CVE-2019-14811 Explained : Impact and Mitigation

A vulnerability in ghostscript versions prior to 9.28 allowed attackers to bypass security restrictions, potentially leading to unauthorized access and arbitrary command execution.

Understanding CVE-2019-14811

Before version 9.50, ghostscript had a vulnerability in its .pdf_hook_DSC_Creator procedure, enabling attackers to disable security measures and execute arbitrary commands.

What is CVE-2019-14811?

Vulnerability in ghostscript versions prior to 9.28
Scripts could bypass

-dSAFER

restrictions
Attackers could gain access to the file system or execute arbitrary commands

The Impact of CVE-2019-14811

CVSS Base Score: 7.3 (High)
Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
Confidentiality, Integrity, and Availability Impact: Low

Technical Details of CVE-2019-14811

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Flaw in .pdf_hook_DSC_Creator procedure
Allowed scripts to bypass security restrictions
Could lead to unauthorized access and command execution

Affected Systems and Versions

Product: ghostscript
Vendor: Artifex Software
Versions Affected: ghostscript versions prior to 9.28

Exploitation Mechanism

Attackers could provide a tailored PostScript file
Disable security measures
Gain access to the file system or execute arbitrary commands

Mitigation and Prevention

Protecting systems from CVE-2019-14811 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update ghostscript to version 9.50 or later
Monitor for any suspicious activities on the system

Long-Term Security Practices

Regularly update software and apply security patches
Implement least privilege access controls
Conduct security audits and assessments periodically

Patching and Updates

Apply security updates provided by the vendor
Stay informed about security advisories and best practices