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CVE-2022-39394
Date: November 9, 2022
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.
Language: RUST
Severity Score
Related Resources (9)
Severity Score
Weakness Type (CWE)
Out-of-bounds Write
CWE-787CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | LOCAL |
| Attack Complexity (AC): | HIGH |
| Privileges Required (PR): | HIGH |
| User Interaction (UI): | REQUIRED |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | LOW |
| Integrity (I): | LOW |
| Availability (A): | LOW |