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CVE-2021-43790— Use After Free in lucet

Quick assessment

Affected
bytecodealliance lucet
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Lucet是Bytecode Alliance组织的一个开源得、原生的 WebAssembly 编译器和运行时。用于在应用程序中安全地执行不受信任的 WebAssembly 程序。 Lucet 存在资源管理错误漏洞，该漏洞源于Lucet的Instance 对象中存在释放后使用。攻击者可利用该漏洞导致内存损坏、数据竞争或其他相关问题。

CVSS 8.5 · High EPSS 1.62% · P76

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth
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I. Basic Information for CVE-2021-43790

Vulnerability Information
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Vulnerability Title
Use After Free in lucet
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Lucet 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Lucet是Bytecode Alliance组织的一个开源得、原生的 WebAssembly 编译器和运行时。用于在应用程序中安全地执行不受信任的 WebAssembly 程序。 Lucet 存在资源管理错误漏洞，该漏洞源于Lucet的Instance 对象中存在释放后使用。攻击者可利用该漏洞导致内存损坏、数据竞争或其他相关问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
bytecodealliance lucet <= 0.6.1 -

II. Public POCs for CVE-2021-43790

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III. Intelligence Information for CVE-2021-43790

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Patches & Fixes for CVE-2021-43790 (1)

Vendor Advisories for CVE-2021-43790 (1)

Other References for CVE-2021-43790 (1)

IV. Related Vulnerabilities

Same vendor: bytecodealliance
Same weakness: CWE-416