CVE-2023-25114 : Exploit Details and Defense Strategies

This CVE record was published on July 6, 2023, by Talos and involves multiple buffer overflow vulnerabilities in the vtysh_ubus binary of Milesight UR32L v32.3.0.5. These vulnerabilities can be exploited by an attacker to achieve arbitrary code execution through a specially crafted HTTP request.

Understanding CVE-2023-25114

This section will provide detailed insights into the nature and impact of CVE-2023-25114.

What is CVE-2023-25114?

CVE-2023-25114 refers to multiple buffer overflow vulnerabilities present in the vtysh_ubus binary of Milesight UR32L v32.3.0.5. These vulnerabilities arise due to the utilization of an unsafe sprintf pattern, allowing an attacker with high privileges to execute arbitrary code by sending malicious HTTP requests.

The Impact of CVE-2023-25114

The impact of CVE-2023-25114 is significant as it enables attackers to exploit the buffer overflow in the set_openvpn_client function, specifically with the expert_options variable. This can lead to severe consequences such as unauthorized code execution and potentially compromising system integrity.

Technical Details of CVE-2023-25114

In this section, we will delve into the technical aspects of CVE-2023-25114, including the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability in the vtysh_ubus binary of Milesight UR32L v32.3.0.5 is classified as CWE-121: Stack-based Buffer Overflow. This type of vulnerability allows attackers to overwrite memory beyond the intended buffer, leading to potential code execution.

Affected Systems and Versions

The specific affected system for CVE-2023-25114 is the Milesight UR32L running version v32.3.0.5. Users of this version are at risk of exploitation if proper mitigation measures are not implemented promptly.

Exploitation Mechanism

By sending specially crafted HTTP requests, attackers can exploit the buffer overflow vulnerabilities in the set_openvpn_client function of the vtysh_ubus binary. This manipulation can result in the execution of arbitrary code with elevated privileges.

Mitigation and Prevention

To safeguard systems from the risks posed by CVE-2023-25114, it is crucial to adopt proactive security measures and follow best practices for vulnerability management.

Immediate Steps to Take

Immediate steps to mitigate the impact of CVE-2023-25114 include applying security patches provided by the vendor, restricting network access to vulnerable services, and monitoring network traffic for suspicious activities.

Long-Term Security Practices

Implementing a robust security posture involves regularly updating software, conducting security assessments, training staff on safe computing practices, and maintaining an incident response plan to address potential security breaches effectively.

Patching and Updates

Vendor-supplied patches and updates play a vital role in addressing vulnerabilities like CVE-2023-25114. It is essential for users to stay informed about security advisories from software providers and promptly apply patches to ensure system security and integrity.