CVE-2021-38573 : Security Advisory and Response

A vulnerability has been identified in Foxit Reader and PhantomPDF before version 10.1.4, allowing an attacker to write to arbitrary files due to a lack of validation in CombineFiles pathname.

Understanding CVE-2021-38573

This vulnerability affects Foxit Reader and PhantomPDF versions prior to 10.1.4. Attackers can exploit this issue to write to arbitrary files by leveraging the inadequate pathname validation in CombineFiles.

What is CVE-2021-38573?

CVE-2021-38573 is a security flaw found in Foxit Reader and PhantomPDF software versions earlier than 10.1.4. It enables malicious actors to overwrite arbitrary files since the CombineFiles pathname is not properly validated.

The Impact of CVE-2021-38573

This vulnerability can be exploited by threat actors to write to any file they desire, potentially leading to unauthorized modification or disclosure of sensitive data stored on the system.

Technical Details of CVE-2021-38573

Foxit Reader and PhantomPDF versions before 10.1.4 are affected by a flaw that allows attackers to write to arbitrary files due to the absence of proper validation in the CombineFiles pathname.

Vulnerability Description

The vulnerability in CVE-2021-38573 enables attackers to manipulate file writing operations through improper validation checks, resulting in unauthorized access to and modification of files on the system.

Affected Systems and Versions

Foxit Reader and PhantomPDF software versions earlier than 10.1.4 are impacted by this vulnerability, exposing systems running these versions to the risk of file overwriting attacks.

Exploitation Mechanism

By exploiting the inadequate validation of CombineFiles pathname, threat actors can craft malicious files to write arbitrary content to any file accessible by the vulnerable software, potentially leading to unauthorized access and data breaches.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-38573, it is crucial to take immediate action and implement security measures to safeguard systems from potential exploitation.

Immediate Steps to Take

Users should update Foxit Reader and PhantomPDF to version 10.1.4 or later to prevent exploitation of this vulnerability. It is recommended to apply patches provided by the vendor promptly to mitigate the risk of file overwriting attacks.

Long-Term Security Practices

Maintaining up-to-date software versions and regularly applying security patches are essential for ensuring the protection of systems against known vulnerabilities and potential cyber threats.

Patching and Updates

Foxit Reader and PhantomPDF users are advised to regularly check for security updates and apply patches released by the vendor to address CVE-2021-38573 and other security vulnerabilities effectively.