Log in Start free

Vulnerability · Published Oct 20, 2023 · Assigned by GitHub_M

CVE-2023-45666Possible double-free or memory leak in stbi__load_gif_main in stb_image

High 7.3

In plain English

A high-severity double free in stb from nothings. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.3High
Exploit odds (30 days)1.1%top 35.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20stb0_git20231012-r0ALPINE-CVE-2023-45666
Alpine:v3.21stb0_git20231012-r0ALPINE-CVE-2023-45666
Alpine:v3.22stb0_git20231012-r0ALPINE-CVE-2023-45666
Alpine:v3.23stb0_git20231012-r0ALPINE-CVE-2023-45666
Alpine:v3.24stb0_git20231012-r0ALPINE-CVE-2023-45666
Debian:12libstbno fix listedDEBIAN-CVE-2023-45666
Debian:13libstbno fix listedDEBIAN-CVE-2023-45666
Debian:14libstbno fix listedDEBIAN-CVE-2023-45666
Ubuntu:22.04:LTSlibstbno fix listedUBUNTU-CVE-2023-45666
Ubuntu:24.04:LTSlibstbno fix listedUBUNTU-CVE-2023-45666
Ubuntu:25.10libstbno fix listedUBUNTU-CVE-2023-45666
Ubuntu:26.04:LTSlibstbno fix listedUBUNTU-CVE-2023-45666
Ubuntu:26.10libstbno fix listedUBUNTU-CVE-2023-45666

Affected products (as reported)

VendorProductVersions
nothings stb <= 2.28

Weakness: CWE-415 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References