Vulnerability-Lookup

GSD-2021-41819

Vulnerability from gsd - Updated: 2021-11-24 00:00

Details

The old versions of `CGI::Cookie.parse` applied URL decoding to cookie names. An attacker could exploit this vulnerability to spoof security prefixes in cookie names, which may be able to trick a vulnerable application. By this fix, `CGI::Cookie.parse` no longer decodes cookie names. Note that this is an incompatibility if cookie names that you are using include non-alphanumeric characters that are URL-encoded. This is the same issue of CVE-2020-8184. If you are using Ruby 2.7 or 3.0: * Please update the cgi gem to version 0.3.1, 0.2,1, and 0.1,1 or later. You can use `gem update cgi` to update it. If you are using bundler, please add `gem "cgi", ">= 0.3.1"`` to your `Gemfile`. * Alternatively, please update Ruby to 2.7.5 or 3.0.3. If you are using Ruby 2.6: * Please update Ruby to 2.6.9. You cannot use `gem update cgi` for Ruby 2.6 or prior.

Aliases

CVE-2021-41819

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-41819",
    "description": "CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby.",
    "id": "GSD-2021-41819",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-41819.html",
      "https://www.debian.org/security/2022/dsa-5066",
      "https://www.debian.org/security/2022/dsa-5067",
      "https://access.redhat.com/errata/RHSA-2022:0708",
      "https://access.redhat.com/errata/RHSA-2022:0582",
      "https://access.redhat.com/errata/RHSA-2022:0581",
      "https://access.redhat.com/errata/RHSA-2022:0544",
      "https://access.redhat.com/errata/RHSA-2022:0543",
      "https://ubuntu.com/security/CVE-2021-41819",
      "https://advisories.mageia.org/CVE-2021-41819.html",
      "https://security.archlinux.org/CVE-2021-41819",
      "https://linux.oracle.com/cve/CVE-2021-41819.html",
      "https://access.redhat.com/errata/RHSA-2022:5779",
      "https://access.redhat.com/errata/RHSA-2022:6447",
      "https://access.redhat.com/errata/RHSA-2022:6450",
      "https://access.redhat.com/errata/RHSA-2022:6855",
      "https://access.redhat.com/errata/RHSA-2022:6856"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "affected": [
        {
          "package": {
            "ecosystem": "RubyGems",
            "name": "cgi",
            "purl": "pkg:gem/cgi"
          }
        }
      ],
      "aliases": [
        "CVE-2021-41819",
        "GHSA-4vf4-qmvg-mh7h"
      ],
      "details": "The old versions of `CGI::Cookie.parse` applied URL decoding to cookie names.\nAn attacker could exploit this vulnerability to spoof security prefixes in\ncookie names, which may be able to trick a vulnerable application.\n\nBy this fix, `CGI::Cookie.parse` no longer decodes cookie names. Note that\nthis is an incompatibility if cookie names that you are using include\nnon-alphanumeric characters that are URL-encoded.\n\nThis is the same issue of CVE-2020-8184.\n\nIf you are using Ruby 2.7 or 3.0:\n\n* Please update the cgi gem to version 0.3.1, 0.2,1, and 0.1,1 or later. You\n  can use `gem update cgi` to update it. If you are using bundler, please add\n  `gem \"cgi\", \"\u003e= 0.3.1\"`` to your `Gemfile`.\n* Alternatively, please update Ruby to 2.7.5 or 3.0.3.\n\nIf you are using Ruby 2.6:\n\n* Please update Ruby to 2.6.9. You cannot use `gem update cgi` for Ruby 2.6 or\n  prior.",
      "id": "GSD-2021-41819",
      "modified": "2021-11-24T00:00:00.000Z",
      "published": "2021-11-24T00:00:00.000Z",
      "references": [
        {
          "type": "WEB",
          "url": "https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/"
        }
      ],
      "related": [
        "CVE-2020-8184"
      ],
      "schema_version": "1.4.0",
      "severity": [
        {
          "score": 7.5,
          "type": "CVSS_V3"
        }
      ],
      "summary": "Cookie Prefix Spoofing in CGI::Cookie.parse"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2021-41819",
        "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": "CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://hackerone.com/reports/910552",
            "refsource": "MISC",
            "url": "https://hackerone.com/reports/910552"
          },
          {
            "name": "https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/",
            "refsource": "CONFIRM",
            "url": "https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/"
          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20220121-0003/",
            "refsource": "CONFIRM",
            "url": "https://security.netapp.com/advisory/ntap-20220121-0003/"
          },
          {
            "name": "FEDORA-2022-82a9edac27",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/"
          },
          {
            "name": "FEDORA-2022-8cf0124add",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/"
          },
          {
            "name": "GLSA-202401-27",
            "refsource": "GENTOO",
            "url": "https://security.gentoo.org/glsa/202401-27"
          }
        ]
      }
    },
    "github.com/rubysec/ruby-advisory-db": {
      "cve": "2021-41819",
      "cvss_v3": 7.5,
      "date": "2021-11-24",
      "description": "The old versions of `CGI::Cookie.parse` applied URL decoding to cookie names.\nAn attacker could exploit this vulnerability to spoof security prefixes in\ncookie names, which may be able to trick a vulnerable application.\n\nBy this fix, `CGI::Cookie.parse` no longer decodes cookie names. Note that\nthis is an incompatibility if cookie names that you are using include\nnon-alphanumeric characters that are URL-encoded.\n\nThis is the same issue of CVE-2020-8184.\n\nIf you are using Ruby 2.7 or 3.0:\n\n* Please update the cgi gem to version 0.3.1, 0.2,1, and 0.1,1 or later. You\n  can use `gem update cgi` to update it. If you are using bundler, please add\n  `gem \"cgi\", \"\u003e= 0.3.1\"`` to your `Gemfile`.\n* Alternatively, please update Ruby to 2.7.5 or 3.0.3.\n\nIf you are using Ruby 2.6:\n\n* Please update Ruby to 2.6.9. You cannot use `gem update cgi` for Ruby 2.6 or\n  prior.",
