Vulnerability Description
Wasmtime is a standalone runtime for WebAssembly. There is a bug in Wasmtime's code generator, Cranelift, for AArch64 targets where constant divisors can result in incorrect division results at runtime. This affects Wasmtime prior to version 0.38.2 and Cranelift prior to 0.85.2. This issue only affects the AArch64 platform. Other platforms are not affected. The translation rules for constants did not take into account whether sign or zero-extension should happen which resulted in an incorrect value being placed into a register when a division was encountered. The impact of this bug is that programs executing within the WebAssembly sandbox would not behave according to the WebAssembly specification. This means that it is hypothetically possible for execution within the sandbox to go awry and WebAssembly programs could produce unexpected results. This should not impact hosts executing WebAssembly but does affect the correctness of guest programs. This bug has been patched in Wasmtime version 0.38.2 and cranelift-codegen 0.85.2. There are no known workarounds.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bytecodealliance | Cranelift-Codegen | < 0.85.1 |
| Bytecodealliance | Wasmtime | < 0.38.1 |
Related Weaknesses (CWE)
References
- https://github.com/bytecodealliance/wasmtime/commit/2ba4bce5cc719e5a74e571a53442PatchThird Party Advisory
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-7f6x-jwh5-Third Party Advisory
- https://github.com/bytecodealliance/wasmtime/commit/2ba4bce5cc719e5a74e571a53442PatchThird Party Advisory
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-7f6x-jwh5-Third Party Advisory
FAQ
What is CVE-2022-31169?
CVE-2022-31169 is a vulnerability with a CVSS score of 5.9 (MEDIUM). Wasmtime is a standalone runtime for WebAssembly. There is a bug in Wasmtime's code generator, Cranelift, for AArch64 targets where constant divisors can result in incorrect division results at runtim...
How severe is CVE-2022-31169?
CVE-2022-31169 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-31169?
Check the references section above for vendor advisories and patch information. Affected products include: Bytecodealliance Cranelift-Codegen, Bytecodealliance Wasmtime.