GHSA-5VCM-3XC3-W7X3高危已审查

Response Splitting from unsanitized headers

OSV 1.4.0 · github-reviewed · 修改于 2025-12-12 05:12

发布时间

2021-09-23 03:18

GitHub 审查时间

2021-09-22 00:10

NVD 发布时间

2021-09-22 02:15

源文件

advisories/github-reviewed/2021/09/GHSA-5vcm-3xc3-w7x3/GHSA-5vcm-3xc3-w7x3.json

公告说明

Impact

http4s is vulnerable to response-splitting or request-splitting attacks when untrusted user input is used to create any of the following fields:

Header names (Header.nameå
Header values (Header.value)
Status reason phrases (Status.reason)
URI paths (Uri.Path)
URI authority registered names (URI.RegName) (through 0.21)

The following backends render invalid carriage return, newline, or null characters in an unsafe fashion.

	blaze-server	ember-server	blaze-client	ember-client	jetty-client
header names	⚠	⚠	⚠	⚠	⚠
header values	⚠	⚠	⚠	⚠
status reasons	⚠	⚠
URI paths			⚠	⚠
URI regnames			⚠ < 0.22	⚠ < 0.22

For example, given the following service:

import cats.effect._
import org.http4s._
import org.http4s.dsl.io._
import org.http4s.server.blaze.BlazeServerBuilder
import scala.concurrent.ExecutionContext.global

object ResponseSplit extends IOApp {
  override def run(args: List[String]): IO[ExitCode] =
    BlazeServerBuilder[IO](global)
      .bindHttp(8080)
      .withHttpApp(httpApp)
      .resource
      .use(_ => IO.never)

  val httpApp: HttpApp[IO] =
    HttpApp[IO] { req =>
      req.params.get("author") match {
        case Some(author) =>
          Ok("The real content")
            .map(_.putHeaders(Header("Set-Cookie", s"author=${author}")))
        case None =>
          BadRequest("No author parameter")
      }
    }
}