      "gem": "cgi",
      "ghsa": "4vf4-qmvg-mh7h",
      "patched_versions": [
        "~\u003e 0.1.0.1",
        "~\u003e 0.1.1",
        "~\u003e 0.2.1",
        "\u003e= 0.3.1"
      ],
      "related": {
        "cve": [
          "2020-8184"
        ]
      },
      "title": "Cookie Prefix Spoofing in CGI::Cookie.parse",
      "url": "https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/"
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003e=0.1.0 \u003c=0.3.0",
          "affected_versions": "All versions starting from 0.1.0 up to 0.3.0",
          "cvss_v2": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-565",
            "CWE-937"
          ],
          "date": "2022-09-10",
          "description": "CGI::Cookie.parse in Ruby mishandles security prefixes in cookie names. This also affects the CGI gem for Ruby.",
          "fixed_versions": [
            "0.3.1"
          ],
          "identifier": "CVE-2021-41819",
          "identifiers": [
            "CVE-2021-41819"
          ],
          "not_impacted": "All versions before 0.1.0, all versions after 0.3.0",
          "package_slug": "gem/cgi",
          "pubdate": "2022-01-01",
          "solution": "Upgrade to version 0.3.1 or above.",
          "title": "Reliance on Cookies without Validation and Integrity Checking in a Security Decision",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-41819",
            "https://hackerone.com/reports/910552",
            "https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/"
          ],
          "uuid": "884c99ae-8baa-4a77-94fe-f0434735f233"
        }
      ]
    },
    "nvd.nist.gov": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:ruby-lang:cgi:0.1.0:*:*:*:*:ruby:*:*",
                    "matchCriteriaId": "2DEC113F-FF5D-48DC-896B-E1C8A2C76C9C",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:ruby-lang:cgi:0.2.0:*:*:*:*:ruby:*:*",
                    "matchCriteriaId": "59B7F28D-757D-429F-88B5-7A8DAFB9BB4C",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:ruby-lang:cgi:0.3.0:*:*:*:*:ruby:*:*",
                    "matchCriteriaId": "C8CB09D2-66DD-4E05-B9FC-F1C632C6942F",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "64AC442C-39CB-477C-9356-F36AF6762E53",
                    "versionEndIncluding": "2.6.8",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "D7B53365-0B48-4408-A4A7-9A3744F89F07",
                    "versionEndExcluding": "2.7.5",
                    "versionStartIncluding": "2.7.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "D4499575-33A0-47D7-A88B-0E6FD2340792",
                    "versionEndExcluding": "3.0.3",
                    "versionStartIncluding": "3.0.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:redhat:software_collections:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "749804DA-4B27-492A-9ABA-6BB562A6B3AC",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:suse:linux_enterprise:11.0:sp1:*:*:*:*:*:*",
                    "matchCriteriaId": "4500161F-13A0-4369-B93A-778B34E7F005",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:suse:linux_enterprise:12.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "CBC8B78D-1131-4F21-919D-8AC79A410FB9",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:suse:linux_enterprise:15.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "1607628F-77A7-4C1F-98DF-0DC50AE8627D",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:opensuse:factory:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "E29492E1-43D8-43BF-94E3-26A762A66FAA",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B009C22E-30A4-4288-BCF6-C3E81DEAF45A",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
                    "matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby."
          },
          {
            "lang": "es",
            "value": "CGI::Cookie.parse en Ruby versiones hasta 2.6.8, maneja inapropiadamente los prefijos de seguridad en los nombres de las cookies. Esto tambi\u00e9n afecta a CGI gem versiones hasta 0.3.0 para Ruby."
          }
        ],
        "id": "CVE-2021-41819",
        "lastModified": "2024-01-24T05:15:11.853",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 5.0,
                "confidentialityImpact": "NONE",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2022-01-01T06:15:07.293",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Permissions Required",
              "Third Party Advisory"
            ],
            "url": "https://hackerone.com/reports/910552"
          },
          {
            "source": "cve@mitre.org",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/"
          },
          {
            "source": "cve@mitre.org",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/"
          },
          {
            "source": "cve@mitre.org",
            "url": "https://security.gentoo.org/glsa/202401-27"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20220121-0003/"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Exploit",
              "Vendor Advisory"
            ],
            "url": "https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-565"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}

