gsd-2021-22865
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
An improper access control vulnerability was identified in GitHub Enterprise Server that allowed access tokens generated from a GitHub App's web authentication flow to read private repository metadata via the REST API without having been granted the appropriate permissions. To exploit this vulnerability, an attacker would need to create a GitHub App on the instance and have a user authorize the application through the web authentication flow. The private repository metadata returned would be limited to repositories owned by the user the token identifies. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.4 and was fixed in versions 3.0.4, 2.22.10, 2.21.18. This vulnerability was reported via the GitHub Bug Bounty program.
Aliases
Aliases
CVE-2021-22865


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-22865",
    "description": "An improper access control vulnerability was identified in GitHub Enterprise Server that allowed access tokens generated from a GitHub App\u0027s web authentication flow to read private repository metadata via the REST API without having been granted the appropriate permissions. To exploit this vulnerability, an attacker would need to create a GitHub App on the instance and have a user authorize the application through the web authentication flow. The private repository metadata returned would be limited to repositories owned by the user the token identifies. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.4 and was fixed in versions 3.0.4, 2.22.10, 2.21.18. This vulnerability was reported via the GitHub Bug Bounty program.",
    "id": "GSD-2021-22865"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-22865"
      ],
      "details": "An improper access control vulnerability was identified in GitHub Enterprise Server that allowed access tokens generated from a GitHub App\u0027s web authentication flow to read private repository metadata via the REST API without having been granted the appropriate permissions. To exploit this vulnerability, an attacker would need to create a GitHub App on the instance and have a user authorize the application through the web authentication flow. The private repository metadata returned would be limited to repositories owned by the user the token identifies. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.4 and was fixed in versions 3.0.4, 2.22.10, 2.21.18. This vulnerability was reported via the GitHub Bug Bounty program.",
      "id": "GSD-2021-22865",
      "modified": "2023-12-13T01:23:24.484264Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "product-cna@github.com",
        "ID": "CVE-2021-22865",
        "STATE": "PUBLIC",
        "TITLE": "Improper access control in GitHub Enterprise Server leading to unauthorized read access to private repository metadata"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "GitHub Enterprise Server",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "3.0",
                          "version_value": "3.0.4"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "2.22",
                          "version_value": "2.22.10"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "2.21",
                          "version_value": "2.21.18"
                        }
                      ]
                    }
                  }
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              },
              "vendor_name": "GitHub"
            }
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          "lang": "eng",
          "value": "djcruz93"
        }
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      "description": {
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            "value": "An improper access control vulnerability was identified in GitHub Enterprise Server that allowed access tokens generated from a GitHub App\u0027s web authentication flow to read private repository metadata via the REST API without having been granted the appropriate permissions. To exploit this vulnerability, an attacker would need to create a GitHub App on the instance and have a user authorize the application through the web authentication flow. The private repository metadata returned would be limited to repositories owned by the user the token identifies. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.4 and was fixed in versions 3.0.4, 2.22.10, 2.21.18. This vulnerability was reported via the GitHub Bug Bounty program."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-285: Improper Authorization"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://docs.github.com/en/enterprise-server@3.0/admin/release-notes#3.0.4",
            "refsource": "MISC",
            "url": "https://docs.github.com/en/enterprise-server@3.0/admin/release-notes#3.0.4"
          },
          {
            "name": "https://docs.github.com/en/enterprise-server@2.22/admin/release-notes#2.22.10",
            "refsource": "MISC",
            "url": "https://docs.github.com/en/enterprise-server@2.22/admin/release-notes#2.22.10"
          },
          {
            "name": "https://docs.github.com/en/enterprise-server@2.21/admin/release-notes#2.21.18",
            "refsource": "MISC",
            "url": "https://docs.github.com/en/enterprise-server@2.21/admin/release-notes#2.21.18"
          }
        ]
      },
      "source": {
        "discovery": "EXTERNAL"
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "3.0.4",
                "versionStartIncluding": "3.0.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2.22.10",
                "versionStartIncluding": "2.22.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2.21.18",
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              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "product-cna@github.com",
          "ID": "CVE-2021-22865"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "An improper access control vulnerability was identified in GitHub Enterprise Server that allowed access tokens generated from a GitHub App\u0027s web authentication flow to read private repository metadata via the REST API without having been granted the appropriate permissions. To exploit this vulnerability, an attacker would need to create a GitHub App on the instance and have a user authorize the application through the web authentication flow. The private repository metadata returned would be limited to repositories owned by the user the token identifies. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.4 and was fixed in versions 3.0.4, 2.22.10, 2.21.18. This vulnerability was reported via the GitHub Bug Bounty program."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
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                  "lang": "en",
                  "value": "NVD-CWE-Other"
                }
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        },
        "references": {
          "reference_data": [
            {
              "name": "https://docs.github.com/en/enterprise-server@2.21/admin/release-notes#2.21.18",
              "refsource": "MISC",
              "tags": [
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                "Vendor Advisory"
              ],
              "url": "https://docs.github.com/en/enterprise-server@2.21/admin/release-notes#2.21.18"
            },
            {
              "name": "https://docs.github.com/en/enterprise-server@2.22/admin/release-notes#2.22.10",
              "refsource": "MISC",
              "tags": [
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                "Vendor Advisory"
              ],
              "url": "https://docs.github.com/en/enterprise-server@2.22/admin/release-notes#2.22.10"
            },
            {
              "name": "https://docs.github.com/en/enterprise-server@3.0/admin/release-notes#3.0.4",
              "refsource": "MISC",
              "tags": [
                "Release Notes",
                "Vendor Advisory"
              ],
              "url": "https://docs.github.com/en/enterprise-server@3.0/admin/release-notes#3.0.4"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": true
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2022-10-25T14:04Z",
      "publishedDate": "2021-04-02T18:15Z"
    }
  }
}


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