CVE-2022-31169 Cranelift vulnerable to miscompilation of constant values in division on AArch64
A miscompilation bug in Cranelift for AArch64 causes incorrect division results in WebAssembly guest programs, affecting runtime correctness.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-31169?
CVE-2022-31169 is a medium-severity vulnerability in bytecodealliance wasmtime, published on 21 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-682
Which versions are affected by CVE-2022-31169?
It affects 2 products.
Products include Bytecodealliance Cranelift-Codegen, Bytecodealliance Wasmtime.
How do I fix CVE-2022-31169?
Upgrade to a fixed version.
Is CVE-2022-31169 being exploited?
There is no known exploitation of CVE-2022-31169 in the wild and no public exploit code.
Other vulnerabilities in bytecodealliance wasmtime
- CVE-2023-26489 Guest-controlled out-of-bounds read/write on x86_64 in wasmtime
- CVE-2021-32629 Memory access due to code generation flaw in Cranelift module
- CVE-2022-31146 Use After Free in Wasmtime
- CVE-2022-31104 Miscompilation of `i8x16.swizzle` and `select` with v128 inputs in Wasmtime
- CVE-2023-27477 wasmtime vulnerable to miscompilation of `i8x16.select` with the same inputs on x86_64
Sources
Also known as UBUNTU-CVE-2022-31169.