Improper Array Index Validation in Tinyobjloader Package Leading to Potential Code Execution
Summary
DEBIAN-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 < 2.0.0~rc10+dfsg-2. Fixed in 2.0.0~rc10+dfsg-2. How to fix ↓
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Background
Tinyobjloader is a lightweight C++ library designed for loading and parsing Wavefront OBJ files. It is widely used in graphics applications for its simplicity and efficiency in handling 3D model data. However, versions prior to 2.0.0~rc10+dfsg-2 are vulnerable to an improper array index validation issue, which can be exploited through specially crafted OBJ files.
Vulnerability Detail
The vulnerability arises from the LoadObj functionality in tinyobjloader versions 2.0-rc1 and earlier development commit 79d4421. It allows an attacker to craft a malicious OBJ file that, when processed by the library, could lead to arbitrary code execution. This poses a significant risk as it can compromise the integrity of applications utilizing this library, potentially allowing unauthorized access or control over the system.
How To Fix
Minimum fixed version
2.0.0~rc10+dfsg-2
This is the first release that contains the fix.
sudo apt-get install --only-upgrade tinyobjloaderTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, avoid processing untrusted or unknown OBJ files until the package is updated. Implementing strict validation checks on the input files can also help mitigate the risk of exploitation.
Conclusion
The improper array index validation vulnerability in the tinyobjloader package poses a significant risk of code execution through malicious OBJ files. It is crucial to update to the patched version to safeguard applications and systems. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
See every vulnerability recorded for tinyobjloader →
FAQ
Tinyobjloader is a C++ library that facilitates the loading and parsing of Wavefront OBJ files, commonly used in 3D graphics applications.
The vulnerability involves improper array index validation, which can lead to code execution when processing specially crafted OBJ files.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If an immediate update is not possible, avoid using untrusted OBJ files and implement input validation to reduce the risk of exploitation.
More details can be found in the Debian CVE database at https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-28589.json.
References
Related vulnerabilities
Recent vulnerabilities recorded for tinyobjloader.
