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CVE-2021-21099 : Exploit Details and Defense Strategies

Adobe InDesign version 16.0 and earlier face a critical Out-of-bounds Write vulnerability allowing remote code execution. Learn the impact, mitigation steps, and prevention measures.

Adobe InDesign version 16.0 and earlier are impacted by an Out-of-bounds Write vulnerability during file parsing, potentially leading to remote code execution.

Understanding CVE-2021-21099

This CVE details a critical vulnerability in Adobe InDesign versions 16.0 and prior, allowing unauthenticated attackers to execute remote code by exploiting a specific file parsing issue.

What is CVE-2021-21099?

Adobe InDesign versions 16.0 and earlier contain a critical Out-of-bounds Write vulnerability. Successful exploitation could enable a remote attacker to execute arbitrary code on the victim's system.

The Impact of CVE-2021-21099

The vulnerability poses a high risk, with a CVSS base score of 8.8. Attackers can achieve remote code execution with high impact on confidentiality, integrity, and availability, requiring user interaction through opening a malicious file.

Technical Details of CVE-2021-21099

This section provides a deeper insight into the vulnerability affecting Adobe InDesign versions 16.0 and earlier.

Vulnerability Description

The vulnerability is an Out-of-bounds Write issue that arises during the parsing of a manipulated file. Exploiting this flaw could result in unauthorized remote code execution.

Affected Systems and Versions

Adobe InDesign versions 16.0 and prior are impacted by this CVE. The vulnerability affects users who interact with crafted files.

Exploitation Mechanism

To exploit CVE-2021-21099, an attacker must entice a user to open a specifically crafted file using Adobe InDesign, enabling the execution of malicious code in the context of the current user.

Mitigation and Prevention

Protect your systems from CVE-2021-21099 by following these security measures.

Immediate Steps to Take

Users should refrain from opening untrusted or suspicious InDesign files, especially from unknown or unverified sources. Implement network-level protections to detect and block malicious files.

Long-Term Security Practices

Ensure regular software updates and security patches are applied to Adobe InDesign to mitigate known vulnerabilities. Educate users about safe file handling practices and potential risks associated with opening unfamiliar files.

Patching and Updates

Keep Adobe InDesign software up to date with the latest security patches and updates to address CVE-2021-21099 and other potential security flaws.

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