CVE-2023-45666: Possible double-free or memory leak in stbi__load_gif_main in stb_image
First published: Fri Oct 20 2023(Updated: )
stb_image is a single file MIT licensed library for processing images. It may look like `stbi__load_gif_main` doesn’t give guarantees about the content of output value `*delays` upon failure. Although it sets `*delays` to zero at the beginning, it doesn’t do it in case the image is not recognized as GIF and a call to `stbi__load_gif_main_outofmem` only frees possibly allocated memory in `*delays` without resetting it to zero. Thus it would be fair to say the caller of `stbi__load_gif_main` is responsible to free the allocated memory in `*delays` only if `stbi__load_gif_main` returns a non null value. However at the same time the function may return null value, but fail to free the memory in `*delays` if internally `stbi__convert_format` is called and fails. Thus the issue may lead to a memory leak if the caller chooses to free `delays` only when `stbi__load_gif_main` didn’t fail or to a double-free if the `delays` is always freed
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#L6957
- https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_image.h#L6962-L7045
- 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-2023-45666?
CVE-2023-45666 is a vulnerability in the stb_image library that may result in a double-free or memory leak in the stbi__load_gif_main function.
What is the severity of CVE-2023-45666?
The severity of CVE-2023-45666 is critical with a CVSS score of 9.8.
How does CVE-2023-45666 impact Nothings Stb Image.h version 2.28?
CVE-2023-45666 affects Nothings Stb Image.h version 2.28, potentially leading to a double-free or memory leak in the stbi__load_gif_main function.
How can I fix CVE-2023-45666?
To fix CVE-2023-45666, it is recommended to update the stb_image library to a patched version provided by the vendor.
Is there any additional information available about CVE-2023-45666?
Yes, you can find more information about CVE-2023-45666 in the references provided, including the advisory and the affected lines of code.
- collector/nvd-index
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- agent/weakness
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- agent/references
- agent/author
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- vendor/nothings
- canonical/nothings stb image.h
- version/nothings stb image.h/2.28