CVE-2021-35983 : Security Advisory and Response

Adobe Acrobat Reader DC versions 2021.005.20054 (and earlier), 2020.004.30005 (and earlier), and 2017.011.30197 (and earlier) are affected by an Use-after-free vulnerability that can lead to remote code execution. This article provides detailed insights into CVE-2021-35983.

Understanding CVE-2021-35983

This section will cover the impact of CVE-2021-35983 and its technical details.

What is CVE-2021-35983?

CVE-2021-35983 is a Use-after-free vulnerability in Adobe Acrobat Reader DC, allowing an attacker to execute arbitrary code in the context of the current user. The exploit requires user interaction to open a malicious file.

The Impact of CVE-2021-35983

The vulnerability has a CVSS base score of 7.8 (High), affecting confidentiality, integrity, and availability. It requires low attack complexity and user interaction, with no privileges required.

Technical Details of CVE-2021-35983

Let's delve deeper into the vulnerability's description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in Acrobat Reader DC could result in arbitrary code execution, triggered by an attacker through a crafted file. Successful exploitation could lead to a complete compromise of the user's system.

Affected Systems and Versions

Adobe Acrobat Reader DC versions 2021.005.20054, 2020.004.30005, and 2017.011.30197 (and earlier) are confirmed to be impacted by this vulnerability.

Exploitation Mechanism

To exploit CVE-2021-35983, an unauthenticated attacker would entice a victim to open a specially crafted file, enabling the execution of arbitrary code within the user's context.

Mitigation and Prevention

This section covers the necessary steps to mitigate the risk posed by CVE-2021-35983.

Immediate Steps to Take

Users are advised to update Adobe Acrobat Reader DC to the latest version available, promptly apply security patches, and refrain from opening files from untrusted or unknown sources.

Long-Term Security Practices

Implementing robust security practices like regular software updates, employing strong email and web filters, and providing security awareness training can help prevent similar vulnerabilities.

Patching and Updates

Adobe has released patches to address CVE-2021-35983. Ensure that your Adobe Acrobat Reader DC is updated with the latest security fixes to eliminate the risk of exploitation.