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Vulnerability · Published Oct 20, 2023 · Assigned by GitHub_M

CVE-2023-456750 byte write heap buffer overflow in start_decoder in stb_vorbis

Medium 6.5

In plain English

A medium-severity out-of-bounds write in stb from nothings. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.7%top 45.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger out of bounds write in `f->vendor[len] = (char)'\0';`. The root cause is that if the len read in `start_decoder` is `-1` and `len + 1` becomes 0 when passed to `setup_malloc`. The `setup_malloc` behaves differently when `f->alloc.alloc_buffer` is pre-allocated. Instead of returning `NULL` as in `malloc` case it shifts the pre-allocated buffer by zero and returns the currently available memory block. This issue may lead to code execution.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20stb0_git20231012-r0ALPINE-CVE-2023-45675
Alpine:v3.21stb0_git20231012-r0ALPINE-CVE-2023-45675
Alpine:v3.22stb0_git20231012-r0ALPINE-CVE-2023-45675
Alpine:v3.23stb0_git20231012-r0ALPINE-CVE-2023-45675
Alpine:v3.24stb0_git20231012-r0ALPINE-CVE-2023-45675
Debian:12libstbno fix listedDEBIAN-CVE-2023-45675
Debian:13libstbno fix listedDEBIAN-CVE-2023-45675
Debian:14libstbno fix listedDEBIAN-CVE-2023-45675
Ubuntu:22.04:LTSlibstbno fix listedUBUNTU-CVE-2023-45675
Ubuntu:24.04:LTSlibstbno fix listedUBUNTU-CVE-2023-45675
Ubuntu:25.10libstbno fix listedUBUNTU-CVE-2023-45675
Ubuntu:26.04:LTSlibstbno fix listedUBUNTU-CVE-2023-45675
Ubuntu:26.10libstbno fix listedUBUNTU-CVE-2023-45675

Affected products (as reported)

VendorProductVersions
nothings stb <= 1.22

Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

References