GHSA-5XF4-F2FQ-F69J

Vulnerability from github – Published: 2020-02-14 23:10 – Updated: 2023-09-08 22:40
VLAI?
Summary
Yarn Improper link resolution before file access (Link Following)
Details

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.

Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.21.1"
      },
      "package": {
        "ecosystem": "npm",
        "name": "yarn"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.22.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2019-10773"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-02-13T21:01:35Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-5xf4-f2fq-f69j",
  "modified": "2023-09-08T22:40:47Z",
  "published": "2020-02-14T23:10:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-10773"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yarnpkg/yarn/issues/7761#issuecomment-565493023"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yarnpkg/yarn/pull/7755"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yarnpkg/yarn/commit/039bafd74b7b1a88a53a54f8fa6fa872615e90e7"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2020:0475"
    },
    {
      "type": "WEB",
      "url": "https://blog.daniel-ruf.de/critical-design-flaw-npm-pnpm-yarn"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3HIZW4NZVV5QY5WWGW2JRP3FHYKZ6ZJ5"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ITY5BC63CCC647DFNUQRQ5AJDKUKUNBI"
    },
    {
      "type": "WEB",
      "url": "https://snyk.io/vuln/SNYK-JS-YARN-537806,"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Yarn Improper link resolution before file access (Link Following)"
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.