Vulnerability-Lookup

CVE-2022-39209 (GCVE-0-2022-39209)

Vulnerability from cvelistv5 – Published: 2022-09-15 00:00 – Updated: 2025-04-23 17:10

Title

Uncontrolled Resource Consumption in cmark-gfm

Summary

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running `python3 -c 'print("![l"* 100000 + "\n")' | ./cmark-gfm -e autolink`, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-23 15:51 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M mitre root

References

6 references

URL	Tags
https://github.com/github/cmark-gfm/security/advi…
https://github.com/github/cmark-gfm/commit/9d57d8…
https://en.wikipedia.org/wiki/Time_complexity
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
github	cmark-gfm	Affected: < 0.29.0.gfm.6	guessed

Show details on NVD website

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}

FKIE_CVE-2022-39209

Vulnerability from fkie_nvd - Published: 2022-09-15 18:15 - Updated: 2026-06-17 04:57

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://en.wikipedia.org/wiki/Time_complexity	Third Party Advisory
security-advisories@github.com	https://github.com/github/cmark-gfm/commit/9d57d8a23142b316282bdfc954cb0ecda40a8655	Patch, Third Party Advisory
security-advisories@github.com	https://github.com/github/cmark-gfm/security/advisories/GHSA-cgh3-p57x-9q7q	Third Party Advisory
security-advisories@github.com	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JIUCZN3PEKUCT2JQYQTYOVIJG2KSD6G7/
security-advisories@github.com	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JMGP65NANDVKPDMXMKYO2ZV2H2HZJY4P/
security-advisories@github.com	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEAAAI4OULDYQ2TA3HOXH54PC3DCBFZS/
af854a3a-2127-422b-91ae-364da2661108	https://en.wikipedia.org/wiki/Time_complexity	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/github/cmark-gfm/commit/9d57d8a23142b316282bdfc954cb0ecda40a8655	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/github/cmark-gfm/security/advisories/GHSA-cgh3-p57x-9q7q	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JIUCZN3PEKUCT2JQYQTYOVIJG2KSD6G7/
af854a3a-2127-422b-91ae-364da2661108	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JMGP65NANDVKPDMXMKYO2ZV2H2HZJY4P/
af854a3a-2127-422b-91ae-364da2661108	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEAAAI4OULDYQ2TA3HOXH54PC3DCBFZS/

Impacted products

Vendor	Product	Version
github	cmark-gfm	*
fedoraproject	fedora	35
fedoraproject	fedora	36
fedoraproject	fedora	37

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
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          "product": "cmark-gfm",
          "vendor": "github",
          "versions": [
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              "versionEndExcluding": "0.29.0.gfm.6",
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  "cveTags": [],
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      "lang": "en",
      "value": "cmark-gfm is GitHub\u0027s fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm\u0027s autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running `python3 -c \u0027print(\"![l\"* 100000 + \"\\n\")\u0027 | ./cmark-gfm -e autolink`, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension."
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      "lang": "es",
      "value": "cmark-gfm es la bifurcaci\u00f3n de GitHub de cmark, una biblioteca de an\u00e1lisis y renderizaci\u00f3n de CommonMark y un programa en C. En versiones anteriores a 0.29.0.gfm.6, un problema de complejidad de tiempo polin\u00f3mico en la extensi\u00f3n de autolink de cmark-gfm puede conllevar a un agotamiento de recursos sin l\u00edmites y la consiguiente denegaci\u00f3n de servicio. Los usuarios pueden verificar el parche al ejecutar \"python3 -c \"print(\"![l \"* 100000 + \"\\n\")\u0027 | ./cmark-gfm -e autolink\", que agotar\u00e1 los recursos en cmark-gfm sin parchear, pero ser\u00e1 mostrado correctamente en cmark-gfm parcheado. Esta vulnerabilidad ha sido parcheada en versi\u00f3n 0.29.0.gfm.6. Es recomendado a usuarios actualizar. Los usuarios que no puedan actualizares deber\u00e1n deshabilitar el uso de la extensi\u00f3n autolink"
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        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-407"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GSD-2022-39209

