CVE-2023-26036 Explained : Impact and Mitigation

This CVE record discusses a Local File Inclusion vulnerability found in ZoneMinder, an open-source Closed-circuit television software application for Linux. The vulnerability affects versions prior to 1.36.33 and 1.37.33, allowing attackers to execute arbitrary files through improper path sanitization.

Understanding CVE-2023-26036

This section delves into the details of the CVE-2023-26036 vulnerability in ZoneMinder, highlighting its impact, technical aspects, affected systems, and prevention measures.

What is CVE-2023-26036?

ZoneMinder, a CCTV software for Linux, is vulnerable to Local File Inclusion due to improper path sanitization. Attackers can exploit this flaw by manipulating the $view parameter in /web/index.php to execute arbitrary PHP files. Even though detaintPath is intended to mitigate this, it fails to adequately protect the path, allowing the construction of exploitable paths like "..././".

The Impact of CVE-2023-26036

The exploitation of the Local File Inclusion vulnerability in ZoneMinder versions prior to 1.36.33 and 1.37.33 can lead to a high impact on confidentiality and integrity. Attackers with low privileges can execute arbitrary PHP files, potentially leading to data breaches and system compromise.

Technical Details of CVE-2023-26036

In this section, we explore the specific technicalities of CVE-2023-26036, including its vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The Local File Inclusion vulnerability in ZoneMinder versions before 1.36.33 and 1.37.33 allows attackers to execute arbitrary PHP files by manipulating the $view parameter in /web/index.php. Despite attempts to sanitize paths with detaintPath, the vulnerability permits the construction of exploitable paths.

Affected Systems and Versions

ZoneMinder versions earlier than 1.36.33 and 1.37.33 are vulnerable to the Local File Inclusion issue. Specifically, versions "< 1.36.33" and ">= 1.37.0, < 1.37.33" are impacted, exposing systems to potential exploitation.

Exploitation Mechanism

By leveraging the improper path sanitization in ZoneMinder's /web/index.php, attackers can control the $view parameter to execute arbitrary PHP files. This manipulation enables threat actors to access sensitive system files and compromise the security and functionality of the software.

Mitigation and Prevention

This section provides insights into how organizations and users can mitigate the risks associated with CVE-2023-26036, outlining immediate steps, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

To address the Local File Inclusion vulnerability in ZoneMinder, users should upgrade to the patched versions, 1.36.33 and 1.37.33, as soon as possible. Additionally, implementing proper input validation and output encoding can help prevent similar exploits in the future.

Long-Term Security Practices

Maintaining a robust security posture by regularly updating software, conducting security assessments, and educating users on safe coding practices can enhance the overall resilience of systems against vulnerabilities like CVE-2023-26036.

Patching and Updates

ZoneMinder has released patched versions, 1.36.33 and 1.37.33, to address the Local File Inclusion vulnerability. Organizations are advised to promptly apply these updates to secure their ZoneMinder installations and protect against potential exploitation.