CVE-2021-31473 : Security Advisory and Response

This CVE-2021-31473 article provides an in-depth analysis of a vulnerability found in Foxit Reader version 10.1.3.37598, allowing remote attackers to execute arbitrary code. User interaction is required for exploitation through visiting a malicious page or opening a malicious file. The vulnerability lies within the browseForDoc function, allowing attackers to execute code within the current process.

Understanding CVE-2021-31473

This section delves into the nature and implications of the CVE-2021-31473 vulnerability.

What is CVE-2021-31473?

CVE-2021-31473 is a security vulnerability in Foxit Reader version 10.1.3.37598 that permits remote attackers to execute arbitrary code by exploiting a flaw in the browseForDoc function. The lack of proper validation of user-supplied data enables attackers to write past the end of an allocated data structure.

The Impact of CVE-2021-31473

The impact of CVE-2021-31473 is significant, with a CVSS v3.0 base score of 7.8 (High). This vulnerability requires user interaction for exploitation and can lead to high confidentiality, integrity, and availability impacts.

Technical Details of CVE-2021-31473

This section covers the technical aspects of CVE-2021-31473, including the vulnerability description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

CVE-2021-31473 is categorized as CWE-787: Out-of-bounds Write, highlighting the improper handling of user-supplied data leading to code execution within the current process.

Affected Systems and Versions

The vulnerability affects Foxit Reader version 10.1.3.37598.

Exploitation Mechanism

Attackers exploit CVE-2021-31473 by enticing users to visit a malicious page or open a malevolent file, triggering the execution of arbitrary code within the target's process.

Mitigation and Prevention

This section outlines mitigation strategies and best practices to prevent exploitation of CVE-2021-31473.

Immediate Steps to Take

Users are advised to avoid visiting unknown or suspicious websites and refrain from opening files from untrusted sources to mitigate the risk associated with CVE-2021-31473.

Long-Term Security Practices

Enforcing strict data validation procedures and educating users about safe browsing practices can enhance long-term security against vulnerabilities like CVE-2021-31473.

Patching and Updates

End users should promptly apply security patches released by Foxit Reader to address CVE-2021-31473 and other potential vulnerabilities.