CVE-2020-26534 : Exploit Details and Defense Strategies
Discover the use-after-free vulnerability in Foxit Reader and PhantomPDF before version 10.1. Learn the impact, affected systems, and mitigation steps for CVE-2020-26534.
An issue was discovered in Foxit Reader and PhantomPDF before 10.1, leading to an Opt object use-after-free vulnerability during AcroForm JavaScript execution.
Understanding CVE-2020-26534
This CVE identifies a specific vulnerability in Foxit Reader and PhantomPDF versions prior to 10.1.
What is CVE-2020-26534?
The vulnerability involves a use-after-free issue related to Field::ClearItems and Field::DeleteOptions during AcroForm JavaScript execution in Foxit Reader and PhantomPDF.
The Impact of CVE-2020-26534
The vulnerability could allow an attacker to execute arbitrary code or cause a denial of service by exploiting the use-after-free issue in the affected software.
Technical Details of CVE-2020-26534
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability is due to an Opt object use-after-free related to Field::ClearItems and Field::DeleteOptions during AcroForm JavaScript execution.
Affected Systems and Versions
- Product: Foxit Reader and PhantomPDF
- Versions affected: Before 10.1
Exploitation Mechanism
The vulnerability can be exploited by executing specially crafted AcroForm JavaScript code.
Mitigation and Prevention
Protecting systems from CVE-2020-26534 is crucial to maintaining security.
Immediate Steps to Take
- Update Foxit Reader and PhantomPDF to version 10.1 or later.
- Consider disabling JavaScript execution in the affected software.
Long-Term Security Practices
- Regularly update software to the latest versions to patch known vulnerabilities.
- Implement security best practices to prevent and detect potential exploits.
- Educate users on safe browsing habits and the risks associated with executing unknown scripts.
- Monitor security bulletins and updates from software vendors.
- Consider using additional security measures such as endpoint protection and intrusion detection systems.
Patching and Updates
Ensure timely installation of patches and updates provided by Foxit Software to address CVE-2020-26534.