CVE-2023-25110 : What You Need to Know

This CVE-2023-25110 was assigned by Talos and was published on July 6, 2023. It involves multiple buffer overflow vulnerabilities in the vtysh_ubus binary of Milesight UR32L v32.3.0.5, which can result in arbitrary code execution. The vulnerability is classified under CWE-121 (Stack-based Buffer Overflow) with a CVSS base score of 7.2, indicating a high severity level.

Understanding CVE-2023-25110

This section delves into the details of CVE-2023-25110, shedding light on the nature of the vulnerability and its potential impact.

What is CVE-2023-25110?

CVE-2023-25110 refers to multiple buffer overflow vulnerabilities found in the vtysh_ubus binary of Milesight UR32L v32.3.0.5 due to an unsafe sprintf pattern. Exploitation of these vulnerabilities can allow an attacker to execute arbitrary code by sending a specially crafted HTTP request. Notably, the buffer overflow occurs in the set_gre function with the remote_virtual_ip variable.

The Impact of CVE-2023-25110

The impact of CVE-2023-25110 is significant, as successful exploitation of the vulnerability could lead to arbitrary code execution. An attacker with elevated privileges can exploit this flaw by sending malicious HTTP requests, potentially compromising the confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2023-25110

This section provides a deeper insight into the vulnerability, including its description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The vulnerability stems from the unsafe sprintf pattern in the vtysh_ubus binary of Milesight UR32L v32.3.0.5, leading to multiple buffer overflow issues. These vulnerabilities can be triggered by a specially crafted HTTP request, enabling an attacker to execute arbitrary code.

Affected Systems and Versions

The vulnerability impacts Milesight UR32L version v32.3.0.5. Systems running this specific version are at risk of exploitation through the identified buffer overflow vulnerabilities.

Exploitation Mechanism

To exploit CVE-2023-25110, an attacker with high privileges can send a crafted HTTP request to the vulnerable vtysh_ubus binary. By manipulating the remote_virtual_ip variable in the set_gre function, the attacker can trigger the buffer overflow and potentially execute arbitrary code on the target system.

Mitigation and Prevention

In response to CVE-2023-25110, taking immediate steps, implementing long-term security practices, and applying relevant patches and updates are crucial to mitigating the risk posed by this vulnerability.

Immediate Steps to Take

System administrators are advised to apply vendor-supplied patches or workarounds promptly to address the vulnerabilities in Milesight UR32L v32.3.0.5. Additionally, monitoring network traffic for signs of exploitation can aid in detecting and preventing potential attacks.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security assessments, and ensuring timely software updates can help strengthen overall security posture and mitigate the risk of buffer overflow vulnerabilities like CVE-2023-25110.

Patching and Updates

Regularly monitoring security advisories from the vendor and promptly applying patches and updates can help organizations stay protected against known vulnerabilities like the ones identified in Milesight UR32L v32.3.0.5. Ensuring that systems are up to date with the latest security measures is essential in safeguarding against potential threats.