CVE-2023-25098 : Security Advisory and Response

This CVE-2023-25098 was published on July 6, 2023, and affects Milesight UR32L v32.3.0.5. It involves multiple buffer overflow vulnerabilities in the vtysh_ubus binary, potentially leading to arbitrary code execution.

Understanding CVE-2023-25098

This section delves into the details of CVE-2023-25098, its impact, technical aspects, and mitigation strategies.

What is CVE-2023-25098?

CVE-2023-25098 pertains to multiple buffer overflow vulnerabilities present in the vtysh_ubus binary of Milesight UR32L v32.3.0.5. These vulnerabilities are caused by an unsafe sprintf pattern, where a specially crafted HTTP request can trigger arbitrary code execution. The buffer overflow specifically occurs in the set_qos function with the source variable.

The Impact of CVE-2023-25098

The impact of this CVE is significant, with the potential for an attacker with high privileges to exploit the vulnerabilities by sending malicious HTTP requests. The exploitation can result in arbitrary code execution, posing a severe risk to the confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2023-25098

To better understand CVE-2023-25098, it is crucial to grasp the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability stems from the improper handling of input in the vtysh_ubus binary, leading to stack-based buffer overflow issues. This vulnerability enables an attacker to execute arbitrary code by sending specially crafted HTTP requests.

Affected Systems and Versions

Milesight UR32L v32.3.0.5 is the specific version impacted by CVE-2023-25098 due to the presence of multiple buffer overflow vulnerabilities in the vtysh_ubus binary.

Exploitation Mechanism

Exploiting CVE-2023-25098 involves crafting malicious HTTP requests to trigger the buffer overflow vulnerabilities present in the set_qos function within the affected version, ultimately leading to arbitrary code execution.

Mitigation and Prevention

Addressing CVE-2023-25098 requires immediate action to mitigate the risks posed by the vulnerabilities. Implementing robust security practices, applying patches, and taking proactive measures are essential to safeguard systems.

Immediate Steps to Take

Upon discovering CVE-2023-25098, organizations must promptly apply security patches provided by the vendor to remediate the buffer overflow vulnerabilities in Milesight UR32L v32.3.0.5. Additionally, restricting network access and monitoring HTTP requests are recommended to prevent exploitation.

Long-Term Security Practices

To enhance overall system security, organizations should prioritize regular security audits, vulnerability assessments, and employee training on safe coding practices. Maintaining up-to-date software versions and monitoring security advisories are vital for proactive defense against potential threats.

Patching and Updates

Regularly checking for and applying software updates, especially security patches released by the vendor, is crucial in safeguarding systems against known vulnerabilities like CVE-2023-25098. Timely patch management helps mitigate risks and strengthens the overall security posture of the organization.