{ "document": { "aggregate_severity": { "text": "High" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_alt_nodejs/el6/vex/2021/cve-2021-39135-els_alt_nodejs-el6.json" } ], "tracking": { "current_release_date": "2026-09-08T12:38:27Z", "generator": { "date": "2026-09-08T12:38:27Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2021-39135-ELS_ALT_NODEJS-EL6", "initial_release_date": "2021-08-31T17:15:00Z", "revision_history": [ { "date": "2021-08-31T17:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-09-02T08:24:42Z", "number": "2", "summary": "Official Publication" }, { "date": "2026-09-03T10:55:52Z", "number": "3", "summary": "Update document" }, { "date": "2026-09-08T12:38:27Z", "number": "4", "summary": "Update document" } ], "status": "final", "version": "4" }, "title": "Security update on CVE-2021-39135" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Community Enterprise Operating System 6", "product": { "name": "Community Enterprise Operating System 6", "product_id": "CentOS-6", "product_identification_helper": { "cpe": "cpe:2.3:o:centos:centos:6:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Community Enterprise Operating System" } ], "category": "vendor", "name": "Cloud Linux Software, Inc." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "alt-nodejs14-nodejs-docs-0:14.21.3-32.el6.noarch", "product": { "name": "alt-nodejs14-nodejs-docs-0:14.21.3-32.el6.noarch", "product_id": "alt-nodejs14-nodejs-docs-0:14.21.3-32.el6.noarch", "product_identification_helper": { "purl": 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"product_reference": "alt-nodejs12-nodejs-devel-0:12.22.12-32.el6.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "alt-nodejs12-nodejs-devel-0:12.22.12-31.el6.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:alt-nodejs12-nodejs-devel-0:12.22.12-31.el6.x86_64" }, "product_reference": "alt-nodejs12-nodejs-devel-0:12.22.12-31.el6.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "alt-nodejs12-nodejs-docs-0:12.22.12-31.el6.noarch as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:alt-nodejs12-nodejs-docs-0:12.22.12-31.el6.noarch" }, "product_reference": "alt-nodejs12-nodejs-docs-0:12.22.12-31.el6.noarch", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "alt-nodejs12-nodejs-docs-0:12.22.12-32.el6.noarch as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:alt-nodejs12-nodejs-docs-0:12.22.12-32.el6.noarch" }, "product_reference": "alt-nodejs12-nodejs-docs-0:12.22.12-32.el6.noarch", "relates_to_product_reference": "CentOS-6" } ] }, "vulnerabilities": [ { "cve": "CVE-2021-39135", "cwe": { "id": "CWE-61", "name": "UNIX Symbolic Link (Symlink) Following" }, "notes": [ { "category": "description", "text": "`@npmcli/arborist`, the library that calculates dependency trees and manages the node_modules folder hierarchy for the npm command line interface, aims to guarantee that package dependency contracts will be met, and the extraction of package contents will always be performed into the expected folder. This is accomplished by extracting package contents into a project's `node_modules` folder. If the `node_modules` folder of the root project or any of its dependencies is somehow replaced with a symbolic link, it could allow Arborist to write package dependencies to any arbitrary location on the file system. Note that symbolic links contained within package artifact contents are filtered out, so another means of creating a `node_modules` symbolic link would have to be employed. 1. A `preinstall` script could replace `node_modules` with a symlink. (This is prevented by using `--ignore-scripts`.) 