{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.openapitools:openapi-generator"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-21430"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269",
      "CWE-377",
      "CWE-378",
      "CWE-379",
      "CWE-668"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-10T19:25:35Z",
    "nvd_published_at": "2021-05-10T20:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\n**This vulnerability impacts generated code.** If this code was generated as a one-off occasion, not as a part of an automated CI/CD process, this code will remain vulnerable until fixed manually!\n\nOn Unix-Like systems, the system temporary directory is shared between all local users. When files/directories are created, the default `umask` settings for the process are respected. As a result, by default, most processes/apis will create files/directories with the permissions `-rw-r--r--` and `drwxr-xr-x` respectively, unless an API that explicitly sets safe file permissions is used.\n\nThis vulnerability exists due to the use of the JDK method `File.createTempFile`. This method creates an insecure temporary files that can leave application and system data vulnerable to exposure.\n\nAuto-generated code (Java, Scala) that deals with uploading or downloading binary data through API endpoints will create insecure temporary files during the process. For example, if the API endpoint returns a PDF file, the auto-generated clients will first download the PDF into a insecure temporary file that can be read by anyone on the system.\n\nAffected generators: \n - Java\n   - `okhttp-gson` (default library)\n     https://github.com/OpenAPITools/openapi-generator/blob/d85f61ff0cfd6b8cd7063a63f302998a51466269/modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/ApiClient.mustache#L1085-L1088\n   - `jersey2`\n     https://github.com/OpenAPITools/openapi-generator/blob/d85f61ff0cfd6b8cd7063a63f302998a51466269/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/ApiClient.mustache#L1035-L1038\n   - `resteasy`\n     https://github.com/OpenAPITools/openapi-generator/blob/d85f61ff0cfd6b8cd7063a63f302998a51466269/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/ApiClient.mustache#L604-L607\n   - `retrofit2`\n      https://github.com/OpenAPITools/openapi-generator/blob/d85f61ff0cfd6b8cd7063a63f302998a51466269/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/play26/ApiClient.mustache#L202-L208\n - Scala\n   - `scala-finch`\n      https://github.com/OpenAPITools/openapi-generator/blob/764a3b044c19fadf4a0789473cde96a65b77868a/modules/openapi-generator/src/main/resources/scala-finch/api.mustache#L83-L88\n   - `scala-akka`\n      https://github.com/OpenAPITools/openapi-generator/blob/150e24dc553a8ea5230ffb938ed3e6020e972faa/modules/openapi-generator/src/main/resources/scala-akka-http-server/multipartDirectives.mustache#L71-L73\n\n### Patches\n\nThe issue has been patched by changing the generated code to use the JDK method `Files.createTempFile` and released in the v5.1.0 stable version.\n\nThis vulnerability has the same root cause as CVE-2021-21364 from the `swagger-api/swagger-codegen` project as this project and that one both share the same original source tree.\nhttps://github.com/swagger-api/swagger-codegen/security/advisories/GHSA-hpv8-9rq5-hq7w\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [OpenAPI Generator Github repo](https://github.com/openAPITools/openapi-generator/)\n* Email us at [security@openapitools.org](mailto:security@openapitools.org)",
  "id": "GHSA-cqxr-xf2w-943w",
  "modified": "2022-10-25T20:33:52Z",
  "published": "2021-05-11T00:05:06Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-cqxr-xf2w-943w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21430"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OpenAPITools/openapi-generator/pull/8787"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OpenAPITools/openapi-generator/pull/8791"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OpenAPITools/openapi-generator/pull/9348"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/OpenAPITools/openapi-generator"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Creation of Temporary File in Directory with Insecure Permissions in auto-generated Java, Scala code"
}

{
  "GSD": {
    "alias": "CVE-2021-21430",
    "description": "OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec. Using `File.createTempFile` in JDK will result in creating and using insecure temporary files that can leave application and system data vulnerable to attacks. Auto-generated code (Java, Scala) that deals with uploading or downloading binary data through API endpoints will create insecure temporary files during the process. Affected generators: `java` (jersey2, okhttp-gson (default library)), `scala-finch`. The issue has been patched with `Files.createTempFile` and released in the v5.1.0 stable version.",
    "id": "GSD-2021-21430",
    "references": [
      "https://security.archlinux.org/CVE-2021-21430"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-21430"
      ],
