Critical Improper Array Index Validation in tinyobjloader - Potential Code Execution Risk
Summary
CVE-2020-28589: An improper array index validation vulnerability exists in the LoadObj functionality of tinyobjloader v2.0-rc1 and tinyobjloader development commit 79d4421. Affects tinyobjloader versions < 4464aa5b401f26330583fd995f7ba6df3592653a. No fix is published. How to fix ↓
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Background
tinyobjloader is a lightweight C++ library designed for loading 3D model files in various formats. It is widely used in graphics applications and game development due to its simplicity and efficiency. However, versions v2.0-rc1 and certain development commits are vulnerable to an improper array index validation issue, which can lead to severe security risks.
Vulnerability Detail
An improper array index validation vulnerability exists in the LoadObj functionality of tinyobjloader versions v2.0-rc1 and specific development commits. This flaw allows an attacker to craft a malicious file that, when processed by the library, could lead to arbitrary code execution. The vulnerability arises from insufficient checks on array indices, which can be exploited to manipulate memory and execute unauthorized code. The CVSS score for this vulnerability is 8.8, indicating a high severity level.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, avoid processing untrusted or unverified 3D model files with tinyobjloader until the library is updated. Additionally, implement input validation to ensure that only safe files are processed.
Conclusion
The improper array index validation vulnerability in tinyobjloader poses a significant risk of code execution through maliciously crafted files. Users are strongly advised to update to the latest version to mitigate this risk. For those unable to update immediately, implementing workarounds and using tools like Vulert can help manage exposure to this vulnerability.
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FAQ
The vulnerability is an improper array index validation issue that can lead to code execution when a malicious file is processed.
Versions v2.0-rc1 and certain development commits are affected by this vulnerability.
If exploited, this vulnerability could allow an attacker to execute arbitrary code on the affected system.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check your application without needing to sign up.
If an immediate update is not possible, avoid processing untrusted files and implement strict input validation as a temporary measure.
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