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Vulnerability · Published Oct 20, 2023 · Assigned by GitHub_M

CVE-2023-45677Heap buffer out of bounds write in start_decoder in stb_vorbis

High 7.3

In plain English

A high-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 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.5%top 55.4% 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 `len` read in `start_decoder` is a negative number and `setup_malloc` successfully allocates memory in that case, but memory write is done with a negative index `len`. Similarly if len is INT_MAX the integer overflow len+1 happens in `f->vendor = (char*)setup_malloc(f, sizeof(char) * (len+1));` and `f->comment_list[i] = (char*)setup_malloc(f, sizeof(char) * (len+1));`. This issue may lead to code execution.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libstbno fix listedDEBIAN-CVE-2023-45677
Debian:13libstbno fix listedDEBIAN-CVE-2023-45677
Debian:14libstbno fix listedDEBIAN-CVE-2023-45677
Ubuntu:22.04:LTSlibstbno fix listedUBUNTU-CVE-2023-45677
Ubuntu:24.04:LTSlibstbno fix listedUBUNTU-CVE-2023-45677
Ubuntu:25.10libstbno fix listedUBUNTU-CVE-2023-45677
Ubuntu:26.04:LTSlibstbno fix listedUBUNTU-CVE-2023-45677
Ubuntu:26.10libstbno fix listedUBUNTU-CVE-2023-45677

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:L/I:L/A:L

References