CVE-2020-10891 Explained : Impact and Mitigation

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PhantomPDF 9.7.0.29478. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of the Save command of the communication API. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-9831.

Understanding CVE-2020-10891

This CVE identifies a high-severity vulnerability in Foxit PhantomPDF 9.7.0.29478 that allows remote code execution.

What is CVE-2020-10891?

Remote attackers can execute arbitrary code on affected installations of Foxit PhantomPDF 9.7.0.29478.
User interaction is required for exploitation by visiting a malicious page or opening a malicious file.
The vulnerability lies in the handling of the Save command of the communication API.

The Impact of CVE-2020-10891

CVSS Base Score: 7.8 (High)
Attack Vector: Local
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Confidentiality, Integrity, and Availability Impact: High

Technical Details of CVE-2020-10891

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PhantomPDF 9.7.0.29478.
It stems from the lack of proper validation of user-supplied data, leading to a type confusion condition.

Affected Systems and Versions

Product: PhantomPDF
Vendor: Foxit
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.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate action and long-term security practices.

Immediate Steps to Take

Update Foxit PhantomPDF to a non-vulnerable version.
Avoid visiting suspicious websites or opening files from unknown sources.

Long-Term Security Practices

Regularly update software and security patches.
Educate users about safe browsing habits and file handling.

Patching and Updates

Foxit may release patches or updates to address this vulnerability.