CVE-2017-11573 : Security Advisory and Response

FontForge 20161012 version contains a buffer over-read vulnerability in the ValidatePostScriptFontName function, allowing for a denial of service (DoS) or arbitrary code execution through a maliciously crafted otf file.

Understanding CVE-2017-11573

This CVE identifies a security flaw in FontForge 20161012 that can be exploited by attackers to trigger a DoS condition or execute unauthorized code.

What is CVE-2017-11573?

The vulnerability in FontForge 20161012 version allows threat actors to exploit a buffer over-read issue in the ValidatePostScriptFontName function, present in the parsettf.c file. By leveraging a specially crafted otf file, attackers can disrupt services or run arbitrary code on the target system.

The Impact of CVE-2017-11573

The exploitation of this vulnerability can lead to a DoS condition or enable attackers to execute arbitrary code on the affected system, potentially compromising its integrity and confidentiality.

Technical Details of CVE-2017-11573

FontForge 20161012 version is susceptible to a buffer over-read vulnerability in the ValidatePostScriptFontName function, which can have severe consequences if exploited.

Vulnerability Description

The flaw in FontForge 20161012 version resides in the ValidatePostScriptFontName function within the parsettf.c file, allowing threat actors to manipulate otf files to trigger a DoS state or execute unauthorized code.

Affected Systems and Versions

Affected Version: FontForge 20161012
Product: Not applicable
Vendor: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious otf files to trigger the buffer over-read issue in the ValidatePostScriptFontName function, leading to a DoS scenario or unauthorized code execution.

Mitigation and Prevention

To address CVE-2017-11573 and enhance system security, users and organizations should take immediate and long-term preventive measures.

Immediate Steps to Take

Apply security patches or updates provided by FontForge promptly.
Avoid opening or downloading suspicious otf files from untrusted sources.
Implement network segmentation and access controls to limit the impact of potential attacks.

Long-Term Security Practices

Conduct regular security assessments and vulnerability scans on systems hosting FontForge.
Educate users on safe file handling practices and the risks associated with opening files from unknown sources.
Stay informed about security advisories and updates from FontForge to proactively address emerging threats.

Patching and Updates

Regularly check for security patches and updates released by FontForge to address vulnerabilities and enhance the overall security posture of systems.