// For flags

CVE-2023-45675

0 byte write heap buffer overflow in start_decoder in stb_vorbis

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

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.

stb_vorbis es una librería de archivo único con licencia MIT para procesar archivos ogg vorbis. Un archivo manipulado puede provocar una escritura fuera de límites en `f->vendor[len] = (char)'\0';`. La causa principal es que si el len leído en `start_decoder` es `-1` y `len + 1` se convierte en 0 cuando se pasa a `setup_malloc`. `setup_malloc` se comporta de manera diferente cuando `f->alloc.alloc_buffer` está preasignado. En lugar de devolver "NULL" como en el caso de "malloc", desplaza el búfer preasignado a cero y devuelve el bloque de memoria disponible actualmente. Este problema puede provocar la ejecución del código.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
Poc
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-10-10 CVE Reserved
  • 2023-10-20 CVE Published
  • 2023-11-04 EPSS Updated
  • 2024-09-12 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Nothings
Search vendor "Nothings"
 Stb Vorbis.c
Search vendor "Nothings" for product "Stb Vorbis.c"
 1.22
Search vendor "Nothings" for product "Stb Vorbis.c" and version "1.22"
-
Affected