CVE-2022-39394
wasmtime_trap_code C API function has out of bounds write vulnerability
- State
- Published
- Severity
- 3.8 Low
- Published
- Nov 10, 2022
- Updated
- Apr 23, 2025
- Reserved
- Sep 2, 2022
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.8 Low | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L | GitHub_M |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
wasmtimebytecodealliance |
|
References
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