CVE-2023-21606 Explained : Impact and Mitigation

This CVE-2023-21606 involves an out-of-bounds write vulnerability in Adobe Acrobat Reader DC, potentially leading to remote code execution. It affects specific versions of Acrobat Reader and could allow an attacker to execute arbitrary code within the context of the current user.

Understanding CVE-2023-21606

Adobe Acrobat Reader DC Font Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability.

What is CVE-2023-21606?

The CVE-2023-21606 vulnerability is an out-of-bounds write issue in Adobe Acrobat Reader DC versions 22.003.20282 and earlier, 22.003.20281 and earlier, and 20.005.30418 and earlier. Exploiting this vulnerability requires user interaction, as the victim must open a malicious file.

The Impact of CVE-2023-21606

The impact of CVE-2023-21606 is significant, with a high base severity score of 7.8. If successfully exploited, an attacker could execute arbitrary code on the affected system, potentially leading to a compromise of confidentiality, integrity, and availability.

Technical Details of CVE-2023-21606

This section delves into the specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability in Adobe Acrobat Reader DC allows for an out-of-bounds write, which can be leveraged for remote code execution.

Affected Systems and Versions

Vendor: Adobe
Product: Acrobat Reader
Affected Versions:
Version "unspecified" with a version less than or equal to 20.005.30418
Version "unspecified" with a version less than or equal to 22.003.20282
Version "unspecified" with a version less than or equal to 22.003.20281

Exploitation Mechanism

The exploitation of CVE-2023-21606 requires user interaction, specifically opening a malicious file. Once the file is opened, an attacker could potentially execute arbitrary code on the target system.

Mitigation and Prevention

To safeguard systems from CVE-2023-21606, immediate action and long-term security measures are essential.

Immediate Steps to Take

Users are advised to update Adobe Acrobat Reader to the latest version available to mitigate the vulnerability. Additionally, exercise caution when opening files from untrusted or unknown sources.

Long-Term Security Practices

Implementing security best practices such as regular software updates, conducting security awareness training, and maintaining a robust cybersecurity posture can help prevent similar vulnerabilities in the future.

Patching and Updates

Adobe has likely released a security patch to address CVE-2023-21606. Ensure that all systems running Acrobat Reader are promptly updated to the latest version provided by Adobe to eliminate the risk associated with this vulnerability.