CVE-2020-8853 : Security Advisory and Response

A vulnerability in Foxit PhantomPDF 9.7.0.29478 allows remote attackers to execute arbitrary code by exploiting the lack of proper validation in the conversion of HTML files to PDF.

Understanding CVE-2020-8853

This CVE involves a critical vulnerability in Foxit PhantomPDF 9.7.0.29478 that can lead to remote code execution.

What is CVE-2020-8853?

This vulnerability enables attackers to execute arbitrary code on affected installations of Foxit PhantomPDF 9.7.0.29478. It requires user interaction, such as visiting a malicious page or opening a malicious file. The flaw lies in the improper validation of user-supplied data during the conversion of HTML files to PDF.

The Impact of CVE-2020-8853

CVSS Score: 7.8 (High Severity)
Attack Vector: Local
User Interaction: Required
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High

Technical Details of CVE-2020-8853

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability is classified as CWE-787: Out-of-bounds Write. It allows attackers to write past the end of an allocated structure, leading to code execution in the current process.

Affected Systems and Versions

Product: Foxit PhantomPDF
Vendor: Foxit
Affected Version: 9.7.0.29478

Exploitation Mechanism

Attackers can exploit this vulnerability by tricking users into visiting a malicious page or opening a malicious file, triggering the execution of arbitrary code.

Mitigation and Prevention

Protecting systems from CVE-2020-8853 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Foxit PhantomPDF to a non-vulnerable version.
Avoid visiting untrusted websites or opening suspicious files.
Implement security awareness training to educate users about phishing attacks.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Use reputable antivirus software to detect and prevent malicious activities.
Employ network segmentation to limit the impact of potential breaches.
Conduct regular security audits and penetration testing.

Patching and Updates

Ensure that Foxit PhantomPDF is updated to a secure version to mitigate the risk of exploitation.