2. An attacker could supply the target with a git repository, instructing them to run `npm install --ignore-scripts` in the root. This may be successful, because `npm install --ignore-scripts` is typically not capable of making changes outside of the project directory, so it may be deemed safe. This is patched in @npmcli/arborist 2.8.2 which is included in npm v7.20.7 and above. For more information including workarounds please see the referenced GHSA-gmw6-94gg-2rc2.", "title": "Vulnerability description" }, { "category": "other", "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.", "title": "Statement" } ], "product_status": { "known_not_affected": [ "CentOS-6:alt-nodejs12-nodejs-0:12.22.12-29.el6.x86_64", "CentOS-6:alt-nodejs12-nodejs-0:12.22.12-31.el6.x86_64", "CentOS-6:alt-nodejs12-nodejs-0:12.22.12-32.el6.x86_64", "CentOS-6:alt-nodejs12-nodejs-devel-0:12.22.12-29.el6.x86_64", "CentOS-6:alt-nodejs12-nodejs-devel-0:12.22.12-31.el6.x86_64", "CentOS-6:alt-nodejs12-nodejs-devel-0:12.22.12-32.el6.x86_64", "CentOS-6:alt-nodejs12-nodejs-docs-0:12.22.12-29.el6.noarch", "CentOS-6:alt-nodejs12-nodejs-docs-0:12.22.12-31.el6.noarch", "CentOS-6:alt-nodejs12-nodejs-docs-0:12.22.12-32.el6.noarch", "CentOS-6:alt-nodejs12-npm-1:6.14.16-12.22.12.29.el6.x86_64", "CentOS-6:alt-nodejs12-npm-1:6.14.16-12.22.12.31.el6.x86_64", "CentOS-6:alt-nodejs12-npm-1:6.14.16-12.22.12.32.el6.x86_64", "CentOS-6:alt-nodejs14-nodejs-0:14.21.3-32.el6.x86_64", "CentOS-6:alt-nodejs14-nodejs-devel-0:14.21.3-32.el6.x86_64", "CentOS-6:alt-nodejs14-nodejs-docs-0:14.21.3-32.el6.noarch", "CentOS-6:alt-nodejs14-npm-1:6.14.18-14.21.3.32.el6.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els-alt-nodejs/cve/CVE-2021-39135" }, { "category": "external", "summary": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf", "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf" }, { "category": "external", "summary": "https://github.com/npm/arborist/security/advisories/GHSA-gmw6-94gg-2rc2", "url": "https://github.com/npm/arborist/security/advisories/GHSA-gmw6-94gg-2rc2" }, { "category": "external", "summary": "https://www.npmjs.com/package/%40npmcli/arborist", "url": "https://www.npmjs.com/package/%40npmcli/arborist" }, { "category": "external", "summary": "https://www.oracle.com/security-alerts/cpuoct2021.html", "url": "https://www.oracle.com/security-alerts/cpuoct2021.html" } ], "release_date": "2021-08-31T17:15:00Z", "threats": [ { "category": "impact", "details": "Important" }, { "category": "impact", "date": "2026-08-27T13:04:48.858975Z", "details": "important", "product_ids": [ "CentOS-6:alt-nodejs12-nodejs-0:12.22.12-29.el6.x86_64", "CentOS-6:alt-nodejs12-nodejs-0:12.22.12-31.el6.x86_64", "CentOS-6:alt-nodejs12-nodejs-0:12.22.12-32.el6.x86_64", "CentOS-6:alt-nodejs12-nodejs-devel-0:12.22.12-29.el6.x86_64", "CentOS-6:alt-nodejs12-nodejs-devel-0:12.22.12-31.el6.x86_64", "CentOS-6:alt-nodejs12-nodejs-devel-0:12.22.12-32.el6.x86_64", "CentOS-6:alt-nodejs12-nodejs-docs-0:12.22.12-29.el6.noarch", "CentOS-6:alt-nodejs12-nodejs-docs-0:12.22.12-31.el6.noarch", "CentOS-6:alt-nodejs12-nodejs-docs-0:12.22.12-32.el6.noarch", "CentOS-6:alt-nodejs12-npm-1:6.14.16-12.22.12.29.el6.x86_64", "CentOS-6:alt-nodejs12-npm-1:6.14.16-12.22.12.31.el6.x86_64", "CentOS-6:alt-nodejs12-npm-1:6.14.16-12.22.12.32.el6.x86_64", "CentOS-6:alt-nodejs14-nodejs-0:14.21.3-32.el6.x86_64", "CentOS-6:alt-nodejs14-nodejs-devel-0:14.21.3-32.el6.x86_64", "CentOS-6:alt-nodejs14-nodejs-docs-0:14.21.3-32.el6.noarch", "CentOS-6:alt-nodejs14-npm-1:6.14.18-14.21.3.32.el6.x86_64" ] } ] } ] }