CVE-2020-10889 : Exploit Details and Defense Strategies

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 DuplicatePages 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-9828.

Understanding CVE-2020-10889

This CVE-2020-10889 vulnerability in Foxit PhantomPDF 9.7.0.29478 poses a high risk due to the potential execution of arbitrary code by remote attackers.

What is CVE-2020-10889?

Remote attackers can execute arbitrary code on affected installations of Foxit PhantomPDF 9.7.0.29478
User interaction is required, such as visiting a malicious page or opening a malicious file
The vulnerability lies in the handling of the DuplicatePages command of the communication API

The Impact of CVE-2020-10889

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-2020-10889

This section provides detailed technical information about the CVE-2020-10889 vulnerability.

Vulnerability Description

The vulnerability allows remote attackers to execute arbitrary code
It stems from the lack of proper validation of user-supplied data
Exploitation requires user interaction to visit a malicious page or open a malicious file

Affected Systems and Versions

Product: PhantomPDF
Vendor: Foxit
Version: 9.7.0.29478

Exploitation Mechanism

Attackers exploit the handling of the DuplicatePages command in the communication API
Lack of validation of user-supplied data leads to a type confusion condition
Successful exploitation allows code execution in the current process

Mitigation and Prevention

Protecting systems from CVE-2020-10889 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Foxit PhantomPDF to a non-vulnerable version
Avoid visiting suspicious or untrusted websites
Be cautious when opening files from unknown sources

Long-Term Security Practices

Regularly update software and security patches
Implement robust cybersecurity measures to prevent code execution vulnerabilities

Patching and Updates

Foxit may release patches or updates to address this vulnerability
Stay informed about security bulletins and advisories from Foxit and relevant sources