CVE-2023-25106 Explained : Impact and Mitigation

This is a detailed overview of CVE-2023-25106, including its description, impact, technical details, mitigation, and prevention measures.

Understanding CVE-2023-25106

CVE-2023-25106 is a vulnerability that affects the Milesight UR32L v32.3.0.5 device. It involves multiple buffer overflow vulnerabilities in the vtysh_ubus binary, which can potentially lead to arbitrary code execution by exploiting a specially crafted HTTP request.

What is CVE-2023-25106?

The vulnerability in CVE-2023-25106 is caused by unsafe sprintf pattern usage in the Milesight UR32L v32.3.0.5 device's vtysh_ubus binary. An attacker with high privileges can exploit this flaw by sending malicious HTTP requests, particularly targeting the set_gre function with specific variables.

The Impact of CVE-2023-25106

With a CVSS v3.1 base score of 7.2 and a severity rating of "HIGH," this vulnerability can have significant implications. It poses a threat to the confidentiality, integrity, and availability of the affected system, making it crucial to address promptly.

Technical Details of CVE-2023-25106

The technical aspects of CVE-2023-25106 shed light on the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability revolves around multiple buffer overflow flaws in the vtysh_ubus binary of Milesight UR32L v32.3.0.5, triggered by an unsafe sprintf pattern. It can be exploited through specially crafted HTTP requests, potentially enabling arbitrary code execution.

Affected Systems and Versions

Milesight UR32L devices running version v32.3.0.5 are impacted by this vulnerability due to the specific implementation issues in the vtysh_ubus binary.

Exploitation Mechanism

By utilizing a crafted HTTP request, an attacker with high privileges can exploit the buffer overflow vulnerabilities in the set_gre function, targeting the local_virtual_ip and local_virtual_mask variables to achieve arbitrary code execution.

Mitigation and Prevention

Addressing CVE-2023-25106 necessitates immediate action to mitigate the risks posed by this vulnerability and prevent potential exploits.

Immediate Steps to Take

Users of the affected Milesight UR32L v32.3.0.5 devices should apply security patches provided by the vendor promptly to remediate the vulnerability and enhance system security.

Long-Term Security Practices

Implementing robust security measures, such as network segmentation, access controls, and regular security audits, can help enhance the overall security posture of the system and prevent future vulnerabilities.

Patching and Updates

Regularly monitoring for security updates and patches from the vendor, along with timely implementation of these updates, is crucial to staying protected against known vulnerabilities and ensuring the security of the system.