CVE-2020-26535 : What You Need to Know

An issue was discovered in Foxit Reader and PhantomPDF before 10.1 that can lead to write and read access violations.

Understanding CVE-2020-26535

This CVE identifies a vulnerability in Foxit Reader and PhantomPDF that can result in access violations.

What is CVE-2020-26535?

The vulnerability occurs when TslAlloc attempts to allocate thread local storage with an unacceptable index value, triggering an exception in V8 that can lead to write and read access violations.

The Impact of CVE-2020-26535

The vulnerability can potentially allow attackers to exploit the application, leading to unauthorized write and read access violations.

Technical Details of CVE-2020-26535

This section provides technical details of the vulnerability.

Vulnerability Description

The issue arises in Foxit Reader and PhantomPDF before version 10.1 due to an exception thrown by V8 when TslAlloc allocates thread local storage with an unacceptable index value.

Affected Systems and Versions

Product: Foxit Reader and PhantomPDF
Vendor: Foxit Software
Versions affected: Before 10.1

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the thread local storage allocation process to trigger the exception in V8, leading to access violations.

Mitigation and Prevention

Protecting systems from CVE-2020-26535 is crucial to maintaining security.

Immediate Steps to Take

Update Foxit Reader and PhantomPDF to version 10.1 or newer to mitigate the vulnerability.
Monitor for any unusual activities that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update software and applications to the latest versions to address known vulnerabilities.
Implement robust security measures to prevent unauthorized access to sensitive data.

Patching and Updates

Stay informed about security bulletins and patches released by Foxit Software to address CVE-2020-26535.