CVE-2020-5496 Explained : Impact and Mitigation

FontForge 20190801 has a heap-based buffer overflow vulnerability in the Type2NotDefSplines() function in splinesave.c.

Understanding CVE-2020-5496

FontForge software is susceptible to a heap-based buffer overflow issue, potentially leading to security breaches.

What is CVE-2020-5496?

The CVE-2020-5496 vulnerability involves a specific function within FontForge software that can be exploited to trigger a heap-based buffer overflow.

The Impact of CVE-2020-5496

This vulnerability could allow attackers to execute arbitrary code or cause a denial of service by crashing the application.

Technical Details of CVE-2020-5496

FontForge 20190801 is affected by a heap-based buffer overflow vulnerability in the Type2NotDefSplines() function in splinesave.c.

Vulnerability Description

The vulnerability arises due to improper handling of data in the Type2NotDefSplines() function, leading to a heap-based buffer overflow.

Affected Systems and Versions

Product: FontForge 20190801
Version: Not specified

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious font file and enticing a user to open it, triggering the buffer overflow.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2020-5496.

Immediate Steps to Take

Update FontForge software to the latest version to patch the vulnerability.
Avoid opening font files from untrusted or unknown sources.

Long-Term Security Practices

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

Patching and Updates

Ensure that all systems running FontForge are updated with the latest patches and security fixes to prevent exploitation of this vulnerability.