fkie_nvd - fkie_cve-2021-4235

fkie_cve-2021-4235

Vulnerability from fkie_nvd

Published

2022-12-27 22:15

Modified

2025-04-11 17:15

Severity ?

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

Summary

Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.

References

URL	Tags
security@golang.org	https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241	Patch, Third Party Advisory
security@golang.org	https://github.com/go-yaml/yaml/pull/375	Exploit, Patch, Third Party Advisory
security@golang.org	https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html
security@golang.org	https://pkg.go.dev/vuln/GO-2021-0061	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/go-yaml/yaml/pull/375	Exploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html
af854a3a-2127-422b-91ae-364da2661108	https://pkg.go.dev/vuln/GO-2021-0061	Third Party Advisory

Impacted products

	Vendor	Product	Version
	yaml_project	yaml	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:yaml_project:yaml:*:*:*:*:*:go:*:*",
              "matchCriteriaId": "6ADB4662-19BA-4FB2-88FB-0D8309DE5DB0",
              "versionEndExcluding": "2.2.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector."
    },
    {
      "lang": "es",
      "value": "Debido a la b\u00fasqueda ilimitada de alias, un archivo YAML creado con fines malintencionados puede hacer que el sistema consuma importantes recursos. Si se analiza la entrada del usuario, esto se puede utilizar como un vector de denegaci\u00f3n de servicio."
    }
  ],
  "id": "CVE-2021-4235",
  "lastModified": "2025-04-11T17:15:35.497",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2022-12-27T22:15:11.960",
  "references": [
    {
      "source": "security@golang.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241"
    },
    {
      "source": "security@golang.org",
      "tags": [
        "Exploit",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/go-yaml/yaml/pull/375"
    },
    {
      "source": "security@golang.org",
      "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html"
    },
    {
      "source": "security@golang.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://pkg.go.dev/vuln/GO-2021-0061"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/go-yaml/yaml/pull/375"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://pkg.go.dev/vuln/GO-2021-0061"
    }
  ],
  "sourceIdentifier": "security@golang.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-4235 (GCVE-0-2021-4235)

Vulnerability from cvelistv5

Published

2022-12-27 21:13

Modified

2025-04-11 16:25

Severity ?

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

CWE

CWE 400: Uncontrolled Resource Consumption

Summary

Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.

References

▼	URL	Tags
	https://github.com/go-yaml/yaml/pull/375
	https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241
	https://pkg.go.dev/vuln/GO-2021-0061
	https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html

Impacted products

Vendor

Product

Version

▼

gopkg.in/yaml.v2

Version: 0 ≤

github.com/go-yaml/yaml

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:23:09.096Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/go-yaml/yaml/pull/375"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://pkg.go.dev/vuln/GO-2021-0061"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-4235",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-11T16:24:34.544009Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-11T16:25:11.371Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "gopkg.in/yaml.v2",
          "product": "gopkg.in/yaml.v2",
          "programRoutines": [
            {
              "name": "decoder.unmarshal"
            },
            {
              "name": "Decoder.Decode"
            },
            {
              "name": "Unmarshal"
            },
            {
              "name": "UnmarshalStrict"
            }
          ],
          "vendor": "gopkg.in/yaml.v2",
          "versions": [
            {
              "lessThan": "2.2.3",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "affected",
          "packageName": "github.com/go-yaml/yaml",
          "product": "github.com/go-yaml/yaml",
          "programRoutines": [
            {
              "name": "decoder.unmarshal"
            },
            {
              "name": "Decoder.Decode"
            },
            {
              "name": "Unmarshal"
            },
            {
              "name": "UnmarshalStrict"
            }
          ],
          "vendor": "github.com/go-yaml/yaml"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "@simonferquel"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE 400: Uncontrolled Resource Consumption",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-07-05T23:06:18.281Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://github.com/go-yaml/yaml/pull/375"
        },
        {
          "url": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2021-0061"
        },
        {
          "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html"
        }
      ],
      "title": "Denial of service in gopkg.in/yaml.v2"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2021-4235",
    "datePublished": "2022-12-27T21:13:42.393Z",
    "dateReserved": "2022-07-29T18:56:20.415Z",
    "dateUpdated": "2025-04-11T16:25:11.371Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted