CVE-2023-24019 : Exploit Details and Defense Strategies

This article provides insights into CVE-2023-24019, a stack-based buffer overflow vulnerability affecting Milesight UR32L v32.3.0.5.

Understanding CVE-2023-24019

CVE-2023-24019 is a critical vulnerability impacting the urvpn_client http_connection_readcb functionality of Milesight UR32L v32.3.0.5. An attacker can exploit this issue using a specially crafted network packet to trigger a buffer overflow.

What is CVE-2023-24019?

The vulnerability identified as CVE-2023-24019 is categorized as a stack-based buffer overflow, which falls under the CWE-120 classification. This type of vulnerability occurs when a program copies data into a stack buffer without checking the input size, leading to potential exploitation by malicious actors.

The Impact of CVE-2023-24019

With a CVSSv3 base score of 8.1, CVE-2023-24019 poses a significant threat. The attack vector is through the network, with high complexity and no special privileges required. The confidentiality, integrity, and availability of the affected system are all rated as high impact, indicating severe consequences if exploited.

Technical Details of CVE-2023-24019

The following details shed light on the specifics of CVE-2023-24019:

Vulnerability Description

The vulnerability arises in the urvpn_client http_connection_readcb functionality of Milesight UR32L v32.3.0.5 due to a stack-based buffer overflow issue. By sending a specially crafted network packet, an attacker can trigger the buffer overflow, potentially leading to arbitrary code execution.

Affected Systems and Versions

Milesight UR32L v32.3.0.5 is the specific product and version impacted by CVE-2023-24019, exposing systems with this configuration to the associated risks.

Exploitation Mechanism

Exploiting this vulnerability involves crafting a malicious network packet and sending it to the affected urvpn_client http_connection_readcb functionality. This action triggers the stack-based buffer overflow, allowing the attacker to execute unauthorized commands and compromise system security.

Mitigation and Prevention

Safeguarding your systems from CVE-2023-24019 requires proactive measures to mitigate the risks posed by this vulnerability.

Immediate Steps to Take

Immediately apply any available patches or security updates provided by the vendor to address CVE-2023-24019. Additionally, consider implementing network-level protections and monitoring to detect and prevent exploitation attempts.

Long-Term Security Practices

Incorporate secure coding practices within your software development lifecycle to prevent buffer overflow vulnerabilities like CVE-2023-24019. Regular security assessments, penetration testing, and employee training can also enhance overall cybersecurity posture.

Patching and Updates

Regularly check for updates and patches from the vendor to address known vulnerabilities like CVE-2023-24019. Timely implementation of these updates is crucial in reducing the risk of exploitation and strengthening the security of your systems.