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Uninitialized Memory Exposure Affecting cranelift-codegen package, versions <0.73.1

0.0
high

Snyk CVSS

    Attack Complexity High
    User Interaction Required
    Scope Changed
    Confidentiality High
    Integrity High

    Threat Intelligence

    EPSS 0.08% (34th percentile)
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NVD
8.8 high

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  • Snyk ID SNYK-RUST-CRANELIFTCODEGEN-1296552
  • published 25 May 2021
  • disclosed 25 May 2021
  • credit Unknown
Report a new vulnerability Found a mistake?

Introduced: 25 May 2021

CVE-2021-32629 Open this link in a new tab
CWE-201 Open this link in a new tab

How to fix?

Upgrade cranelift-codegen to version 0.73.1 or higher.

Overview

cranelift-codegen is a translates code from an intermediate representation into executable machine code.

Affected versions of this package are vulnerable to Uninitialized Memory Exposure. A bug in the x64 backend can create a scenario that could result in a potential sandbox escape in a WebAssembly module. This bug performs a sign-extend instead of a zero-extend on a value loaded from the stack, under a specific set of circumstances. If those circumstances occur, the bug could allow access to memory addresses up to 2GiB before the start of the heap allocated for the WebAssembly module.