CVE-2023-45664: Double-free in stbi__load_gif_main_outofmem in stb_image
First published: Fri Oct 20 2023(Updated: )
stb_image is a single file MIT licensed library for processing images. A crafted image file can trigger `stbi__load_gif_main_outofmem` attempt to double-free the out variable. This happens in `stbi__load_gif_main` because when the `layers * stride` value is zero the behavior is implementation defined, but common that realloc frees the old memory and returns null pointer. Since it attempts to double-free the memory a few lines below the first “free”, the issue can be potentially exploited only in a multi-threaded environment. In the worst case this may lead to code execution.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Nothings Stb Image.h | =2.28 |
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Reference Links
- https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_image.h#L6993-L6995
- https://securitylab.github.com/advisories/GHSL-2023-145_GHSL-2023-151_stb_image_h/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NMXKOKPP4BKTNUTF5KSRDQAWOUILQZNO/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QVABVF4GEM6BYD5L4L64RCRSXUHY6LGN/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UVQ7ONFH5GWLMXYEAJG32A3EUKUCEVCR/
Frequently Asked Questions
What is CVE-2023-45664?
CVE-2023-45664 is a vulnerability in the stb_image library that can be triggered by a crafted image file, resulting in an attempt to double-free the out variable.
How severe is CVE-2023-45664?
CVE-2023-45664 has a severity score of 8.8, which is considered high.
What software is affected by CVE-2023-45664?
The affected software is Nothings Stb Image.h version 2.28.
How can I fix CVE-2023-45664?
To fix CVE-2023-45664, update to a version of the stb_image library that is not affected by the vulnerability.
Where can I find more information about CVE-2023-45664?
More information about CVE-2023-45664 can be found in the GitHub Security Lab advisory and the stb_image library's GitHub repository.
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