CVE-2020-26539 : Exploit Details and Defense Strategies

An issue was discovered in Foxit Reader and PhantomPDF before 10.1, leading to a use-after-free vulnerability that can result in remote code execution or information leaks.

Understanding CVE-2020-26539

This CVE identifies a critical security flaw in Foxit Reader and PhantomPDF versions prior to 10.1.

What is CVE-2020-26539?

The vulnerability in Foxit Reader and PhantomPDF before 10.1 allows for a use-after-free scenario when encountering a multiple interpretation error for /V in the Additional Action and Field dictionaries. This can lead to remote code execution or information leakage.

The Impact of CVE-2020-26539

The exploitation of this vulnerability can result in severe consequences, including unauthorized remote code execution or potential information disclosure.

Technical Details of CVE-2020-26539

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The use-after-free vulnerability in Foxit Reader and PhantomPDF before 10.1 arises from a multiple interpretation error for /V in the Additional Action and Field dictionaries.

Affected Systems and Versions

Product: Foxit Reader and PhantomPDF
Versions: Before 10.1

Exploitation Mechanism

The vulnerability can be exploited by triggering a multiple interpretation error for /V in the Additional Action and Field dictionaries, leading to a use-after-free scenario.

Mitigation and Prevention

Protecting systems from CVE-2020-26539 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Foxit Reader and PhantomPDF to version 10.1 or later.
Monitor for any unusual activities on the affected systems.

Long-Term Security Practices

Regularly update software and applications to the latest versions.
Implement robust security measures to prevent and detect potential vulnerabilities.

Patching and Updates

Apply patches and security updates provided by Foxit Software to address the CVE-2020-26539 vulnerability.