CVE-2021-39821 Explained : Impact and Mitigation

Adobe InDesign versions 16.3 and 16.3.1 are affected by an out-of-bounds read vulnerability, potentially leading to arbitrary code execution.

Understanding CVE-2021-39821

Adobe InDesign TIF File Parsing Out-Of-Bounds Read Remote Code Execution Vulnerability

What is CVE-2021-39821?

Adobe InDesign versions 16.3 and 16.3.1 are susceptible to an out-of-bounds read vulnerability.
The vulnerability could allow an attacker to execute arbitrary code in the context of the current user.
Exploitation requires user interaction by opening a malicious TIF file.

The Impact of CVE-2021-39821

CVSS Score: 7.8 (High)
Severity: High
Attack Vector: Local
Attack Complexity: Low
User Interaction: Required
Impact: High impact on confidentiality, integrity, and availability of the system.

Technical Details of CVE-2021-39821

Adobe InDesign TIF File Parsing Out-Of-Bounds Read Remote Code Execution Vulnerability

Vulnerability Description

The vulnerability in Adobe InDesign allows for out-of-bounds read operations.
This could lead to potential arbitrary code execution.

Affected Systems and Versions

Affected Versions:
InDesign <= 16.3
InDesign <= 16.3.2

Exploitation Mechanism

The vulnerability requires a victim to open a malicious TIF file to exploit the out-of-bounds read issue.

Mitigation and Prevention

Immediate Steps to Take:

Update Adobe InDesign to the latest version.
Be cautious while opening TIF files from untrusted sources.

Long-Term Security Practices:

Regularly update software and apply security patches.

Patching and Updates:

Adobe has released security updates to address the vulnerability. Stay updated with the latest patches.