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.