Vulnerability-Lookup

OESA-2021-1280 (CVE-2020-14001)

Vulnerability from osv_openeuler – Published: 2021-07-27 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

rubygem-kramdown security update

Details

kramdown is yet-another-markdown-parser but fast, pure Ruby, using a strict syntax definition and supporting several common extensions.

Security Fix(es):

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.(CVE-2020-14001)

Severity

9.8 (Critical)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

URL

Type

	https://openeuler.org/en/security/safety-bulletin…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2020-14001	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "noarch": [
          "rubygem-kramdown-help-2.1.0-3.oe1.noarch.rpm",
          "rubygem-kramdown-2.1.0-3.oe1.noarch.rpm"
        ],
        "src": [
          "rubygem-kramdown-2.1.0-3.oe1.src.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "rubygem-kramdown",
        "purl": "pkg:rpm/openEuler/rubygem-kramdown\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.0-3.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "noarch": [
          "rubygem-kramdown-2.1.0-3.oe1.noarch.rpm",
          "rubygem-kramdown-help-2.1.0-3.oe1.noarch.rpm"
        ],
        "src": [
          "rubygem-kramdown-2.1.0-3.oe1.src.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP2",
        "name": "rubygem-kramdown",
        "purl": "pkg:rpm/openEuler/rubygem-kramdown\u0026distro=openEuler-20.03-LTS-SP2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.0-3.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Critical"
  },
  "details": "kramdown is yet-another-markdown-parser but fast, pure Ruby, using a strict syntax definition and supporting several common extensions.\r\n\r\nSecurity Fix(es):\r\n\r\nThe 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=\u0026quot;/etc/passwd\u0026quot;) or unintended embedded Ruby code execution (such as a string that begins with template=\u0026quot;string://\u0026lt;%= `). NOTE: kramdown is used in Jekyll, GitLab Pages, GitHub Pages, and Thredded Forum.(CVE-2020-14001)",
  "id": "OESA-2021-1280",
  "modified": "2026-08-06T11:04:31Z",
  "published": "2021-07-27T11:04:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1280"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-14001"
    }
  ],
  "schema_version": "1.7.2",
  "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": "rubygem-kramdown security update",
  "upstream": [
    "CVE-2020-14001"
  ]
}

CVE-2020-14001 (GCVE-0-2020-14001)

Vulnerability from cvelistv5 – Published: 2020-07-17 15:27 – Updated: 2024-08-04 12:32

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

13 references

URL	Tags
https://github.com/gettalong/kramdown	x_refsource_MISC
https://kramdown.gettalong.org	x_refsource_MISC
https://rubygems.org/gems/kramdown	x_refsource_MISC
https://kramdown.gettalong.org/news.html	x_refsource_CONFIRM
https://github.com/gettalong/kramdown/commit/1b8f…	x_refsource_CONFIRM
https://github.com/gettalong/kramdown/compare/REL…	x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2020073…	x_refsource_CONFIRM
https://lists.apache.org/thread.html/r96df7899fbb…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://www.debian.org/security/2020/dsa-4743	vendor-advisoryx_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://usn.ubuntu.com/4562-1/	vendor-advisoryx_refsource_UBUNTU

