CVE-2023-23571 Explained : Impact and Mitigation

This is a detailed analysis of CVE-2023-23571, which is an access violation vulnerability affecting Milesight UR32L v32.3.0.5, with the potential for denial of service through a specially crafted network request.

Understanding CVE-2023-23571

CVE-2023-23571 is a security vulnerability identified in the eventcore functionality of Milesight UR32L v32.3.0.5. It can be exploited by an attacker by sending a malicious network request, leading to a denial of service condition.

What is CVE-2023-23571?

The vulnerability is classified under CWE-126: Buffer Over-read, indicating the potential for the attacker to read data beyond the boundaries of an allocated memory buffer. In this case, it allows for unauthorized access through a crafted network request.

The Impact of CVE-2023-23571

The vulnerability poses a significant risk as it can result in a denial of service, disrupting the normal functionality of the affected system. An attacker exploiting this flaw can potentially cause service downtime and impact the availability of the system.

Technical Details of CVE-2023-23571

The CVSS v3.1 base score for CVE-2023-23571 is 7.5, indicating a high severity level. The vector string highlights that the attack vector is through the network with low complexity and does not require any privileges or user interaction. The impact is primarily on the availability of the system.

Vulnerability Description

The access violation vulnerability in the eventcore functionality of Milesight UR32L v32.3.0.5 allows an attacker to trigger a denial of service condition by sending a specially crafted network request.

Affected Systems and Versions

Vendor: Milesight
Product: UR32L
Affected Version: v32.3.0.5

Exploitation Mechanism

By sending a malicious network request to the vulnerable eventcore functionality, an attacker can exploit the buffer over-read vulnerability and cause a denial of service on the affected system.

Mitigation and Prevention

To address CVE-2023-23571 and mitigate the risks associated with this vulnerability, it is crucial to take immediate action and implement robust security measures.

Immediate Steps to Take

Network administrators should apply patches or updates provided by Milesight to fix the vulnerability.
Implement network-level protections to filter out potentially malicious network requests.
Monitor network traffic for any suspicious activity that might indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update and patch all software and firmware to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate any security weaknesses.
Educate users and system administrators on best security practices to prevent future vulnerabilities.

Patching and Updates

Stay informed about security advisories from Milesight and promptly apply any patches or updates released to address CVE-2023-23571 and other potential security threats.