CVE-2017-2821 Explained : Impact and Mitigation

Lexmark Perspective Document Filters versions 11.3.0.2400 and 11.4.0.2452 contain a vulnerability in their PDF parsing feature that can lead to direct code execution.

Understanding CVE-2017-2821

Lexmark Perspective Document Filters versions 11.3.0.2400 and 11.4.0.2452 are affected by a use-after-free vulnerability in their PDF parsing functionality.

What is CVE-2017-2821?

This CVE refers to a vulnerability in Lexmark Perspective Document Filters versions 11.3.0.2400 and 11.4.0.2452 that allows an attacker to exploit the PDF parsing feature, potentially leading to the execution of arbitrary code.

The Impact of CVE-2017-2821

The vulnerability has a CVSS base score of 8.8, indicating a high severity level with significant impacts on confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2017-2821

Lexmark Perspective Document Filters versions 11.3.0.2400 and 11.4.0.2452 are susceptible to direct code execution due to the use-after-free issue in their PDF parsing feature.

Vulnerability Description

A crafted PDF document can trigger a use-after-free condition, potentially leading to direct code execution on the affected systems.

Affected Systems and Versions

Product: Perceptive Document Filters
Vendor: Lexmark
Versions: 11.3.0.2400 - x86, 11.4.0.2452 - x86

Exploitation Mechanism

By manipulating a PDF file in a specific manner, an attacker can exploit the vulnerability to execute arbitrary code.

Mitigation and Prevention

Immediate Steps to Take:

Apply security patches provided by Lexmark to address the vulnerability.
Avoid opening PDF files from untrusted or unknown sources. Long-Term Security Practices:
Regularly update software and firmware to the latest versions.
Implement network segmentation and access controls to limit the impact of potential attacks.
Conduct regular security assessments and penetration testing to identify and remediate vulnerabilities.
Educate users on safe browsing practices and the risks associated with opening files from unfamiliar sources.
Monitor security advisories and stay informed about emerging threats.

Patching and Updates

Ensure that all affected systems are updated with the latest patches and security fixes to mitigate the risk of exploitation.