pysec - pysec-2022-169

pysec-2022-169

Vulnerability from pysec

Published

2022-03-17 13:15

Modified

2022-03-28 18:41

Details

Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using Waitress versions 2.1.0 and prior behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends. This would allow requests to be smuggled via the front-end proxy to waitress and later behavior. There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory: The use of Python's int() to parse strings into integers, leading to +10 to be parsed as 10, or 0x01 to be parsed as 1, where as the standard specifies that the string should contain only digits or hex digits; and Waitress does not support chunk extensions, however it was discarding them without validating that they did not contain illegal characters. This vulnerability has been patched in Waitress 2.1.1. A workaround is available. When deploying a proxy in front of waitress, turning on any and all functionality to make sure that the request matches the RFC7230 standard. Certain proxy servers may not have this functionality though and users are encouraged to upgrade to the latest version of waitress instead.

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "waitress",
        "purl": "pkg:pypi/waitress"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9e0b8c801e4d505c2ffc91b891af4ba48af715e0"
            }
          ],
          "repo": "https://github.com/Pylons/waitress",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.1",
        "0.2",
        "0.3",
        "0.4",
        "0.5",
        "0.6",
        "0.6.1",
        "0.7",
        "0.8",
        "0.8.1",
        "0.8.10",
        "0.8.11b0",
        "0.8.2",
        "0.8.3",
        "0.8.4",
        "0.8.5",
        "0.8.6",
        "0.8.7",
        "0.8.8",
        "0.8.9",
        "0.9.0",
        "0.9.0b0",
        "0.9.0b1",
        "1.0.0",
        "1.0.1",
        "1.0.2",
        "1.0a1",
        "1.0a2",
        "1.1.0",
        "1.2.0",
        "1.2.0b1",
        "1.2.0b2",
        "1.2.0b3",
        "1.2.1",
        "1.3.0",
        "1.3.0b0",
        "1.3.1",
        "1.4.0",
        "1.4.1",
        "1.4.2",
        "1.4.3",
        "1.4.4",
        "2.0.0",
        "2.0.0b0",
        "2.0.0b1",
        "2.1.0",
        "2.1.0b0"
      ]
    }
  ],
  "aliases": [
    "CVE-2022-24761",
    "GHSA-4f7p-27jc-3c36"
  ],
  "details": "Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using Waitress versions 2.1.0 and prior behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends. This would allow requests to be smuggled via the front-end proxy to waitress and later behavior. There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory: The use of Python\u0027s `int()` to parse strings into integers, leading to `+10` to be parsed as `10`, or `0x01` to be parsed as `1`, where as the standard specifies that the string should contain only digits or hex digits; and Waitress does not support chunk extensions, however it was discarding them without validating that they did not contain illegal characters. This vulnerability has been patched in Waitress 2.1.1. A workaround is available. When deploying a proxy in front of waitress, turning on any and all functionality to make sure that the request matches the RFC7230 standard. Certain proxy servers may not have this functionality though and users are encouraged to upgrade to the latest version of waitress instead.",
  "id": "PYSEC-2022-169",
  "modified": "2022-03-28T18:41:52.426676Z",
  "published": "2022-03-17T13:15:00Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/Pylons/waitress/commit/9e0b8c801e4d505c2ffc91b891af4ba48af715e0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Pylons/waitress/releases/tag/v2.1.1"
    }
  ]
}

cve-2022-24761

Vulnerability from cvelistv5

Published

2022-03-17 12:40

Modified

2024-08-03 04:20

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Summary

HTTP Request Smuggling in waitress

References

▼	URL	Tags
	https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36	x_refsource_CONFIRM
	https://github.com/Pylons/waitress/commit/9e0b8c801e4d505c2ffc91b891af4ba48af715e0	x_refsource_MISC
	https://github.com/Pylons/waitress/releases/tag/v2.1.1	x_refsource_MISC
	https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html	mailing-list, x_refsource_MLIST
	https://www.debian.org/security/2022/dsa-5138	vendor-advisory, x_refsource_DEBIAN

