CVE-2021-21053 : Security Advisory and Response

Adobe Illustrator version 25.1 (and earlier) is affected by an Out-of-bounds Write vulnerability when parsing a crafted file. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. This issue requires user interaction as the victim must open a malicious file.

Understanding CVE-2021-21053

This CVE involves an Out-of-bounds Write vulnerability in Adobe Illustrator leading to remote code execution.

What is CVE-2021-21053?

Adobe Illustrator version 25.1 and earlier versions are susceptible to an Out-of-bounds Write vulnerability, allowing attackers to execute arbitrary code on the victim's machine remotely.

The Impact of CVE-2021-21053

The impact of this vulnerability is considered high due to its potential for arbitrary code execution, which could result in compromised confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2021-21053

This section dives into the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from an Out-of-bounds Write issue in Adobe Illustrator, enabling attackers to write beyond the allocated memory leading to remote code execution.

Affected Systems and Versions

Adobe Illustrator versions up to 25.1 are impacted by this vulnerability, putting users at risk of remote code execution if exploited.

Exploitation Mechanism

Attackers can exploit this vulnerability by tricking a user into opening a malicious file, triggering the Out-of-bounds Write vulnerability and executing arbitrary code.

Mitigation and Prevention

Protecting systems against CVE-2021-21053 requires immediate action and long-term security practices.

Immediate Steps to Take

Users are advised to update Adobe Illustrator to the latest version to patch the vulnerability and avoid opening files from untrusted sources.

Long-Term Security Practices

Implementing security best practices like regular software updates, user awareness training, and network segmentation can help prevent similar vulnerabilities in the future.

Patching and Updates

Stay informed about security updates from Adobe, apply patches promptly, and follow secure file handling practices to mitigate the risk of remote code execution through this vulnerability.