CVE-2022-39394

wasmtime_trap_code C API function has out of bounds write 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.

Category

3.8
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.04%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: bytecodealliance wasmtime
Published at:
Updated at:

References

Link Tags
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-h84q-m8rr-3v9q third party advisory
https://github.com/bytecodealliance/wasmtime/commit/087d9d7becf7422b3f872a3bcd5d97bb7ce7ff36 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2022-39394?
CVE-2022-39394 has been scored as a low severity vulnerability.
How to fix CVE-2022-39394?
To fix CVE-2022-39394, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-39394 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-39394 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-39394?
CVE-2022-39394 affects bytecodealliance wasmtime.
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