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Alpine Linux: CVE-2023-45666: Double Free

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Alpine Linux: CVE-2023-45666: Double Free

Severity
10
CVSS
(AV:N/AC:L/Au:N/C:C/I:C/A:C)
Published
10/20/2023
Created
08/23/2024
Added
08/22/2024
Modified
10/02/2024

Description

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

Solution(s)

  • alpine-linux-upgrade-stb

References

  • https://attackerkb.com/topics/cve-2023-45666
  • CVE - 2023-45666
  • https://security.alpinelinux.org/vuln/CVE-2023-45666
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