CVE-2023-25112 : Vulnerability Insights and Analysis

This CVE record details multiple buffer overflow vulnerabilities in the vtysh_ubus binary of Milesight UR32L v32.3.0.5, leading to arbitrary code execution. An attacker with high privileges can exploit these vulnerabilities by sending specially crafted HTTP requests. The vulnerability was discovered by Francesco Benvenuto of Cisco Talos and has a high severity base score of 7.2.

Understanding CVE-2023-25112

This section will delve into what CVE-2023-25112 is, the impact it has, its technical details including vulnerability description, affected systems, and exploitation mechanism, as well as mitigation and prevention strategies.

What is CVE-2023-25112?

CVE-2023-25112 refers to multiple buffer overflow vulnerabilities present in the vtysh_ubus binary of Milesight UR32L v32.3.0.5. These vulnerabilities stem from the usage of an unsafe sprintf pattern, allowing an attacker to execute arbitrary code through malicious HTTP requests.

The Impact of CVE-2023-25112

The impact of CVE-2023-25112 is significant, as it enables an attacker to execute arbitrary code by exploiting the buffer overflow vulnerabilities. This can lead to a compromise of the confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2023-25112

This section will provide more detailed technical insights into the CVE-2023-25112 vulnerability.

Vulnerability Description

The vulnerability in CVE-2023-25112 occurs in the set_l2tp function with the remote_subnet and the remote_mask variables, resulting in multiple buffer overflow vulnerabilities due to the unsafe sprintf pattern in the vtysh_ubus binary of Milesight UR32L v32.3.0.5.

Affected Systems and Versions

The affected vendor and product for CVE-2023-25112 are Milesight UR32L with version v32.3.0.5.

Exploitation Mechanism

An attacker with high privileges can exploit CVE-2023-25112 by sending specially crafted HTTP requests to trigger the buffer overflow vulnerabilities in the set_l2tp function, leading to arbitrary code execution.

Mitigation and Prevention

This section will focus on the steps necessary to mitigate the risks posed by CVE-2023-25112 and prevent future exploitation.

Immediate Steps to Take

Immediately patching the affected system to address the vulnerabilities is crucial. Additionally, restricting network access to the vulnerable binary can help mitigate the risk of exploitation until a patch is applied.

Long-Term Security Practices

Implementing secure coding practices, regularly updating and patching software vulnerabilities, and maintaining network security measures can enhance the long-term security posture of the system.

Patching and Updates

Vendor-supplied patches and updates should be applied promptly to address the buffer overflow vulnerabilities in the vtysh_ubus binary of Milesight UR32L v32.3.0.5 and prevent potential exploitation.