Yarn
At a glance
- Source
- NVD
- EPSS
- EPSS 1.52 % · percentile 74 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- snyk
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-59 — Improper Link Resolution Before File Access
References
- https://snyk.io/vuln/SNYK-JS-YARN-537806%2C
- https://github.com/yarnpkg/yarn/commit/039bafd74b7b1a88a53a54f8fa6fa872615e90e7
- https://github.com/yarnpkg/yarn/issues/7761#issuecomment-565493023
- https://blog.daniel-ruf.de/critical-design-flaw-npm-pnpm-yarn/
- 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/
- https://access.redhat.com/errata/RHSA-2020:0475
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P | NVD · nvd@nist.gov (Primary) |
Advisories
- GHSA-5xf4-f2fq-f69j — Yarn Improper link resolution before file access (Link Following)
European references
- ENISA EUVD · EUVD-2020-0291
- GCVE · GCVE-0-2019-10773
Affected configurations (NVD CPE)
cpe:2.3:a:yarnpkg:yarn:*:*:*:*:*:*:*:*< 1.21.1
Affected products
| Product | Versions |
|---|---|
| Yarn | affected All versions prior to version 1.21.1 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |