vtysh_ubus within the affected version. Users are advised to apply these patches as soon as they become available to protect their systems from potential exploitation.