CVE-2023-45667: Null pointer dereference because of an uninitialized variable in stb_image
First published: Fri Oct 20 2023(Updated: )
stb_image is a single file MIT licensed library for processing images. If `stbi__load_gif_main` in `stbi_load_gif_from_memory` fails it returns a null pointer and may keep the `z` variable uninitialized. In case the caller also sets the flip vertically flag, it continues and calls `stbi__vertical_flip_slices` with the null pointer result value and the uninitialized `z` value. This may result in a program crash.
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#L1442-L1454
- https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_image.h#L1448
- 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-2023-45667?
CVE-2023-45667 is a vulnerability in the stb_image library that allows a null pointer dereference due to an uninitialized variable.
What is the severity of CVE-2023-45667?
The severity of CVE-2023-45667 is high with a CVSS score of 7.5 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).
How does CVE-2023-45667 impact the stb_image library?
CVE-2023-45667 impacts the stb_image library by allowing a null pointer dereference, which can lead to a crash or potentially allow an attacker to execute arbitrary code.
What is the affected version of the stb_image library?
The affected version of the stb_image library is 2.28.
How can I fix CVE-2023-45667?
To fix CVE-2023-45667, it is recommended to update to a patched version of the stb_image library.
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