CVE-2023-27379 : Exploit Details and Defense Strategies

This CVE-2023-27379 was assigned by Cisco Talos and affects Foxit Reader version 12.1.2.15332. The vulnerability involves a use-after-free vulnerability in the JavaScript engine of Foxit Software's PDF Reader. By exploiting this vulnerability, an attacker could execute arbitrary code by tricking a user into opening a specially crafted PDF document or visiting a malicious site with the browser plugin extension enabled.

Understanding CVE-2023-27379

This section delves into the details of CVE-2023-27379, its impact, technical description, affected systems, and mitigation strategies.

What is CVE-2023-27379?

CVE-2023-27379 is a use-after-free vulnerability in Foxit Reader's JavaScript engine, allowing attackers to execute arbitrary code by exploiting memory reuse triggered by a specially crafted PDF document.

The Impact of CVE-2023-27379

The impact of this vulnerability is rated as HIGH with a CVSSv3.1 base score of 8.8. It can lead to arbitrary code execution, posing a significant risk to confidentiality, integrity, and availability of affected systems.

Technical Details of CVE-2023-27379

Understanding the specific technical aspects of CVE-2023-27379 is crucial for effective mitigation and prevention.

Vulnerability Description

The vulnerability arises from a use-after-free issue in Foxit Reader's JavaScript engine, where prematurely deleted objects associated with pages can lead to the reuse of freed memory, enabling arbitrary code execution.

Affected Systems and Versions

Foxit Reader version 12.1.2.15332 is impacted by this vulnerability. Users of this specific version should be cautious when handling PDF documents to prevent potential exploitation.

Exploitation Mechanism

Attackers can exploit this vulnerability by enticing users to open a malicious PDF document or visit a specially crafted, malicious website with the browser plugin extension enabled, ultimately triggering arbitrary code execution.

Mitigation and Prevention

To safeguard systems from the risks associated with CVE-2023-27379, prompt actions need to be taken to mitigate the potential threats and prevent exploitation.

Immediate Steps to Take

Users should avoid opening untrusted PDF documents or visiting suspicious websites to minimize the risk of falling victim to this vulnerability. Disabling the browser plugin extension can also help mitigate the exploitation possibility.

Long-Term Security Practices

Implementing a robust security awareness program, keeping software up to date with the latest patches, and employing proactive security measures can enhance overall cybersecurity posture and reduce the likelihood of successful attacks.

Patching and Updates

Foxit Software should release a patch addressing the use-after-free vulnerability in Foxit Reader version 12.1.2.15332 to rectify the underlying security issue and protect users from potential threats. Regularly updating software is crucial to staying protected against known vulnerabilities.