CVE-2021-26605 : What You Need to Know
Learn about CVE-2021-26605, an improper input validation vulnerability in unidocs ezPDFReader allowing execution of arbitrary commands. Understand the impact, affected systems, and mitigation steps.
An improper input validation vulnerability in unidocs's ezPDFReader allows attackers to execute arbitrary commands when the ezPDF launcher processes crafted input values through JSON-RPC communication.
Understanding CVE-2021-26605
This vulnerability in ezPDFReader could be exploited by malicious actors to run arbitrary commands on the affected Windows machines.
What is CVE-2021-26605?
An improper input validation flaw in ezPDFReader permits threat actors to execute arbitrary commands by providing manipulated input values through JSON-RPC communication.
The Impact of CVE-2021-26605
With a CVSS base score of 7.5, this vulnerability poses a high risk, allowing attackers to achieve code execution on Windows systems running affected versions of ezPDFReader.
Technical Details of CVE-2021-26605
The details of the vulnerability include:
Vulnerability Description
The vulnerability arises due to improper input validation in the ezPDFReader service, enabling attackers to send malicious inputs leading to arbitrary command execution.
Affected Systems and Versions
- Affected Platforms: Windows
- Affected Product: ezPDFReader
- Affected Versions: 2.0 to 3.0
Exploitation Mechanism
The flaw can be exploited when the ezPDF launcher encounters and processes crafted input values received through JSON-RPC communication.
Mitigation and Prevention
To protect systems from CVE-2021-26605:
Immediate Steps to Take
- Disable ezPDFReader if not essential.
- Implement network segmentation to restrict communication channels.
Long-Term Security Practices
- Regularly update ezPDFReader to the latest version.
- Monitor network traffic for any malicious activity.
Patching and Updates
Ensure timely patching of ezPDFReader to the most recent version to mitigate the risk of arbitrary command execution.