CVE-2021-39844 : Exploit Details and Defense Strategies

Adobe Acrobat Reader DC versions 2021.005.20060 and earlier, 2020.004.30006 and earlier, and 2017.011.30199 and earlier are impacted by an out-of-bounds read vulnerability.

Understanding CVE-2021-39844

This CVE involves an out-of-bounds read vulnerability in Adobe Acrobat Reader, potentially leading to arbitrary memory information disclosure.

What is CVE-2021-39844?

Affected Product: Adobe Acrobat Reader
Vulnerability Type: Out-of-bounds Read (CWE-125)
CVSS Base Score: 3.3 (Low Severity)
Attack Vector: Local
User Interaction: Required

The Impact of CVE-2021-39844

This vulnerability could disclose arbitrary memory information when a victim interacts with a malicious file in the affected Acrobat Reader versions.

Technical Details of CVE-2021-39844

The following details provide a deeper understanding of the vulnerability.

Vulnerability Description

Out-of-bounds read vulnerability in Adobe Acrobat Reader
Vulnerability could lead to arbitrary memory disclosure

Affected Systems and Versions

Adobe Acrobat Reader DC versions 2021.005.20060 and earlier
Adobe Acrobat Reader 2020.004.30006 and earlier
Adobe Acrobat Reader 2017.011.30199 and earlier

Exploitation Mechanism

Exploitation requires user interaction
Victim must open a malicious file

Mitigation and Prevention

Steps to address and prevent potential exploits of CVE-2021-39844.

Immediate Steps to Take

Update Adobe Acrobat Reader to the latest version
Avoid opening files from untrusted sources

Long-Term Security Practices

Regularly update software and security patches
Implement strong file validation processes

Patching and Updates

Apply security patches provided by Adobe promptly