CVE-2021-41783 : Security Advisory and Response
Learn about CVE-2021-41783 affecting Foxit PDF Reader, PDF Editor, and PhantomPDF. Find out the impact, technical details, and mitigation steps for this use-after-free vulnerability.
Foxit PDF Reader before 11.1 and PDF Editor before 11.1, and PhantomPDF before 10.1.6, allow attackers to trigger a use-after-free and execute arbitrary code because JavaScript is mishandled.
Understanding CVE-2021-41783
This CVE involves security vulnerabilities in Foxit PDF products that can be exploited by attackers to execute arbitrary code.
What is CVE-2021-41783?
Foxit PDF Reader before 11.1 and PDF Editor before 11.1, and PhantomPDF before 10.1.6 are prone to a use-after-free vulnerability due to mishandling of JavaScript, allowing malicious actors to execute arbitrary code.
The Impact of CVE-2021-41783
The vulnerability can be exploited by attackers to execute arbitrary code on affected systems, potentially leading to system compromise, data breach, or unauthorized access.
Technical Details of CVE-2021-41783
This section covers detailed technical aspects of the vulnerability.
Vulnerability Description
- Foxit PDF products are vulnerable to a use-after-free flaw caused by improper handling of JavaScript.
Affected Systems and Versions
- Products affected include Foxit PDF Reader before version 11.1, PDF Editor before version 11.1, and PhantomPDF before version 10.1.6.
Exploitation Mechanism
- Attackers can exploit this vulnerability by triggering a use-after-free condition through specially crafted JavaScript code.
Mitigation and Prevention
Effective measures to mitigate the risks associated with CVE-2021-41783.
Immediate Steps to Take
- Update Foxit PDF products to the latest versions containing security patches.
- Consider disabling JavaScript execution in the PDF reader to prevent exploitation.
Long-Term Security Practices
- Regularly update all software and applications to the latest versions to address security vulnerabilities.
- Educate users about safe browsing practices and the importance of not enabling unnecessary functionalities in PDF readers.
Patching and Updates
- Foxit has released updates addressing this vulnerability. Ensure timely patching of the affected products to eliminate the risk of exploitation.