CVE-2021-43790

Use After Free in lucet

Severity Score

8.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Lucet es un compilador y runtime nativo de WebAssembly. Se presenta un error en la rama principal de "lucet-runtime" que afecta a todas las versiones publicadas en crates.io y que permite un uso de memoria previamente liberada en un objeto Instance que podría resultar en corrupción de memoria, carrera de datos u otros problemas relacionados. Este bug fue introducido al principio del desarrollo de Lucet y está presente en todas las versiones. Como resultado de este error, y dependiendo del respaldo de memoria para los objetos de Instancia, es posible desencadenar un uso de memoria previamente liberada cuando la Instancia es abandonada. Los usuarios deben actualizar a la rama principal del repositorio de Lucet. Lucet ya no proporciona versiones en crates.io. No se presenta manera de remediar esta vulnerabilidad sin actualizar

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-16 CVE Reserved
2021-11-29 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-08-14 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-416: Use After Free

CAPEC

References (3)

URL	Tag	Source
https://crates.io/crates/lucet-runtime	Product

URL	Date	SRC
https://github.com/bytecodealliance/lucet/security/advisories/GHSA-hf79-8hjp-rrvq	2024-08-04

URL	Date	SRC
https://github.com/bytecodealliance/lucet/commit/7c7757c772fb709c61b1442bcc1e1fbee97bf4a8	2021-12-01

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Bytecodealliance Search vendor "Bytecodealliance"		Lucet Search vendor "Bytecodealliance" for product "Lucet"				<= 0.6.1 Search vendor "Bytecodealliance" for product "Lucet" and version " <= 0.6.1"		rust		Affected