Vulnerability 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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bytecodealliance | Wasmtime | < 1.0.2 |
Related Weaknesses (CWE)
References
- https://github.com/bytecodealliance/wasmtime/commit/087d9d7becf7422b3f872a3bcd5dPatchThird Party Advisory
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-h84q-m8rr-Third Party Advisory
- https://github.com/bytecodealliance/wasmtime/commit/087d9d7becf7422b3f872a3bcd5dPatchThird Party Advisory
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-h84q-m8rr-Third Party Advisory
FAQ
What is CVE-2022-39394?
CVE-2022-39394 is a vulnerability with a CVSS score of 3.8 (LOW). 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...
How severe is CVE-2022-39394?
CVE-2022-39394 has been rated LOW with a CVSS base score of 3.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-39394?
Check the references section above for vendor advisories and patch information. Affected products include: Bytecodealliance Wasmtime.