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T12:32:14.657Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/gettalong/kramdown"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://kramdown.gettalong.org"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://rubygems.org/gems/kramdown"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://kramdown.gettalong.org/news.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/gettalong/kramdown/commit/1b8fd33c3120bfc6e5164b449e2c2fc9c9306fde"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/gettalong/kramdown/compare/REL_2_2_1...REL_2_3_0"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20200731-0004/"
          },
          {
            "name": "[fluo-notifications] 20200808 [GitHub] [fluo-website] ctubbsii opened a new pull request #194: Update gems",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.apache.org/thread.html/r96df7899fbb456fe2705882f710a0c8e8614b573fbffd8d12e3f54d2%40%3Cnotifications.fluo.apache.org%3E"
          },
          {
            "name": "[debian-lts-announce] 20200809 [SECURITY] [DLA 2316-1] ruby-kramdown security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00014.html"
          },
          {
            "name": "DSA-4743",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2020/dsa-4743"
          },
          {
            "name": "FEDORA-2020-f6eee9a2d3",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KBLTGBYU7NKOUOHDKVCU4GFZMGA6BP4L/"
          },
          {
            "name": "FEDORA-2020-5c70d97eca",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ENMMGKHRQIZ3QKGOMBBBGB6B4LB5I7NQ/"
          },
          {
            "name": "USN-4562-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4562-1/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-10-06T15:06:17.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/gettalong/kramdown"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://kramdown.gettalong.org"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://rubygems.org/gems/kramdown"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://kramdown.gettalong.org/news.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/gettalong/kramdown/commit/1b8fd33c3120bfc6e5164b449e2c2fc9c9306fde"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/gettalong/kramdown/compare/REL_2_2_1...REL_2_3_0"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20200731-0004/"
        },
        {
          "name": "[fluo-notifications] 20200808 [GitHub] [fluo-website] ctubbsii opened a new pull request #194: Update gems",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.apache.org/thread.html/r96df7899fbb456fe2705882f710a0c8e8614b573fbffd8d12e3f54d2%40%3Cnotifications.fluo.apache.org%3E"
        },
        {
          "name": "[debian-lts-announce] 20200809 [SECURITY] [DLA 2316-1] ruby-kramdown security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00014.html"
        },
        {
          "name": "DSA-4743",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2020/dsa-4743"
        },
        {
          "name": "FEDORA-2020-f6eee9a2d3",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KBLTGBYU7NKOUOHDKVCU4GFZMGA6BP4L/"
        },
        {
          "name": "FEDORA-2020-5c70d97eca",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ENMMGKHRQIZ3QKGOMBBBGB6B4LB5I7NQ/"
        },
        {
          "name": "USN-4562-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4562-1/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-14001",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "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."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/gettalong/kramdown",
              "refsource": "MISC",
              "url": "https://github.com/gettalong/kramdown"
            },
            {
              "name": "https://kramdown.gettalong.org",
              "refsource": "MISC",
              "url": "https://kramdown.gettalong.org"
            },
            {
              "name": "https://rubygems.org/gems/kramdown",
              "refsource": "MISC",
              "url": "https://rubygems.org/gems/kramdown"
            },
            {
              "name": "https://kramdown.gettalong.org/news.html",
              "refsource": "CONFIRM",
              "url": "https://kramdown.gettalong.org/news.html"
            },
            {
              "name": "https://github.com/gettalong/kramdown/commit/1b8fd33c3120bfc6e5164b449e2c2fc9c9306fde",
              "refsource": "CONFIRM",
              "url": "https://github.com/gettalong/kramdown/commit/1b8fd33c3120bfc6e5164b449e2c2fc9c9306fde"
            },
            {
              "name": "https://github.com/gettalong/kramdown/compare/REL_2_2_1...REL_2_3_0",
              "refsource": "CONFIRM",
              "url": "https://github.com/gettalong/kramdown/compare/REL_2_2_1...REL_2_3_0"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20200731-0004/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20200731-0004/"
            },
            {
              "name": "[fluo-notifications] 20200808 [GitHub] [fluo-website] ctubbsii opened a new pull request #194: Update gems",
              "refsource": "MLIST",
              "url": "https://lists.apache.org/thread.html/r96df7899fbb456fe2705882f710a0c8e8614b573fbffd8d12e3f54d2@%3Cnotifications.fluo.apache.org%3E"
            },
            {
              "name": "[debian-lts-announce] 20200809 [SECURITY] [DLA 2316-1] ruby-kramdown security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00014.html"
            },
            {
              "name": "DSA-4743",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2020/dsa-4743"
            },
            {
              "name": "FEDORA-2020-f6eee9a2d3",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KBLTGBYU7NKOUOHDKVCU4GFZMGA6BP4L/"
            },
            {
              "name": "FEDORA-2020-5c70d97eca",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ENMMGKHRQIZ3QKGOMBBBGB6B4LB5I7NQ/"
            },
            {
              "name": "USN-4562-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4562-1/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-14001",
    "datePublished": "2020-07-17T15:27:54.000Z",
    "dateReserved": "2020-06-10T00:00:00.000Z",
    "dateUpdated": "2024-08-04T12:32:14.657Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.