8.1 - CVE-2021-43790

Executive Summary

Informations
Name	CVE-2021-43790	First vendor Publication	2021-11-30
Vendor	Cve	Last vendor Modification	2021-12-01

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score	8.1
Base Score	8.1	Environmental Score	8.1
impact SubScore	5.9	Temporal Score	8.1
Exploitabality Sub Score	2.2

Attack Vector	Network	Attack Complexity	High
Privileges Required	None	User Interaction	None
Scope	Unchanged	Confidentiality Impact	High
Integrity Impact	High	Availability Impact	High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:P)
Cvss Base Score	6.8	Attack Range	Network
Cvss Impact Score	6.4	Attack Complexity	Medium
Cvss Expoit Score	8.6	Authentication	None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43790

CWE : Common Weakness Enumeration

%	Id	Name
100 %	CWE-416	Use After Free

Sources (Detail)

Source	Url
CONFIRM	https://github.com/bytecodealliance/lucet/security/advisories/GHSA-hf79-8hjp-...
MISC	https://crates.io/crates/lucet-runtime https://github.com/bytecodealliance/lucet/commit/7c7757c772fb709c61b1442bcc1e...