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Vulnerability · Published Oct 20, 2023 · Assigned by GitHub_M

CVE-2023-45667Null pointer dereference because of an uninitialized variable in stb_image

Medium 5.3

In plain English

A medium-severity null pointer dereference in stb from nothings. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)1.3%top 30.1% 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. 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20stb0_git20231012-r0ALPINE-CVE-2023-45667
Alpine:v3.21stb0_git20231012-r0ALPINE-CVE-2023-45667
Alpine:v3.22stb0_git20231012-r0ALPINE-CVE-2023-45667
Alpine:v3.23stb0_git20231012-r0ALPINE-CVE-2023-45667
Alpine:v3.24stb0_git20231012-r0ALPINE-CVE-2023-45667
Debian:12libstbno fix listedDEBIAN-CVE-2023-45667
Debian:13libstbno fix listedDEBIAN-CVE-2023-45667
Debian:14libstbno fix listedDEBIAN-CVE-2023-45667
Ubuntu:22.04:LTSlibstbno fix listedUBUNTU-CVE-2023-45667
Ubuntu:24.04:LTSlibstbno fix listedUBUNTU-CVE-2023-45667
Ubuntu:25.10libstbno fix listedUBUNTU-CVE-2023-45667
Ubuntu:26.04:LTSlibstbno fix listedUBUNTU-CVE-2023-45667
Ubuntu:26.10libstbno fix listedUBUNTU-CVE-2023-45667

Affected products (as reported)

VendorProductVersions
nothings stb <= 2.28

Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References