Description

In Yarn before 1.21.1, the package install functionality can be abused to generate arbitrary symlinks on the host filesystem by using specially crafted "bin" keys. Existing files could be overwritten depending on the current user permission set.

Remediation

References

https://github.com/yarnpkg/yarn/issues/7761#issuecomment-565493023

https://github.com/yarnpkg/yarn/commit/039bafd74b7b1a88a53a54f8fa6fa872615e90e7

https://blog.daniel-ruf.de/critical-design-flaw-npm-pnpm-yarn/

https://access.redhat.com/errata/RHSA-2020:0475

https://snyk.io/vuln/SNYK-JS-YARN-537806%2C

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITY5BC63CCC647DFNUQRQ5AJDKUKUNBI/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HIZW4NZVV5QY5WWGW2JRP3FHYKZ6ZJ5/

Related Vulnerabilities

CVE-2019-14517 Vulnerability in maven package org.webjars.npm:editor.md

CVE-2020-7771 Vulnerability in npm package asciitable.js

CVE-2017-16189 Vulnerability in npm package sly07

CVE-2023-6886 Vulnerability in maven package com.xnx3.wangmarket:wangmarket

CVE-2021-23395 Vulnerability in npm package nedb

Severity

High

Classification

CWE-59 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Tags

Exploit Third Party Advisory Patch