标识信息

别名 / CVE

CVE-2021-41084

CWE

CWE-74CWE-918

软件生态

Maven

扩展资料

暂无扩展资料。

CVSS 评分

CVSS_V3

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

原始 OSV JSON

{
  "id": "GHSA-5vcm-3xc3-w7x3",
  "aliases": [
    "CVE-2021-41084"
  ],
  "details": "### Impact\n\nhttp4s is vulnerable to response-splitting or request-splitting attacks when untrusted user input is used to create any of the following fields:\n\n* Header names (`Header.name`å\n* Header values (`Header.value`)\n* Status reason phrases (`Status.reason`)\n* URI paths (`Uri.Path`)\n* URI authority registered names (`URI.RegName`) (through 0.21)\n\nThe following backends render invalid carriage return, newline, or null characters in an unsafe fashion.\n\n|                | blaze-server | ember-server | blaze-client | ember-client | jetty-client |\n|:---------------|:-------------|:-------------|:-------------|--------------|--------------|\n| header names   | ⚠            | ⚠            | ⚠            | ⚠            |   ⚠            | \n| header values  | ⚠            | ⚠            | ⚠            | ⚠            |              |\n| status reasons | ⚠            | ⚠            |              |              |              |\n| URI paths      |              |              |  ⚠             |  ⚠             |              |\n| URI regnames   |              |              |  ⚠ < 0.22           |  ⚠ < 0.22            |              |\n\nFor example, given the following service:\n\n```scala\nimport cats.effect._\nimport org.http4s._\nimport org.http4s.dsl.io._\nimport org.http4s.server.blaze.BlazeServerBuilder\nimport scala.concurrent.ExecutionContext.global\n\nobject ResponseSplit extends IOApp {\n  override def run(args: List[String]): IO[ExitCode] =\n    BlazeServerBuilder[IO](global)\n      .bindHttp(8080)\n      .withHttpApp(httpApp)\n      .resource\n      .use(_ => IO.never)\n\n  val httpApp: HttpApp[IO] =\n    HttpApp[IO] { req =>\n      req.params.get(\"author\") match {\n        case Some(author) =>\n          Ok(\"The real content\")\n            .map(_.putHeaders(Header(\"Set-Cookie\", s\"author=${author}\")))\n        case None =>\n          BadRequest(\"No author parameter\")\n      }\n    }\n}\n```\n\nA clean `author` parameter returns a clean response:\n\n```sh\ncurl -i 'http://localhost:8080/?author=Ross'\n```\n\n```http\nHTTP/1.1 200 OK\nContent-Type: text/plain; charset=UTF-8\nSet-Cookie: author=Ross\nDate: Mon, 20 Sep 2021 04:12:10 GMT\nContent-Length: 16\n\nThe real content\n```\n\nA malicious `author` parameter allows a user-agent to hijack the response from our server and return different content:\n\n```sh\ncurl -i 'http://localhost:8080/?author=hax0r%0d%0aContent-Length:+13%0d%0a%0aI+hacked+you'\n```\n\n```http\nHTTP/1.1 200 OK\nContent-Type: text/plain; charset=UTF-8\nSet-Cookie: author=hax0r\nContent-Length: 13\n\nI hacked you\n```\n\n### Patches\n\nVersions 0.21.29, 0.22.5, 0.23.4, and 1.0.0-M27 perform the following:\n\n* If a status reasoon phrase is invalid, it is dropped. Rendering is optional per spec.\n* If a header name is invalid in a request or response, the header is dropped.  There is no way to generically sanitize a header without potentially shadowing a correct one.\n* If a header value is invalid in a request or response, it is sanitized by replacing null (`\\u0000`), carriage return (`\\r`), and newline (`\\n`) with space (` `) characters per spec.\n* If a URI path or registered name is invalid in a request line, the client raises an `IllegalArgumentException`.\n* If a URI registered name is invalid in a host header, the client raises an `IllegalArgumentException`. \n\n### Workarounds\n\nhttp4s services and client applications should sanitize any user input in the aforementioned fields before returning a request or response to the backend.  The carriage return, newline, and null characters are the most threatening.\n\nNot all backends were affected: jetty-server, tomcat-server, armeria, and netty on the server; async-http-client, okhttp-client, armeria, and netty as clients.\n\n### References\n* https://owasp.org/www-community/attacks/HTTP_Response_Splitting\n* https://httpwg.org/http-core/draft-ietf-httpbis-semantics-latest.html#fields.values\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [GitHub](http://github.com/http4s/http4s)\n* Contact us via the [http4s security policy](https://github.com/http4s/http4s/security/policy)",
  "summary": "Response Splitting from unsanitized headers",
  "affected": [
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.21.29"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-client_2.12",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.21.28"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.22.0"
            },
            {
              "fixed": "0.22.5"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-client_2.12",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.22.4"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.23.0"
            },
            {
              "fixed": "0.23.4"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-client_2.12",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.23.3"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.21.29"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-client_2.13",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.21.28"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.22.0"
            },
            {
              "fixed": "0.22.5"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-client_2.13",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.22.4"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.23.0"
            },
            {
              "fixed": "0.23.4"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-client_2.13",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.23.3"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.21.29"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-client_3",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.21.28"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.22.0"
            },
            {
              "fixed": "0.22.5"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-client_3",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.22.4"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.23.0"
            },
            {
              "fixed": "0.23.4"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-client_3",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.23.3"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.21.28"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-server_2.10",
        "ecosystem": "Maven"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.21.28"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-server_2.11",
        "ecosystem": "Maven"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.21.29"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-server_2.12",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.21.28"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.22.0"
            },
            {
              "fixed": "0.22.5"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-server_2.12",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.22.4"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.23.0"
            },
            {
              "fixed": "0.23.4"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-server_2.12",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.23.3"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.21.29"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-server_2.13",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.21.28"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.22.0"
            },
            {
              "fixed": "0.22.5"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-server_2.13",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.22.4"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.23.0"
            },
            {
              "fixed": "0.23.4"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-server_2.13",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.23.3"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.21.28"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-server_2.13.0-M5",
        "ecosystem": "Maven"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.22.0"
            },
            {
              "fixed": "0.22.5"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-server_3",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.22.4"
      }
    },
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.23.0"
            },
            {
              "fixed": "0.23.4"
            }
          ]
        }
      ],
      "package": {
        "name": "org.http4s:http4s-server_3",
        "ecosystem": "Maven"
      },
      "database_specific": {
        "last_known_affected_version_range": "<= 0.23.3"
      }
    }
  ],
  "modified": "2025-12-11T21:12:05Z",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N"
    }
  ],
  "published": "2021-09-22T19:18:41Z",
  "references": [
    {
      "url": "https://github.com/http4s/http4s/security/advisories/GHSA-5vcm-3xc3-w7x3",
      "type": "WEB"
    },
    {
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41084",
      "type": "ADVISORY"
    },
    {
      "url": "https://github.com/http4s/http4s/commit/d02007db1da4f8f3df2dbf11f1db9ac7afc3f9d8",
      "type": "WEB"
    },
    {
      "url": "https://github.com/http4s/http4s",
      "type": "PACKAGE"
    },
    {
      "url": "https://httpwg.org/http-core/draft-ietf-httpbis-semantics-latest.html#fields.values",
      "type": "WEB"
    },
    {
      "url": "https://owasp.org/www-community/attacks/HTTP_Response_Splitting",
      "type": "WEB"
    }
  ],
  "schema_version": "1.4.0",
  "database_specific": {
    "cwe_ids": [
      "CWE-74",
      "CWE-918"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "nvd_published_at": "2021-09-21T18:15:00Z",
    "github_reviewed_at": "2021-09-21T16:10:13Z"
  }
}