CVE-2018-3946 Explained : Impact and Mitigation

Foxit Software's PDF Reader version 9.1.0.5096 contains a vulnerability in its JavaScript engine that allows for remote code execution when a specific PDF document is opened. This can lead to the execution of arbitrary code, posing a significant security risk.

Understanding CVE-2018-3946

This CVE entry details a critical vulnerability in Foxit PDF Reader version 9.1.0.5096 that can be exploited to execute arbitrary code.

What is CVE-2018-3946?

An exploitable use-after-free vulnerability exists in the JavaScript engine of Foxit Software's PDF Reader version 9.1.0.5096. By manipulating a specially crafted PDF document, an attacker can trigger the reuse of a previously freed object in memory, resulting in arbitrary code execution.

The Impact of CVE-2018-3946

The vulnerability has a CVSS base score of 8 (High severity) with high impacts on confidentiality, integrity, and availability. Attackers can exploit this flaw to execute malicious code by tricking users into opening a malicious PDF file or visiting a compromised website.

Technical Details of CVE-2018-3946

Foxit PDF Reader version 9.1.0.5096 is susceptible to remote code execution due to a flaw in its JavaScript engine.

Vulnerability Description

The vulnerability allows for the reuse of a freed object in memory, leading to arbitrary code execution.

Affected Systems and Versions

Product: Foxit PDF Reader
Vendor: Foxit Software
Version: 9.1.0.5096

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: Low
User Interaction: Required
Scope: Unchanged
Exploitation involves deceiving users into opening a malicious PDF file or visiting a compromised website.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial to mitigate the risks associated with CVE-2018-3946.

Immediate Steps to Take

Disable the browser plugin extension for Foxit PDF Reader to prevent automatic execution of malicious code.
Avoid opening PDF files from untrusted or unknown sources.

Long-Term Security Practices

Regularly update Foxit PDF Reader to the latest version to patch known vulnerabilities.
Educate users about the risks of opening files from unfamiliar sources and visiting suspicious websites.
Implement network security measures to detect and block malicious PDF files.
Consider using alternative PDF readers with robust security features.

Patching and Updates

Check for and apply any available security patches or updates provided by Foxit Software to address the vulnerability.