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CVE-2021-21797 : Vulnerability Insights and Analysis

Explore the impact, technical details, affected systems, and mitigation strategies for CVE-2021-21797, a critical double-free vulnerability in Nitro Pro PDF software.

A detailed overview of CVE-2021-21797 exposing a double-free vulnerability in Nitro Pro PDF software.

Understanding CVE-2021-21797

This section delves into the impact and technical details of the CVE-2021-21797 vulnerability.

What is CVE-2021-21797?

CVE-2021-21797 is a double-free vulnerability present in Nitro Pro PDF's JavaScript implementation. Maliciously crafted documents can exploit this flaw to execute code.

The Impact of CVE-2021-21797

With a CVSS base score of 8.8, the vulnerability poses a high risk, potentially allowing attackers to execute arbitrary code on the affected system.

Technical Details of CVE-2021-21797

Explore the intricate details of the vulnerability in this section.

Vulnerability Description

The flaw occurs when storing a reference to a timeout object in two different places, leading to the release of the reference twice upon closing a document.

Affected Systems and Versions

Nitro Pro versions 13.31.0.605 and 13.33.2.645 are impacted by this vulnerability.

Exploitation Mechanism

An attacker can exploit CVE-2021-21797 by persuading a user to open a specially crafted document, triggering the double-free vulnerability.

Mitigation and Prevention

Discover the necessary steps to mitigate and prevent exploits leveraging CVE-2021-21797.

Immediate Steps to Take

Users should refrain from opening untrusted PDF files or documents from unknown sources to mitigate the risk of exploitation.

Long-Term Security Practices

Implementing regular software updates and security patches is crucial to safeguard systems against known vulnerabilities like CVE-2021-21797.

Patching and Updates

Nitro Pro users are advised to update their software to the latest version to patch the CVE-2021-21797 vulnerability.

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