Vulnerability from gsd - Updated: 2023-12-13 01:19

Details

Aliases

CVE-2022-39209

Aliases

CVE-2022-39209

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2022-39209",
    "description": "cmark-gfm is GitHub\u0027s fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm\u0027s autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running `python3 -c \u0027print(\"![l\"* 100000 + \"\\n\")\u0027 | ./cmark-gfm -e autolink`, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension.",
    "id": "GSD-2022-39209"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2022-39209"
      ],
      "details": "cmark-gfm is GitHub\u0027s fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm\u0027s autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running `python3 -c \u0027print(\"![l\"* 100000 + \"\\n\")\u0027 | ./cmark-gfm -e autolink`, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension.",
      "id": "GSD-2022-39209",
      "modified": "2023-12-13T01:19:20.725941Z",
      "schema_version": "1.4.0"
    }
  },
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        "ID": "CVE-2022-39209",
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        "TITLE": "Uncontrolled Resource Consumption in cmark-gfm"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "cmark-gfm",
                    "version": {
                      "version_data": [
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                          "version_value": "\u003c 0.29.0.gfm.6"
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      "description": {
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          {
            "lang": "eng",
            "value": "cmark-gfm is GitHub\u0027s fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm\u0027s autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running `python3 -c \u0027print(\"![l\"* 100000 + \"\\n\")\u0027 | ./cmark-gfm -e autolink`, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension."
          }
        ]
      },
      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
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          "confidentialityImpact": "NONE",
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          },
          {
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          },
          {
            "name": "FEDORA-2022-dc6d6d9d6c",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UEAAAI4OULDYQ2TA3HOXH54PC3DCBFZS/"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-cgh3-p57x-9q7q",
        "discovery": "UNKNOWN"
      }
    },
    "nvd.nist.gov": {
      "configurations": {
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            "children": [],
            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:github:cmark-gfm:*:*:*:*:*:*:*:*",
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        "description": {
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              "value": "cmark-gfm is GitHub\u0027s fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm\u0027s autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running `python3 -c \u0027print(\"![l\"* 100000 + \"\\n\")\u0027 | ./cmark-gfm -e autolink`, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
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                "Third Party Advisory"
              ],
              "url": "https://github.com/github/cmark-gfm/security/advisories/GHSA-cgh3-p57x-9q7q"
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              "name": "https://en.wikipedia.org/wiki/Time_complexity",
              "refsource": "MISC",
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                "Third Party Advisory"
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              "name": "https://github.com/github/cmark-gfm/commit/9d57d8a23142b316282bdfc954cb0ecda40a8655",
              "refsource": "MISC",
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                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/github/cmark-gfm/commit/9d57d8a23142b316282bdfc954cb0ecda40a8655"
            },
            {
              "name": "FEDORA-2022-f1aed93db8",
              "refsource": "FEDORA",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JIUCZN3PEKUCT2JQYQTYOVIJG2KSD6G7/"
            },
            {
              "name": "FEDORA-2022-6bcee2cc93",
              "refsource": "FEDORA",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JMGP65NANDVKPDMXMKYO2ZV2H2HZJY4P/"
            },
            {
              "name": "FEDORA-2022-dc6d6d9d6c",
              "refsource": "FEDORA",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UEAAAI4OULDYQ2TA3HOXH54PC3DCBFZS/"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-07-11T20:54Z",
      "publishedDate": "2022-09-15T18:15Z"
    }
  }
}

UBUNTU-CVE-2022-39209 (CVE-2022-39209)

Vulnerability from osv_ubuntu – Published: 2022-09-15 18:15 – Updated: 2026-04-22 07:41 – Source website

Details

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running python3 -c 'print("![l"* 100000 + "\n")' | ./cmark-gfm -e autolink, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension.

