GHSA-MQM2-CGPR-P4M6

Vulnerability from github – Published: 2020-08-07 22:27 – Updated: 2022-04-29 20:26
VLAI?
Summary
Unintended read access in kramdown gem
Details

The kramdown gem before 2.3.0 for Ruby processes the template option inside Kramdown documents by default, which allows unintended read access (such as template="/etc/passwd") or unintended embedded Ruby code execution (such as a string that begins with template="string://<%= `). NOTE: kramdown is used in Jekyll, GitLab Pages, GitHub Pages, and Thredded Forum.

Severity ?
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "kramdown"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-14001"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-08-07T22:27:22Z",
    "nvd_published_at": "2020-07-17T16:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "The kramdown gem before 2.3.0 for Ruby processes the template option inside Kramdown documents by default, which allows unintended read access (such as template=\"/etc/passwd\") or unintended embedded Ruby code execution (such as a string that begins with template=\"string://\u003c%= `). NOTE: kramdown is used in Jekyll, GitLab Pages, GitHub Pages, and Thredded Forum.",
  "id": "GHSA-mqm2-cgpr-p4m6",
  "modified": "2022-04-29T20:26:19Z",
  "published": "2020-08-07T22:27:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-14001"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gettalong/kramdown/commit/1b8fd33c3120bfc6e5164b449e2c2fc9c9306fde"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-mqm2-cgpr-p4m6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/gettalong/kramdown"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gettalong/kramdown/compare/REL_2_2_1...REL_2_3_0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/kramdown/CVE-2020-14001.yml"
    },
    {
      "type": "WEB",
      "url": "https://kramdown.gettalong.org"
    },
    {
      "type": "WEB",
      "url": "https://kramdown.gettalong.org/news.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r96df7899fbb456fe2705882f710a0c8e8614b573fbffd8d12e3f54d2@%3Cnotifications.fluo.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00014.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ENMMGKHRQIZ3QKGOMBBBGB6B4LB5I7NQ"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KBLTGBYU7NKOUOHDKVCU4GFZMGA6BP4L"
    },
    {
      "type": "WEB",
      "url": "https://rubygems.org/gems/kramdown"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20200731-0004"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4562-1"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2020/dsa-4743"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Unintended read access in kramdown gem"
}


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