CVE-2021-32629 – Memory access due to code generation flaw in Cranelift module

https://notcve.org/view.php?id=CVE-2021-32629

Cranelift is an open-source code generator maintained by Bytecode Alliance. It translates a target-independent intermediate representation into executable machine code. There is a bug in 0.73 of the Cranelift x64 backend that can create a scenario that could result in a potential sandbox escape in a Wasm program. This bug was introduced in the new backend on 2020-09-08 and first included in a release on 2020-09-30, but the new backend was not the default prior to 0.73. The recently-released version 0.73 with default settings, and prior versions with an explicit build flag to select the new backend, are vulnerable. • https://crates.io/crates/cranelift-codegen https://github.com/bytecodealliance/wasmtime/commit/95559c01aaa7c061088a433040f31e8291fb09d0 https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hpqh-2wqx-7qp5 https://www.fastly.com/security-advisories/memory-access-due-to-code-generation-flaw-in-cranelift-module • CWE-125: Out-of-bounds Read CWE-681: Incorrect Conversion between Numeric Types CWE-788: Access of Memory Location After End of Buffer •