CVE-2018-3850 : What You Need to Know

Foxit PDF Reader version 9.0.1.1049 contains a critical vulnerability in its JavaScript engine that can lead to remote code execution when a specific PDF file is opened. This CVE was published on April 19, 2018, by Talos.

Understanding CVE-2018-3850

This CVE involves a use-after-free vulnerability in Foxit PDF Reader version 9.0.1.1049, allowing an attacker to execute arbitrary code by exploiting the JavaScript engine.

What is CVE-2018-3850?

The vulnerability arises from reusing a freed object in memory when opening a malicious PDF file in Foxit PDF Reader.
Attackers can achieve arbitrary code execution by tricking users into opening the malicious file or visiting a malicious website with a browser plugin extension enabled.

The Impact of CVE-2018-3850

CVSS Score: 8.8 (High)
Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Confidentiality, Integrity, and Availability Impact: High

Technical Details of CVE-2018-3850

Foxit PDF Reader version 9.0.1.1049 vulnerability details:

Vulnerability Description

The vulnerability allows attackers to trigger a previously freed object in memory, leading to arbitrary code execution.

Affected Systems and Versions

Product: Foxit PDF Reader
Vendor: Talos
Affected Version: Foxit PDF Reader 9.0.1.1049

Exploitation Mechanism

Attackers exploit the vulnerability by deceiving users into opening a malicious PDF file or visiting a malicious website with a browser plugin extension enabled.

Mitigation and Prevention

Protect your systems from CVE-2018-3850 with the following steps:

Immediate Steps to Take

Update Foxit PDF Reader to a patched version.
Avoid opening PDF files from untrusted or unknown sources.
Disable browser plugin extensions if not necessary.

Long-Term Security Practices

Regularly update software and applications to patch known vulnerabilities.
Educate users on safe browsing practices and the risks associated with opening unknown files.

Patching and Updates

Check for security updates from Foxit and apply them promptly to mitigate the vulnerability.