CVE-2021-41819 (GCVE-0-2021-41819)

Vulnerability from cvelistv5 – Published: 2022-01-01 00:00 – Updated: 2025-05-22 15:00

Summary

CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-22 14:43 UTC

CWE

n/a
CWE-565 - Reliance on Cookies without Validation and Integrity Checking

Assigner

mitre CNA under the mitre root

CNA scorecard E 29/100 over 2337 records in the last 180 days details

References

6 references

URL	Tags
https://hackerone.com/reports/910552
https://www.ruby-lang.org/en/news/2021/11/24/cook…
https://security.netapp.com/advisory/ntap-2022012…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://security.gentoo.org/glsa/202401-27	vendor-advisory

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T03:22:24.942Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/910552"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20220121-0003/"
          },
          {
            "name": "FEDORA-2022-82a9edac27",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/"
          },
          {
            "name": "FEDORA-2022-8cf0124add",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/"
          },
          {
            "name": "GLSA-202401-27",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202401-27"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-41819",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-05-22T14:43:38.811242Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-565",
                "description": "CWE-565 Reliance on Cookies without Validation and Integrity Checking",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-05-22T15:00:52.998Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-01-24T05:06:40.201Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://hackerone.com/reports/910552"
        },
        {
          "url": "https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20220121-0003/"
        },
        {
          "name": "FEDORA-2022-82a9edac27",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/"
        },
        {
          "name": "FEDORA-2022-8cf0124add",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/"
        },
        {
          "name": "GLSA-202401-27",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/202401-27"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-41819",
    "datePublished": "2022-01-01T00:00:00.000Z",
    "dateReserved": "2021-09-29T00:00:00.000Z",
    "dateUpdated": "2025-05-22T15:00:52.998Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

GHSA-4VF4-QMVG-MH7H

Vulnerability from github – Published: 2022-01-21 23:22 – Updated: 2023-08-29 16:46

Summary

Cookie Prefix Spoofing in CGI::Cookie.parse

Details

CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem prior to versions 0.3.1, 0.2.1, 0.1.1, and 0.1.0.1 for Ruby.

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "cgi"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.3.0"
            },
            {
              "fixed": "0.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.3.0"
      ]
    },
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "cgi"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.2.0"
            },
            {
              "fixed": "0.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.2.0"
      ]
    },
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "cgi"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.1.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-41819"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-565"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-01-13T18:53:26Z",
    "nvd_published_at": "2022-01-01T06:15:00Z",
    "severity": "HIGH"
  },
  "details": "CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem prior to versions 0.3.1, 0.2.1, 0.1.1, and 0.1.0.1 for Ruby.",
  "id": "GHSA-4vf4-qmvg-mh7h",
  "modified": "2023-08-29T16:46:42Z",
  "published": "2022-01-21T23:22:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41819"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/910552"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ruby/cgi"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2021-41819.yml"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202401-27"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20220121-0003"
    },
    {
      "type": "WEB",
      "url": "https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Cookie Prefix Spoofing in CGI::Cookie.parse"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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

GSD-2021-41819

CVE-2021-41819 (GCVE-0-2021-41819)

GHSA-4VF4-QMVG-MH7H

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour