gsd-2019-16785
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
Waitress through version 1.3.1 implemented a "MAY" part of the RFC7230 which states: "Although the line terminator for the start-line and header fields is the sequence CRLF, a recipient MAY recognize a single LF as a line terminator and ignore any preceding CR." Unfortunately if a front-end server does not parse header fields with an LF the same way as it does those with a CRLF it can lead to the front-end and the back-end server parsing the same HTTP message in two different ways. This can lead to a potential for HTTP request smuggling/splitting whereby Waitress may see two requests while the front-end server only sees a single HTTP message. This issue is fixed in Waitress 1.4.0.
Aliases
Aliases
CVE-2019-16785


To clipboard 

{
  "GSD": {
    "alias": "CVE-2019-16785",
    "description": "Waitress through version 1.3.1 implemented a \"MAY\" part of the RFC7230 which states: \"Although the line terminator for the start-line and header fields is the sequence CRLF, a recipient MAY recognize a single LF as a line terminator and ignore any preceding CR.\" Unfortunately if a front-end server does not parse header fields with an LF the same way as it does those with a CRLF it can lead to the front-end and the back-end server parsing the same HTTP message in two different ways. This can lead to a potential for HTTP request smuggling/splitting whereby Waitress may see two requests while the front-end server only sees a single HTTP message. This issue is fixed in Waitress 1.4.0.",
    "id": "GSD-2019-16785",
    "references": [
      "https://www.suse.com/security/cve/CVE-2019-16785.html",
      "https://access.redhat.com/errata/RHSA-2021:0420",
      "https://access.redhat.com/errata/RHSA-2020:0720",
      "https://advisories.mageia.org/CVE-2019-16785.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2019-16785"
      ],
      "details": "Waitress through version 1.3.1 implemented a \"MAY\" part of the RFC7230 which states: \"Although the line terminator for the start-line and header fields is the sequence CRLF, a recipient MAY recognize a single LF as a line terminator and ignore any preceding CR.\" Unfortunately if a front-end server does not parse header fields with an LF the same way as it does those with a CRLF it can lead to the front-end and the back-end server parsing the same HTTP message in two different ways. This can lead to a potential for HTTP request smuggling/splitting whereby Waitress may see two requests while the front-end server only sees a single HTTP message. This issue is fixed in Waitress 1.4.0.",
      "id": "GSD-2019-16785",
      "modified": "2023-12-13T01:23:40.525045Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2019-16785",
        "STATE": "PUBLIC",
        "TITLE": "HTTP Request Smuggling: LF vs CRLF handling in Waitress"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Waitress",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c=",
                          "version_name": "\u003c= 1.3.1",
                          "version_value": "1.3.1"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Pylons"
            }
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            "lang": "eng",
            "value": "Waitress through version 1.3.1 implemented a \"MAY\" part of the RFC7230 which states: \"Although the line terminator for the start-line and header fields is the sequence CRLF, a recipient MAY recognize a single LF as a line terminator and ignore any preceding CR.\" Unfortunately if a front-end server does not parse header fields with an LF the same way as it does those with a CRLF it can lead to the front-end and the back-end server parsing the same HTTP message in two different ways. This can lead to a potential for HTTP request smuggling/splitting whereby Waitress may see two requests while the front-end server only sees a single HTTP message. This issue is fixed in Waitress 1.4.0."
          }
        ]
      },
      "impact": {
        "cvss": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-444 Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request Smuggling\u0027)"
              }
            ]
          }
        ]
      },
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          {
            "name": "FEDORA-2020-bdcc8ffc24",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GVDHR2DNKCNQ7YQXISJ45NT4IQDX3LJ7/"
          },
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LYEOTGWJZVKPRXX2HBNVIYWCX73QYPM5/"
          },
          {
            "name": "RHSA-2020:0720",
            "refsource": "REDHAT",
            "url": "https://access.redhat.com/errata/RHSA-2020:0720"
          },
          {
            "name": "https://www.oracle.com/security-alerts/cpuapr2022.html",
            "refsource": "MISC",
            "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
          },
          {
            "name": "https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes",
            "refsource": "MISC",
            "url": "https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes"
          },
          {
            "name": "https://github.com/Pylons/waitress/security/advisories/GHSA-pg36-wpm5-g57p",
            "refsource": "CONFIRM",
            "url": "https://github.com/Pylons/waitress/security/advisories/GHSA-pg36-wpm5-g57p"
          },
          {
            "name": "https://github.com/Pylons/waitress/commit/8eba394ad75deaf9e5cd15b78a3d16b12e6b0eba",
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            "url": "https://github.com/Pylons/waitress/commit/8eba394ad75deaf9e5cd15b78a3d16b12e6b0eba"
          },
          {
            "name": "[debian-lts-announce] 20220512 [SECURITY] [DLA 3000-1] waitress security update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-pg36-wpm5-g57p",
        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003c=1.3.1",
          "affected_versions": "All versions up to 1.3.1",
          "cvss_v2": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-444",
            "CWE-937"
          ],
          "date": "2019-12-31",
          "description": "Waitress implemented an optional part of the RFC7230 which states: \"Although the line terminator for the start-line and header fields is the sequence CRLF, a recipient may recognize a single LF as a line terminator and ignore any preceding CR.\" Unfortunately if a front-end server does not parse header fields with an LF the same way as it does those with a CRLF it can lead to the front-end and the back-end server parsing the same HTTP message in two different ways. This can lead to a potential for HTTP request smuggling/splitting whereby Waitress may see two requests while the front-end server only sees a single HTTP message.",
          "fixed_versions": [
            "1.4.0"
          ],
          "identifier": "CVE-2019-16785",
          "identifiers": [
            "CVE-2019-16785",
            "GHSA-pg36-wpm5-g57p"
          ],
          "not_impacted": "All versions after 1.3.1",
          "package_slug": "pypi/waitress",
          "pubdate": "2019-12-20",
          "solution": "Upgrade to version 1.4.0 or above.",
          "title": "Inconsistent Interpretation of HTTP Requests (HTTP Request Smuggling)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2019-16785",
            "https://docs.pylonsproject.org/projects/waitress/en/latest/#security-fixes"
          ],
          "uuid": "7a135a12-bb93-45d8-8f04-14a08920c27b"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
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        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:agendaless:waitress:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "1.3.1",
                "vulnerable": true
              }
            ],
            "operator": "OR"
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            "cpe_match": [
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          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
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            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*",
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            }
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/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": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2022-09-23T18:58Z",
      "publishedDate": "2019-12-20T23:15Z"
    }
  }
}


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