Arbitrary Code Execution Affecting wasmtime package, versions <0.85.2

  • Attack Complexity


  • Integrity


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  • snyk-id


  • published

    22 Jul 2022

  • disclosed

    22 Jul 2022

  • credit


How to fix?

Upgrade wasmtime to version 0.85.2 or higher.


Affected versions of this package are vulnerable to Arbitrary Code Execution. 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.