Severity

7.5 (High)


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

6.5 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2022-39209	REPORT
	https://github.com/github/cmark-gfm/security/advi…	REPORT
	https://en.wikipedia.org/wiki/Time_complexity	REPORT
	https://github.com/github/cmark-gfm/commit/9d57d8…	REPORT
	https://www.cve.org/CVERecord?id=CVE-2022-39209	REPORT
	https://ubuntu.com/security/notices/USN-7319-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "cmark-gfm",
            "binary_version": "0.29.0.gfm.0-4ubuntu0.1~esm1"
          },
          {
            "binary_name": "libcmark-gfm-extensions0",
            "binary_version": "0.29.0.gfm.0-4ubuntu0.1~esm1"
          },
          {
            "binary_name": "libcmark-gfm0",
            "binary_version": "0.29.0.gfm.0-4ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "cmark-gfm",
        "purl": "pkg:deb/ubuntu/cmark-gfm@0.29.0.gfm.0-4ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.29.0.gfm.0-4ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.28.3.gfm.20-3",
        "0.29.0.gfm.0-3",
        "0.29.0.gfm.0-4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "cmark-gfm",
            "binary_version": "0.29.0.gfm.3-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "libcmark-gfm-extensions0.29.0.gfm.3",
            "binary_version": "0.29.0.gfm.3-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "libcmark-gfm0.29.0.gfm.3",
            "binary_version": "0.29.0.gfm.3-3ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "cmark-gfm",
        "purl": "pkg:deb/ubuntu/cmark-gfm@0.29.0.gfm.3-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.29.0.gfm.3-3ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.29.0.gfm.0-6",
        "0.29.0.gfm.2-1",
        "0.29.0.gfm.2-1+really.0.29.0.gfm.0ubuntu1",
        "0.29.0.gfm.2-2",
        "0.29.0.gfm.3-3"
      ]
    }
  ],
  "aliases": [],
  "details": "cmark-gfm is GitHub\u0027s fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm\u0027s autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running `python3 -c \u0027print(\"![l\"* 100000 + \"\\n\")\u0027 | ./cmark-gfm -e autolink`, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension.",
  "id": "UBUNTU-CVE-2022-39209",
  "modified": "2026-04-22T07:41:40Z",
  "published": "2022-09-15T18:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-39209"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/github/cmark-gfm/security/advisories/GHSA-cgh3-p57x-9q7q"
    },
    {
      "type": "REPORT",
      "url": "https://en.wikipedia.org/wiki/Time_complexity"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/github/cmark-gfm/commit/9d57d8a23142b316282bdfc954cb0ecda40a8655"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2022-39209"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7319-1"
    }
  ],
  "related": [
    "USN-7319-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2022-39209"
  ]
}

WID-SEC-W-2022-1935

Vulnerability from csaf_certbund - Published: 2022-11-01 23:00 - Updated: 2023-04-02 22:00

Summary

Microsoft GitHub Enterprise: Mehrere Schwachstellen

Severity

Hoch

Scope

3 vulnerabilities in this advisory, including CVE-2022-39209.

CVE-2022-39209

Es existiert eine Schwachstelle in Microsoft GitHub Enterprise. Diese besteht in der "Autolink"-Erweiterung der Komponente "cmark-gfm" und führt zu einem erhöhten Ressourcenverbrauch. Ein entfernter, anonymer Angreifer kann diese Schwachstellen ausnutzen, um einen Denial of Service Zustand herbeizuführen.

Known affected: 3 products

Open the full advisory

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.

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.

Action not permitted

CVE-2022-39209 (GCVE-0-2022-39209)

FKIE_CVE-2022-39209

GSD-2022-39209

UBUNTU-CVE-2022-39209 (CVE-2022-39209)

WID-SEC-W-2022-1935

Tags

Sightings

Nomenclature

Related by attack behaviour