CVE-2021-34838 : Security Advisory and Response

This article provides details about CVE-2021-34838, a vulnerability in Foxit PDF Reader 11.0.0.49893 that allows remote attackers to execute arbitrary code.

Understanding CVE-2021-34838

In this section, we will explore what CVE-2021-34838 is, its impact, technical details, and how to mitigate the risks associated with it.

What is CVE-2021-34838?

CVE-2021-34838 is a vulnerability in Foxit PDF Reader 11.0.0.49893 that enables remote attackers to execute arbitrary code. This security flaw arises from the mishandling of Annotation objects, allowing attackers to run code within the current process.

The Impact of CVE-2021-34838

The impact of this vulnerability is classified as high, with a CVSS base score of 7.8. Attack complexity is low, but user interaction is required. The confidentiality, integrity, and availability of affected systems are at risk.

Technical Details of CVE-2021-34838

Now let's delve into the technical details of CVE-2021-34838, including the vulnerability description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability in Foxit PDF Reader 11.0.0.49893 stems from the lack of validating the existence of an object before executing operations on it. This oversight allows attackers to exploit Annotation objects and execute malicious code.

Affected Systems and Versions

Foxit PDF Reader version 11.0.0.49893 is affected by this vulnerability. Users with this version are at risk of remote code execution by malicious actors.

Exploitation Mechanism

To exploit CVE-2021-34838, attackers need users to interact with a malicious page or open a malicious file. Once executed, the attacker can gain control over the target system.

Mitigation and Prevention

In this section, we will discuss the steps to mitigate the risks associated with CVE-2021-34838 and prevent potential exploitation.

Immediate Steps to Take

Users of Foxit PDF Reader 11.0.0.49893 should exercise caution when visiting unknown websites or opening files from untrusted sources. Consider updating to a patched version or using alternative PDF readers.

Long-Term Security Practices

Implementing strong cybersecurity practices, such as keeping software up to date, using security solutions, and educating users about safe browsing habits, can help prevent similar vulnerabilities in the future.

Patching and Updates

Foxit may release patches or updates to address CVE-2021-34838. Users should regularly check for updates from the official Foxit website to ensure their PDF Reader is secure.