CVE-2021-43790 Information

Description

Lucet is a native WebAssembly compiler and runtime. There is a bug in the main branch of lucet-runtime affecting all versions published to crates.io that allows a use-after-free in an Instance object that could result in memory corruption data race or other related issues. This bug was introduced early in the development of Lucet and is present in all releases. As a result of this bug and dependent on the memory backing for the Instance objects it is possible to trigger a use-after-free when the Instance is dropped. Users should upgrade to the main branch of the Lucet repository. Lucet no longer provides versioned releases on crates.io. There is no way to remediate this vulnerability without upgrading.

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/bytecodealliance/lucet/security/advisories/GHSA-hf79-8hjp-rrvq https://github.com/bytecodealliance/lucet/commit/7c7757c772fb709c61b1442bcc1e1fbee97bf4a8 https://crates.io/crates/lucet-runtime

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1