gsd-2021-22864
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration options used by GitHub Pages were not sufficiently restricted and made it possible to override environment variables leading to code execution on the GitHub Enterprise Server instance. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.3 and was fixed in 3.0.3, 2.22.9, and 2.21.17. This vulnerability was reported via the GitHub Bug Bounty program.
Aliases
Aliases
CVE-2021-22864


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-22864",
    "description": "A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration options used by GitHub Pages were not sufficiently restricted and made it possible to override environment variables leading to code execution on the GitHub Enterprise Server instance. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.3 and was fixed in 3.0.3, 2.22.9, and 2.21.17. This vulnerability was reported via the GitHub Bug Bounty program.",
    "id": "GSD-2021-22864"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-22864"
      ],
      "details": "A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration options used by GitHub Pages were not sufficiently restricted and made it possible to override environment variables leading to code execution on the GitHub Enterprise Server instance. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.3 and was fixed in 3.0.3, 2.22.9, and 2.21.17. This vulnerability was reported via the GitHub Bug Bounty program.",
      "id": "GSD-2021-22864",
      "modified": "2023-12-13T01:23:24.632940Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "product-cna@github.com",
        "ID": "CVE-2021-22864",
        "STATE": "PUBLIC",
        "TITLE": "Unsafe configuration options in GitHub Pages leading to remote code execution on GitHub Enterprise Server"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "GitHub Enterprise Server",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "2.21",
                          "version_value": "2.21.17"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "2.22",
                          "version_value": "2.22.9"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "3.0",
                          "version_value": "3.0.3"
                        }
                      ]
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              "vendor_name": "GitHub"
            }
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            "value": "A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration options used by GitHub Pages were not sufficiently restricted and made it possible to override environment variables leading to code execution on the GitHub Enterprise Server instance. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.3 and was fixed in 3.0.3, 2.22.9, and 2.21.17. This vulnerability was reported via the GitHub Bug Bounty program."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-77: Command Injection - Generic"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://docs.github.com/en/enterprise-server@2.21/admin/release-notes#2.21.17",
            "refsource": "MISC",
            "url": "https://docs.github.com/en/enterprise-server@2.21/admin/release-notes#2.21.17"
          },
          {
            "name": "https://docs.github.com/en/enterprise-server@2.22/admin/release-notes#2.22.9",
            "refsource": "MISC",
            "url": "https://docs.github.com/en/enterprise-server@2.22/admin/release-notes#2.22.9"
          },
          {
            "name": "https://docs.github.com/en/enterprise-server@3.0/admin/release-notes#3.0.3",
            "refsource": "MISC",
            "url": "https://docs.github.com/en/enterprise-server@3.0/admin/release-notes#3.0.3"
          }
        ]
      },
      "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": "2.21.17",
                "versionStartIncluding": "2.21.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2.22.9",
                "versionStartIncluding": "2.22.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "3.0.3",
                "versionStartIncluding": "3.0.0",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "product-cna@github.com",
          "ID": "CVE-2021-22864"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration options used by GitHub Pages were not sufficiently restricted and made it possible to override environment variables leading to code execution on the GitHub Enterprise Server instance. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.3 and was fixed in 3.0.3, 2.22.9, and 2.21.17. This vulnerability was reported via the GitHub Bug Bounty program."
            }
          ]
        },
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        "references": {
          "reference_data": [
            {
              "name": "https://docs.github.com/en/enterprise-server@2.21/admin/release-notes#2.21.17",
              "refsource": "MISC",
              "tags": [
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                "Third Party Advisory"
              ],
              "url": "https://docs.github.com/en/enterprise-server@2.21/admin/release-notes#2.21.17"
            },
            {
              "name": "https://docs.github.com/en/enterprise-server@2.22/admin/release-notes#2.22.9",
              "refsource": "MISC",
              "tags": [
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                "Third Party Advisory"
              ],
              "url": "https://docs.github.com/en/enterprise-server@2.22/admin/release-notes#2.22.9"
            },
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              "name": "https://docs.github.com/en/enterprise-server@3.0/admin/release-notes#3.0.3",
              "refsource": "MISC",
              "tags": [
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                "Third Party Advisory"
              ],
              "url": "https://docs.github.com/en/enterprise-server@3.0/admin/release-notes#3.0.3"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 6.5,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 8.0,
          "impactScore": 6.4,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2023-06-30T17:50Z",
      "publishedDate": "2021-03-23T22:15Z"
    }
  }
}


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