CVE-2021-43016 Explained : Impact and Mitigation

Adobe InCopy version 16.4 and earlier is impacted by a Null pointer dereference vulnerability leading to an application denial-of-service.

Understanding CVE-2021-43016

Adobe InCopy NULL Pointer Dereference Application Denial of Service

What is CVE-2021-43016?

Adobe InCopy versions up to 16.4 are vulnerable to a Null pointer dereference flaw when processing a malicious file, allowing an unauthenticated attacker to cause a denial-of-service by exploiting user interaction.

The Impact of CVE-2021-43016

CVSS Base Score: 5.5 (Medium Severity)
Attack Vector: Local
Availability Impact: High

This vulnerability could be exploited by a threat actor to disrupt InCopy functionality, affecting the user's ability to work with the application.

Technical Details of CVE-2021-43016

Details of the vulnerability in Adobe InCopy

Vulnerability Description

The vulnerability results from a Null pointer dereference issue when handling specifically crafted files, potentially leading to denial-of-service attacks.

Affected Systems and Versions

Affected Product: InCopy
Vendor: Adobe
Versions Affected: up to 16.4

Exploitation Mechanism

Exploiting this vulnerability necessitates a user to open a crafted file, triggering the application denial-of-service with no further user interaction required.

Mitigation and Prevention

Protecting systems from CVE-2021-43016

Immediate Steps to Take

Update Adobe InCopy to version 16.5 or later to mitigate the vulnerability.
Be cautious when opening files from untrusted sources to prevent exploitation.

Long-Term Security Practices

Regularly update software to patch known vulnerabilities promptly.
Educate users on identifying and avoiding potentially harmful files to enhance overall system security.

Patching and Updates

Ensure timely application of software patches and security updates to prevent exploitation of known vulnerabilities.