CVE-2021-44701 Explained : Impact and Mitigation

Adobe Acrobat Reader DC version 21.007.20099 (and earlier), 20.004.30017 (and earlier), and 17.011.30204 (and earlier) are affected by a use-after-free vulnerability that could result in arbitrary code execution.

Understanding CVE-2021-44701

Adobe Acrobat Reader DC AcroForm Use-After-Free Remote Code Execution Vulnerability

What is CVE-2021-44701?

Acrobat Reader versions have a vulnerability in Format event actions leading to arbitrary code execution in the user's context.
Exploitation requires the victim to interact by opening a malicious file.

The Impact of CVE-2021-44701

CVSS Score: 7.8 (High severity)
Attack Vector: Local
User Interaction: Required
Confidentiality, Integrity, and Availability Impact: High

Technical Details of CVE-2021-44701

Adobe Acrobat Reader DC AcroForm Use-After-Free Remote Code Execution Vulnerability

Vulnerability Description

A use-after-free flaw in Format event actions could allow arbitrary code execution.

Affected Systems and Versions

Affected Products: Acrobat Reader
Vulnerable Versions:
<= 21.007.20099
<= 20.004.30017
<= 17.011.30204
<= None

Exploitation Mechanism

Malicious file opening by the user is necessary for exploitation.

Mitigation and Prevention

Protect your system from CVE-2021-44701

Immediate Steps to Take

Update Adobe Acrobat Reader to the latest version.
Exercise caution while opening files, especially from unknown sources.

Long-Term Security Practices

Regularly update software to patch vulnerabilities.
Implement user training on identifying malicious files.
Use trusted sources for file downloads.

Patching and Updates

Refer to Adobe's security advisory (https://helpx.adobe.com/security/products/acrobat/apsb22-01.html)