ubuntu-cve-2020-14001
Vulnerability from osv_ubuntu
Published
2020-07-17 16:15
Modified
2025-10-24 04:48
Summary
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
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ruby-kramdown",
            "binary_version": "1.10.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "ruby-kramdown",
        "purl": "pkg:deb/ubuntu/ruby-kramdown@1.10.0-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.0-1",
        "1.10.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ruby-kramdown",
            "binary_version": "1.15.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "ruby-kramdown",
        "purl": "pkg:deb/ubuntu/ruby-kramdown@1.15.0-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.14.0-1",
        "1.15.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "kramdown",
            "binary_version": "1.17.0-4ubuntu0.1"
          },
          {
            "binary_name": "ruby-kramdown",
            "binary_version": "1.17.0-4ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "ruby-kramdown",
        "purl": "pkg:deb/ubuntu/ruby-kramdown@1.17.0-4ubuntu0.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.17.0-4ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.17.0-1",
        "1.17.0-2",
        "1.17.0-4"
      ]
    }
  ],
  "aliases": [],
  "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": "UBUNTU-CVE-2020-14001",
  "modified": "2025-10-24T04:48:31Z",
  "published": "2020-07-17T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-14001"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gettalong/kramdown/commit/1b8fd33c3120bfc6e5164b449e2c2fc9c9306fde"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gettalong/kramdown"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gettalong/kramdown/compare/REL_2_2_1...REL_2_3_0"
    },
    {
      "type": "REPORT",
      "url": "https://kramdown.gettalong.org"
    },
    {
      "type": "REPORT",
      "url": "https://kramdown.gettalong.org/news.html"
    },
    {
      "type": "REPORT",
      "url": "https://rubygems.org/gems/kramdown"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4562-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4562-2"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-14001"
    }
  ],
  "related": [
    "USN-4562-1",
    "USN-4562-2"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-14001"
  ]
}



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