// For flags

CVE-2022-39394

wasmtime_trap_code C API function has out of bounds write vulnerability

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Wasmtime is a standalone runtime for WebAssembly. Prior to version 2.0.2, there is a bug in Wasmtime's C API implementation where the definition of the `wasmtime_trap_code` does not match its declared signature in the `wasmtime/trap.h` header file. This discrepancy causes the function implementation to perform a 4-byte write into a 1-byte buffer provided by the caller. This can lead to three zero bytes being written beyond the 1-byte location provided by the caller. This bug has been patched and users should upgrade to Wasmtime 2.0.2. This bug can be worked around by providing a 4-byte buffer casted to a 1-byte buffer when calling `wasmtime_trap_code`. Users of the `wasmtime` crate are not affected by this issue, only users of the C API function `wasmtime_trap_code` are affected.

Wasmtime es un tiempo de ejecución independiente para WebAssembly. Antes de la versión 2.0.2, había un error en la implementación de la API C de Wasmtime donde la definición de `wasmtime_trap_code` no coincide con su firma declarada en el archivo de encabezado `wasmtime/trap.h`. Esta discrepancia hace que la implementación de la función realice una escritura de 4 bytes en un búfer de 1 byte proporcionado por la persona que llama. Esto puede provocar que se escriban tres bytes cero más allá de la ubicación de 1 byte proporcionada por la persona que llama. Este error ha sido corregido y los usuarios deben actualizar a Wasmtime 2.0.2. Este error se puede solucionar proporcionando un búfer de 4 bytes convertido a un búfer de 1 byte al llamar a `wasmtime_trap_code`. Los usuarios de la caja `wasmtime` no se ven afectados por este problema, solo los usuarios de la función API de C `wasmtime_trap_code` se ven afectados.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2022-09-02 CVE Reserved
  • 2022-11-10 CVE Published
  • 2024-06-02 EPSS Updated
  • 2024-08-03 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
Bytecodealliance
Search vendor "Bytecodealliance"
 Wasmtime
Search vendor "Bytecodealliance" for product "Wasmtime"
 < 1.0.2
Search vendor "Bytecodealliance" for product "Wasmtime" and version " < 1.0.2"
rust
Affected
Bytecodealliance
Search vendor "Bytecodealliance"
 Wasmtime
Search vendor "Bytecodealliance" for product "Wasmtime"
 >= 2.0.0 < 2.0.2
Search vendor "Bytecodealliance" for product "Wasmtime" and version " >= 2.0.0 < 2.0.2"
rust
Affected