CVE-2020-13493 : Security Advisory and Response

A heap overflow vulnerability exists in Pixar OpenUSD 20.05 when parsing compressed sections in binary USD files, allowing an attacker to execute arbitrary code by tricking a user into opening a malicious file.

Understanding CVE-2020-13493

This CVE involves a heap overflow vulnerability in Pixar OpenUSD 20.05, impacting systems running Apple macOS Catalina 10.15.3.

What is CVE-2020-13493?

The vulnerability arises when the software processes compressed sections in binary USD files, leading to a heap overflow when handling specially crafted USDC file format paths.

The Impact of CVE-2020-13493

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

Technical Details of CVE-2020-13493

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows an attacker to trigger a heap overflow by exploiting the way path jumps are processed in compressed sections of binary USD files.

Affected Systems and Versions

Pixar OpenUSD 20.05
Apple macOS Catalina 10.15.3

Exploitation Mechanism

To exploit this vulnerability, an attacker needs to craft a malicious USDC file and trick the victim into opening it, triggering the heap overflow.

Mitigation and Prevention

Protecting systems from CVE-2020-13493 requires immediate actions and long-term security practices.

Immediate Steps to Take

Avoid opening files from untrusted or unknown sources.
Apply security updates and patches promptly.

Long-Term Security Practices

Implement file type validation mechanisms.
Conduct regular security training for users on file handling best practices.

Patching and Updates

Ensure that the affected software, Pixar OpenUSD, is updated to a secure version to mitigate the vulnerability.