GSD-2021-22969

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
Concrete CMS (formerly concrete5) versions below 8.5.7 has a SSRF mitigation bypass using DNS Rebind attack giving an attacker the ability to fetch cloud IAAS (ex AWS) IAM keys.To fix this Concrete CMS no longer allows downloads from the local network and specifies the validated IP when downloading rather than relying on DNS.Discoverer: Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )The Concrete CMS team gave this a CVSS 3.1 score of 3.5 AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N . Please note that Cloud IAAS provider mis-configurations are not Concrete CMS vulnerabilities. A mitigation for this vulnerability is to make sure that the IMDS configurations are according to a cloud provider's best practices.This fix is also in Concrete version 9.0.0
Aliases
Aliases
CVE-2021-22969
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{
  "GSD": {
    "alias": "CVE-2021-22969",
    "description": "Concrete CMS (formerly concrete5) versions below 8.5.7 has a SSRF mitigation bypass using DNS Rebind attack giving an attacker the ability to fetch cloud IAAS (ex AWS) IAM keys.To fix this Concrete CMS no longer allows downloads from the local network and specifies the validated IP when downloading rather than relying on DNS.Discoverer: Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )The Concrete CMS team gave this a CVSS 3.1 score of 3.5 AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N . Please note that Cloud IAAS provider mis-configurations are not Concrete CMS vulnerabilities. A mitigation for this vulnerability is to make sure that the IMDS configurations are according to a cloud provider\u0027s best practices.This fix is also in Concrete version 9.0.0",
    "id": "GSD-2021-22969"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-22969"
      ],
      "details": "Concrete CMS (formerly concrete5) versions below 8.5.7 has a SSRF mitigation bypass using DNS Rebind attack giving an attacker the ability to fetch cloud IAAS (ex AWS) IAM keys.To fix this Concrete CMS no longer allows downloads from the local network and specifies the validated IP when downloading rather than relying on DNS.Discoverer: Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )The Concrete CMS team gave this a CVSS 3.1 score of 3.5 AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N . Please note that Cloud IAAS provider mis-configurations are not Concrete CMS vulnerabilities. A mitigation for this vulnerability is to make sure that the IMDS configurations are according to a cloud provider\u0027s best practices.This fix is also in Concrete version 9.0.0",
      "id": "GSD-2021-22969",
      "modified": "2023-12-13T01:23:24.508424Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ID": "CVE-2021-22969",
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      },
      "affects": {
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          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "https://github.com/concrete5/concrete5",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "Affected version Concrete CMS (concrete5) 8.5.6 and below. Fixed in Concrete CMS version 8.5.7 and 9.0.0"
                        }
                      ]
                    }
                  }
                ]
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              "vendor_name": "n/a"
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            "value": "Concrete CMS (formerly concrete5) versions below 8.5.7 has a SSRF mitigation bypass using DNS Rebind attack giving an attacker the ability to fetch cloud IAAS (ex AWS) IAM keys.To fix this Concrete CMS no longer allows downloads from the local network and specifies the validated IP when downloading rather than relying on DNS.Discoverer: Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )The Concrete CMS team gave this a CVSS 3.1 score of 3.5 AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N . Please note that Cloud IAAS provider mis-configurations are not Concrete CMS vulnerabilities. A mitigation for this vulnerability is to make sure that the IMDS configurations are according to a cloud provider\u0027s best practices.This fix is also in Concrete version 9.0.0"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
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            "description": [
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                "value": "Server-Side Request Forgery (SSRF) (CWE-918)"
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      },
      "references": {
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            "refsource": "MISC",
            "url": "https://hackerone.com/reports/1369312"
          },
          {
            "name": "https://documentation.concretecms.org/developers/introduction/version-history/857-release-notes",
            "refsource": "MISC",
            "url": "https://documentation.concretecms.org/developers/introduction/version-history/857-release-notes"
          }
        ]
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    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003c8.5.7",
          "affected_versions": "All versions before 8.5.7",
          "cvss_v2": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-918",
            "CWE-937"
          ],
          "date": "2021-11-23",
          "description": "Concrete CMS (formerly concrete5) versions below 8.5.7 has a SSRF mitigation bypass using DNS Rebind attack giving an attacker the ability to fetch cloud IAAS (ex AWS) IAM keys.To fix this Concrete CMS no longer allows downloads from the local network and specifies the validated IP when downloading rather than relying on DNS.Discoverer: Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )The Concrete CMS team gave this a CVSS 3.1 score of 3.5 AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N . Please note that Cloud IAAS provider mis-configurations are not Concrete CMS vulnerabilities. A mitigation for this vulnerability is to make sure that the IMDS configurations are according to a cloud provider\u0027s best practices.This fix is also in Concrete version 9.0.0",
          "fixed_versions": [
            "8.5.7"
          ],
          "identifier": "CVE-2021-22969",
          "identifiers": [
            "GHSA-mcxr-fx5f-96qq",
            "CVE-2021-22969"
          ],
          "not_impacted": "All versions starting from 8.5.7",
          "package_slug": "packagist/concrete5/core",
          "pubdate": "2021-11-23",
          "solution": "Upgrade to version 8.5.7 or above.",
          "title": "Server-Side Request Forgery (SSRF)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-22969",
            "https://hackerone.com/reports/1369312",
            "https://documentation.concretecms.org/developers/introduction/version-history/857-release-notes",
            "https://github.com/advisories/GHSA-mcxr-fx5f-96qq"
          ],
          "uuid": "cbc6a0df-b2a2-4bc7-813b-7f11f13dca90"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
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        "nodes": [
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            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "8.5.7",
                "vulnerable": true
              }
            ],
            "operator": "OR"
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      "cve": {
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          "ASSIGNER": "cve-assignments@hackerone.com",
          "ID": "CVE-2021-22969"
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        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "Concrete CMS (formerly concrete5) versions below 8.5.7 has a SSRF mitigation bypass using DNS Rebind attack giving an attacker the ability to fetch cloud IAAS (ex AWS) IAM keys.To fix this Concrete CMS no longer allows downloads from the local network and specifies the validated IP when downloading rather than relying on DNS.Discoverer: Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )The Concrete CMS team gave this a CVSS 3.1 score of 3.5 AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N . Please note that Cloud IAAS provider mis-configurations are not Concrete CMS vulnerabilities. A mitigation for this vulnerability is to make sure that the IMDS configurations are according to a cloud provider\u0027s best practices.This fix is also in Concrete version 9.0.0"
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-918"
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        },
        "references": {
          "reference_data": [
            {
              "name": "https://documentation.concretecms.org/developers/introduction/version-history/857-release-notes",
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                "Vendor Advisory"
              ],
              "url": "https://documentation.concretecms.org/developers/introduction/version-history/857-release-notes"
            },
            {
              "name": "https://hackerone.com/reports/1369312",
              "refsource": "MISC",
              "tags": [
                "Permissions Required"
              ],
              "url": "https://hackerone.com/reports/1369312"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.0,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 1.4
        }
      },
      "lastModifiedDate": "2021-11-23T13:35Z",
      "publishedDate": "2021-11-19T19:15Z"
    }
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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