CVE-2021-21056 Explained : Impact and Mitigation

Adobe FrameMaker version 2020.0.1 and earlier is affected by an Out-of-bounds Read vulnerability. An attacker could exploit this issue to achieve arbitrary code execution. Here is an overview of the CVE-2021-21056.

Understanding CVE-2021-21056

This section provides insights into the nature of the vulnerability and its impact.

What is CVE-2021-21056?

CVE-2021-21056 is an Out-of-bounds Read vulnerability in Adobe FrameMaker version 2020.0.1 and earlier. It occurs when parsing a specially crafted file, allowing an attacker to execute arbitrary code.

The Impact of CVE-2021-21056

The vulnerability has a CVSS base score of 7.8, indicating a high severity level. It requires user interaction, as the victim must open a malicious file, leading to potential remote code execution.

Technical Details of CVE-2021-21056

This section delves into the specifics of the vulnerability, including affected systems, exploitation mechanism, and more.

Vulnerability Description

The Out-of-bounds Read vulnerability in Adobe FrameMaker could be exploited by an unauthenticated attacker to achieve arbitrary code execution in the context of the current user. The exploitation requires the victim to interact with a malicious file.

Affected Systems and Versions

Adobe FrameMaker version 2020.0.1 (and earlier) is affected by CVE-2021-21056. This includes unspecified custom versions.

Exploitation Mechanism

To exploit this vulnerability, an attacker would need to craft a specially malicious file and entice the victim to open it, triggering the arbitrary code execution.

Mitigation and Prevention

This section outlines the steps to mitigate the risks posed by CVE-2021-21056 and prevent potential exploits.

Immediate Steps to Take

Users are advised to update Adobe FrameMaker to a non-vulnerable version promptly. Additionally, exercise caution when handling untrusted files.

Long-Term Security Practices

Implement security best practices such as regularly updating software and educating users about phishing emails and malicious files.

Patching and Updates

Stay informed about security patches released by Adobe for FrameMaker and apply them as soon as they are available to mitigate the risks associated with CVE-2021-21056.