{
  "GSD": {
    "alias": "CVE-2021-4235",
    "id": "GSD-2021-4235",
    "references": [
      "https://access.redhat.com/errata/RHSA-2022:7398",
      "https://access.redhat.com/errata/RHSA-2023:0569",
      "https://access.redhat.com/errata/RHSA-2023:0570"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-4235"
      ],
      "details": "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.",
      "id": "GSD-2021-4235",
      "modified": "2023-12-13T01:23:11.787283Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security@golang.org",
        "ID": "CVE-2021-4235",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "gopkg.in/yaml.v2",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "0",
                          "version_value": "2.2.3"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "gopkg.in/yaml.v2"
            },
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "github.com/go-yaml/yaml",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected"
                          }
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "github.com/go-yaml/yaml"
            }
          ]
        }
      },
      "credits": [
        {
          "lang": "en",
          "value": "@simonferquel"
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "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."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE 400: Uncontrolled Resource Consumption"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/go-yaml/yaml/pull/375",
            "refsource": "MISC",
            "url": "https://github.com/go-yaml/yaml/pull/375"
          },
          {
            "name": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241",
            "refsource": "MISC",
            "url": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241"
          },
          {
            "name": "https://pkg.go.dev/vuln/GO-2021-0061",
            "refsource": "MISC",
            "url": "https://pkg.go.dev/vuln/GO-2021-0061"
          },
          {
            "name": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html",
            "refsource": "MISC",
            "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html"
          }
        ]
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003c=v2.1.0",
          "affected_versions": "All versions up to 2.1.0",
          "cvss_v3": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-937"
          ],
          "date": "2023-02-09",
          "description": "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.",
          "fixed_versions": [],
          "identifier": "CVE-2021-4235",
          "identifiers": [
            "GHSA-r88r-gmrh-7j83",
            "CVE-2021-4235"
          ],
          "not_impacted": "",
          "package_slug": "go/github.com/go-yaml/yaml",
          "pubdate": "2022-12-28",
          "solution": "Unfortunately, there is no solution available yet.",
          "title": "YAML Go package vulnerable to denial of service",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-4235",
            "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://github.com/advisories/GHSA-r88r-gmrh-7j83"
          ],
          "uuid": "7e09e966-66ae-4600-85d2-ca3ed2e0c199",
          "versions": [
            {
              "commit": {
                "sha": "cb71201d00a1226edf8f89fb39955595fe32dfef",
                "tags": [
                  "v2.1.0"
                ],
                "timestamp": "20180223190116"
              },
              "number": "v2.1.0"
            }
          ]
        },
        {
          "affected_range": "\u003cv2.2.3",
          "affected_versions": "All versions before 2.2.3",
          "cwe_ids": [
            "CWE-1035",
            "CWE-937"
          ],
          "date": "2022-12-30",
          "description": "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.",
          "fixed_versions": [
            "v2.2.3"
          ],
          "identifier": "CVE-2021-4235",
          "identifiers": [
            "GHSA-r88r-gmrh-7j83",
            "CVE-2021-4235"
          ],
          "not_impacted": "All versions starting from 2.2.3",
          "package_slug": "go/gopkg.in/yaml.v2",
          "pubdate": "2022-12-28",
          "solution": "Upgrade to version 2.2.3 or above.",
          "title": "YAML Go package vulnerable to denial of service",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-4235",
            "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://github.com/advisories/GHSA-r88r-gmrh-7j83"
          ],
          "uuid": "36d853bc-a025-41e1-9c26-0af6d7b3c2c4",
          "versions": [
            {
              "commit": {
                "sha": "bb4e33bf68bf89cad44d386192cbed201f35b241",
                "tags": [
                  "v2.2.3"
                ],
                "timestamp": "20190930190921"
              },
              "number": "v2.2.3"
            }
          ]
        },
        {
          "affected_range": "\u003cv2.2.3",
          "affected_versions": "All versions before 2.2.3",
          "cvss_v3": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-937"
          ],
          "date": "2023-07-06",
          "description": "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.",
          "fixed_versions": [
            "v2.2.3"
          ],
          "identifier": "CVE-2021-4235",
          "identifiers": [
            "CVE-2021-4235"
          ],
          "not_impacted": "",
          "package_slug": "go/gopkg.in/yaml.v3",
          "pubdate": "2022-12-27",
          "solution": "Upgrade to version 2.2.3 or above.",
          "title": "Uncontrolled Resource Consumption",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-4235",
            "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241",
            "https://pkg.go.dev/vuln/GO-2021-0061",
            "https://github.com/go-yaml/yaml/pull/375"
          ],
          "uuid": "8c184f3f-cefd-45fe-af20-94a387e732fb",
          "versions": [
            {
              "commit": {
                "sha": "bb4e33bf68bf89cad44d386192cbed201f35b241",
                "tags": [
                  "v2.2.3"
                ],
                "timestamp": "20190930190921"
              },
              "number": "v2.2.3"
            }
          ]
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:yaml_project:yaml:*:*:*:*:*:go:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2.2.3",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "security@golang.org",
          "ID": "CVE-2021-4235"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "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."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "NVD-CWE-noinfo"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241"
            },
            {
              "name": "https://pkg.go.dev/vuln/GO-2021-0061",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://pkg.go.dev/vuln/GO-2021-0061"
            },
            {
              "name": "https://github.com/go-yaml/yaml/pull/375",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/go-yaml/yaml/pull/375"
            },
            {
              "name": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html",
              "refsource": "MISC",
              "tags": [],
              "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "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
        }
      },
      "lastModifiedDate": "2023-07-06T00:15Z",
      "publishedDate": "2022-12-27T22:15Z"
    }
  }
}