CVE-2023-1196 Explained : Impact and Mitigation

This CVE record pertains to an issue identified as "Advanced Custom Fields - Contributor+ PHP Object Injection" affecting the Advanced Custom Fields (ACF) Free and Pro WordPress plugins versions 5.x prior to 5.12.5 and 6.x before 6.1.0. The vulnerability involves the unserialize user-controllable data, potentially enabling users with a role of Contributor and above to execute PHP Object Injection given the presence of a suitable gadget.

Understanding CVE-2023-1196

This section delves deeper into the nature and implications of CVE-2023-1196.

What is CVE-2023-1196?

CVE-2023-1196 is a PHP Object Injection vulnerability found in the Advanced Custom Fields Free and Pro WordPress plugins. It allows users with certain roles to manipulate user-controllable data, leading to potential injection of PHP objects under specific conditions.

The Impact of CVE-2023-1196

The impact of CVE-2023-1196 is significant as it could enable malicious users with appropriate permissions to execute arbitrary PHP code within the context of the affected plugin, potentially leading to unauthorized actions and compromise of the WordPress site.

Technical Details of CVE-2023-1196

In this section, we will explore the technical aspects of CVE-2023-1196, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in the Advanced Custom Fields Free and Pro plugins arises from the improper handling of user-controllable data during the deserialization process. This flaw allows an attacker with Contributor-level access or higher to inject malicious PHP objects into the application.

Affected Systems and Versions

The Advanced Custom Fields (ACF) Free and Pro WordPress plugins versions 5.x up to 5.12.5 and 6.x up to 6.1.0 are affected by this vulnerability. Users utilizing these specific versions are at risk of exploitation unless appropriate mitigations are applied.

Exploitation Mechanism

Exploiting CVE-2023-1196 involves crafting and injecting malicious PHP objects via the user-controllable data deserialization process within the affected Advanced Custom Fields plugins. Attackers can potentially leverage this vulnerability to execute arbitrary code within the WordPress environment.

Mitigation and Prevention

This section focuses on the measures that can be taken to mitigate the risks associated with CVE-2023-1196 and prevent potential exploitation.

Immediate Steps to Take

It is crucial for users of the Advanced Custom Fields (ACF) Free and Pro plugins to update to versions 5.12.5 and 6.1.0 or newer to address the PHP Object Injection vulnerability. Additionally, restricting access privileges and monitoring for any suspicious activities can help reduce the likelihood of exploitation.

Long-Term Security Practices

Implementing robust security practices such as regular security audits, staying informed about plugin vulnerabilities, and maintaining up-to-date software can enhance the overall security posture of WordPress websites. Training users on security best practices is also essential to prevent future incidents.

Patching and Updates

Regularly applying security patches and updates provided by plugin developers is critical to addressing known vulnerabilities like CVE-2023-1196. Keeping plugins and themes up-to-date ensures that your WordPress site is fortified against potential security risks.

By understanding the implications of CVE-2023-1196 and following the recommended mitigation strategies, website owners can safeguard their online assets from potential exploitation and security breaches.