CVE-2023-25107 : Vulnerability Insights and Analysis

This CVE-2023-25107 involves multiple buffer overflow vulnerabilities in the vtysh_ubus binary of Milesight UR32L v32.3.0.5, leading to arbitrary code execution through specially crafted HTTP requests. An attacker with high privileges can exploit these vulnerabilities by sending HTTP requests, particularly affecting the set_gre function with specific variables.

Understanding CVE-2023-25107

This section delves into the details of CVE-2023-25107, exploring its impact, technical aspects, and mitigation strategies.

What is CVE-2023-25107?

CVE-2023-25107 relates to buffer overflow vulnerabilities in the vtysh_ubus binary of Milesight UR32L v32.3.0.5, resulting from an unsafe sprintf pattern. These vulnerabilities can be exploited by a malicious actor through crafted HTTP requests, potentially enabling arbitrary code execution.

The Impact of CVE-2023-25107

With a CVSSv3.1 base score of 7.2 (High Severity), this vulnerability's impact is significant. The confidentiality, integrity, and availability of affected systems are at risk, especially when exploited by an attacker with high privileges via HTTP requests.

Technical Details of CVE-2023-25107

This section provides a deeper dive into the vulnerability's technical aspects, affected systems, and exploitation mechanisms.

Vulnerability Description

The vulnerability stems from the unsafe sprintf pattern in the vtysh_ubus binary of Milesight UR32L v32.3.0.5, leading to buffer overflow in the set_gre function with specific variables like remote_subnet and remote_mask.

Affected Systems and Versions

The vulnerability affects Milesight UR32L version v32.3.0.5 due to the presence of buffer overflow vulnerabilities in the vtysh_ubus binary.

Exploitation Mechanism

Exploitation of CVE-2023-25107 involves crafting malicious HTTP requests targeting vulnerable components in the Milesight UR32L version v32.3.0.5, enabling attackers to execute arbitrary code.

Mitigation and Prevention

To address CVE-2023-25107 effectively, proactive steps should be taken to mitigate risks and prevent potential exploitation.

Immediate Steps to Take

Update Milesight UR32L to a patched version that addresses the buffer overflow vulnerabilities in the vtysh_ubus binary.
Implement network-level protections to filter and block potentially malicious HTTP requests targeting the vulnerable components.

Long-Term Security Practices

Regularly monitor and update systems to ensure the latest security patches are applied promptly.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security advisories and updates provided by Milesight for UR32L to promptly apply patches addressing CVE-2023-25107 and other potential security issues.