CVE-2017-11569 : Exploit Details and Defense Strategies

A heap-based buffer over-read vulnerability has been identified in FontForge 20161012 version, allowing attackers to execute code or cause denial of service (DoS) by exploiting a specially crafted otf file.

Understanding CVE-2017-11569

This CVE involves a vulnerability in the readttfcopyrights function in the parsettf.c file of FontForge 20161012 version.

What is CVE-2017-11569?

The vulnerability in FontForge 20161012 version allows for a heap-based buffer over-read, potentially leading to DoS or code execution when a malicious otf file is provided.

The Impact of CVE-2017-11569

Exploitation of this vulnerability can result in denial of service (DoS) attacks or potential execution of arbitrary code.

Technical Details of CVE-2017-11569

FontForge 20161012 version is susceptible to a heap-based buffer over-read vulnerability.

Vulnerability Description

The vulnerability exists in the readttfcopyrights function in the parsettf.c file, allowing attackers to exploit it using a specially crafted otf file.

Affected Systems and Versions

Product: FontForge 20161012
Version: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability by providing a maliciously crafted otf file, triggering the heap-based buffer over-read.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2017-11569.

Immediate Steps to Take

Update FontForge to the latest version to patch the vulnerability.
Avoid opening or processing untrusted otf files.
Implement file type and content validation mechanisms.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Conduct security assessments and audits to identify and mitigate vulnerabilities.

Patching and Updates

Ensure that FontForge is regularly updated to the latest version to mitigate the CVE-2017-11569 vulnerability.