      "details": "OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec. Using `File.createTempFile` in JDK will result in creating and using insecure temporary files that can leave application and system data vulnerable to attacks. Auto-generated code (Java, Scala) that deals with uploading or downloading binary data through API endpoints will create insecure temporary files during the process. Affected generators: `java` (jersey2, okhttp-gson (default library)), `scala-finch`. The issue has been patched with `Files.createTempFile` and released in the v5.1.0 stable version.",
      "id": "GSD-2021-21430",
      "modified": "2023-12-13T01:23:10.766626Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-21430",
        "STATE": "PUBLIC",
        "TITLE": "Creation of Temporary File in Directory with Insecure Permissions in auto-generated Java, Scala code"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "openapi-generator",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "\u003c 5.1.0"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "OpenAPITools"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec. Using `File.createTempFile` in JDK will result in creating and using insecure temporary files that can leave application and system data vulnerable to attacks. Auto-generated code (Java, Scala) that deals with uploading or downloading binary data through API endpoints will create insecure temporary files during the process. Affected generators: `java` (jersey2, okhttp-gson (default library)), `scala-finch`. The issue has been patched with `Files.createTempFile` and released in the v5.1.0 stable version."
          }
        ]
      },
      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 6.2,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-269: Improper Privilege Management"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-cqxr-xf2w-943w",
            "refsource": "CONFIRM",
            "url": "https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-cqxr-xf2w-943w"
          },
          {
            "name": "https://github.com/OpenAPITools/openapi-generator/pull/8791",
            "refsource": "MISC",
            "url": "https://github.com/OpenAPITools/openapi-generator/pull/8791"
          },
          {
            "name": "https://github.com/OpenAPITools/openapi-generator/pull/8787",
            "refsource": "MISC",
            "url": "https://github.com/OpenAPITools/openapi-generator/pull/8787"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-cqxr-xf2w-943w",
        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "(,5.1.1)",
          "affected_versions": "All versions before 5.1.1",
          "cvss_v2": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "cvss_v3": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-668",
            "CWE-937"
          ],
          "date": "2022-10-24",
          "description": "OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec. okhttp-gson (default library)), `scala-finch`.",
          "fixed_versions": [
            "5.1.1"
          ],
          "identifier": "CVE-2021-21430",
          "identifiers": [
            "CVE-2021-21430",
            "GHSA-cqxr-xf2w-943w"
          ],
          "not_impacted": "All versions starting from 5.1.1",
          "package_slug": "maven/org.openapitools/openapi-generator",
          "pubdate": "2021-05-10",
          "solution": "Upgrade to version 5.1.1 or above.",
          "title": "Improper Privilege Management",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-21430"
          ],
          "uuid": "88fb9c22-d769-4706-b0f3-7c21fd6da11c"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:openapi-generator:openapi_generator:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "5.1.1",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2021-21430"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec. Using `File.createTempFile` in JDK will result in creating and using insecure temporary files that can leave application and system data vulnerable to attacks. Auto-generated code (Java, Scala) that deals with uploading or downloading binary data through API endpoints will create insecure temporary files during the process. Affected generators: `java` (jersey2, okhttp-gson (default library)), `scala-finch`. The issue has been patched with `Files.createTempFile` and released in the v5.1.0 stable version."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-668"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-cqxr-xf2w-943w",
              "refsource": "CONFIRM",
              "tags": [
                "Exploit",
                "Third Party Advisory"
              ],
              "url": "https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-cqxr-xf2w-943w"
            },
            {
              "name": "https://github.com/OpenAPITools/openapi-generator/pull/8787",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/OpenAPITools/openapi-generator/pull/8787"
            },
            {
              "name": "https://github.com/OpenAPITools/openapi-generator/pull/8791",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/OpenAPITools/openapi-generator/pull/8791"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 2.1,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "LOW",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2022-10-24T20:46Z",
      "publishedDate": "2021-05-10T20:15Z"
    }
  }
}