Information Disclosure Vulnerability in SDL2_image Package
Summary
ALPINE-CVE-2018-3838: An exploitable information vulnerability exists in the XCF image rendering functionality of Simple DirectMedia Layer SDL2_image-2.0.2. Affects sdl2_image versions < 2.0.1-r2. Fixed in 2.0.1-r2. How to fix ↓
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Background
SDL2_image is an image loading library that is part of the Simple DirectMedia Layer (SDL) framework, which is widely used for developing multimedia applications and games. The library supports various image formats and provides developers with the ability to load images into their applications easily. However, certain versions of SDL2_image are vulnerable to an information disclosure issue when processing XCF image files, which can lead to unintended data exposure.
Vulnerability Detail
An exploitable information vulnerability exists in the XCF image rendering functionality of SDL2_image versions prior to 2.0.1-r2 for Alpine v3.5 and v3.6, and prior to 2.0.2-r1 for Alpine v3.7. A specially crafted XCF image can cause an out-of-bounds read on the heap, resulting in information disclosure. This vulnerability can be exploited by an attacker who displays a maliciously crafted image, potentially exposing sensitive information stored in memory.
How To Fix
Minimum fixed version
2.0.1-r2
This is the first release that contains the fix.
sudo apk add --upgrade sdl2_imageTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not feasible, consider avoiding the use of XCF images in your application until the package can be updated. Additionally, implement input validation to ensure that only trusted image sources are processed.
Conclusion
The SDL2_image package has a critical vulnerability that can lead to information disclosure through specially crafted XCF images. It is essential to update to the latest patched versions to mitigate this risk. Users should also consider using Vulert for real-time monitoring of vulnerabilities in their applications.
See every vulnerability recorded for sdl2_image →
FAQ
The CVSS score of this vulnerability is 6.5, indicating a medium severity level.
Versions prior to 2.0.1-r2 for Alpine v3.5 and v3.6, and prior to 2.0.2-r1 for Alpine v3.7 are affected.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. You can check your application using the Vulert playground without any signup.
Exploitation of this vulnerability may lead to information disclosure, allowing attackers to access sensitive data stored in memory.
Yes, you can avoid using XCF images and implement input validation to restrict image processing to trusted sources.
References
Related vulnerabilities
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