Vulnerability · Published Nov 29, 2021 · Assigned by GitHub_M
CVE-2021-43790Use After Free in lucet
High 8.5
In plain English
A high-severity use-after-free in lucet from bytecodealliance. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| bytecodealliance | lucet | <= 0.6.1 |
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/bytecodealliance/lucet/security/advisories/GHSA-hf79-8hjp-rrvq x_refsource_CONFIRM
- https://github.com/bytecodealliance/lucet/commit/7c7757c772fb709c61b1442bcc1e1fbee97bf4a8 x_refsource_MISC
- https://crates.io/crates/lucet-runtime x_refsource_MISC