Impacted products

Vendor

Product

Version

▼

Pylons

waitress

Version: < 2.1.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T04:20:50.428Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        },
        "references": [
          {
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              "x_transferred"
            ],
            "url": "https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/Pylons/waitress/commit/9e0b8c801e4d505c2ffc91b891af4ba48af715e0"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/Pylons/waitress/releases/tag/v2.1.1"
          },
          {
            "name": "[debian-lts-announce] 20220512 [SECURITY] [DLA 3000-1] waitress security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
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            "url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html"
          },
          {
            "name": "DSA-5138",
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              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5138"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "waitress",
          "vendor": "Pylons",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.1.1"
            }
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using Waitress versions 2.1.0 and prior behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends. This would allow requests to be smuggled via the front-end proxy to waitress and later behavior. There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory: The use of Python\u0027s `int()` to parse strings into integers, leading to `+10` to be parsed as `10`, or `0x01` to be parsed as `1`, where as the standard specifies that the string should contain only digits or hex digits; and Waitress does not support chunk extensions, however it was discarding them without validating that they did not contain illegal characters. This vulnerability has been patched in Waitress 2.1.1. A workaround is available. When deploying a proxy in front of waitress, turning on any and all functionality to make sure that the request matches the RFC7230 standard. Certain proxy servers may not have this functionality though and users are encouraged to upgrade to the latest version of waitress instead."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          }
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              "lang": "en",
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      ],
      "providerMetadata": {
        "dateUpdated": "2022-05-18T14:06:11",
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      },
      "references": [
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        },
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          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Pylons/waitress/commit/9e0b8c801e4d505c2ffc91b891af4ba48af715e0"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Pylons/waitress/releases/tag/v2.1.1"
        },
        {
          "name": "[debian-lts-announce] 20220512 [SECURITY] [DLA 3000-1] waitress security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html"
        },
        {
          "name": "DSA-5138",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2022/dsa-5138"
        }
      ],
      "source": {
        "advisory": "GHSA-4f7p-27jc-3c36",
        "discovery": "UNKNOWN"
      },
      "title": "HTTP Request Smuggling in waitress",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2022-24761",
          "STATE": "PUBLIC",
          "TITLE": "HTTP Request Smuggling in waitress"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "waitress",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003c 2.1.1"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Pylons"
              }
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          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using Waitress versions 2.1.0 and prior behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends. This would allow requests to be smuggled via the front-end proxy to waitress and later behavior. There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory: The use of Python\u0027s `int()` to parse strings into integers, leading to `+10` to be parsed as `10`, or `0x01` to be parsed as `1`, where as the standard specifies that the string should contain only digits or hex digits; and Waitress does not support chunk extensions, however it was discarding them without validating that they did not contain illegal characters. This vulnerability has been patched in Waitress 2.1.1. A workaround is available. When deploying a proxy in front of waitress, turning on any and all functionality to make sure that the request matches the RFC7230 standard. Certain proxy servers may not have this functionality though and users are encouraged to upgrade to the latest version of waitress instead."
            }
          ]
        },
        "impact": {
          "cvss": {
            "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"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request Smuggling\u0027)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36",
              "refsource": "CONFIRM",
              "url": "https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36"
            },
            {
              "name": "https://github.com/Pylons/waitress/commit/9e0b8c801e4d505c2ffc91b891af4ba48af715e0",
              "refsource": "MISC",
              "url": "https://github.com/Pylons/waitress/commit/9e0b8c801e4d505c2ffc91b891af4ba48af715e0"
            },
            {
              "name": "https://github.com/Pylons/waitress/releases/tag/v2.1.1",
              "refsource": "MISC",
              "url": "https://github.com/Pylons/waitress/releases/tag/v2.1.1"
            },
            {
              "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"
            },
            {
              "name": "DSA-5138",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2022/dsa-5138"
            }
          ]
        },
        "source": {
          "advisory": "GHSA-4f7p-27jc-3c36",
          "discovery": "UNKNOWN"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2022-24761",
    "datePublished": "2022-03-17T12:40:10",
    "dateReserved": "2022-02-10T00:00:00",
    "dateUpdated": "2024-08-03T04:20:50.428Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

ghsa-4f7p-27jc-3c36

Vulnerability from github

Published

2022-03-18 19:00

Modified

2024-11-19 16:04

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Summary

HTTP Request Smuggling in waitress

Details

Impact

When using Waitress behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends.

This would allow requests to be smuggled via the front-end proxy to waitress and later behavior.

There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory:

The use of Python's int() to parse strings into integers, leading to +10 to be parsed as 10, or 0x01 to be parsed as 1, where as the standard specifies that the string should contain only digits or hex digits.
Waitress does not support chunk extensions, however it was discarding them without validating that they did not contain illegal characters

Patches

This has been fixed in Waitress 2.1.1

Workarounds

When deploying a proxy in front of waitress, turning on any and all functionality to make sure that the request matches the RFC7230 standard. Certain proxy servers may not have this functionality though and users are encouraged to upgrade to the latest version of waitress instead.

References

https://portswigger.net/research/http-desync-attacks-request-smuggling-reborn

For more information

If you have any questions or comments about this advisory: * Open an issue in the Github issue tracker (if not security related/sensitive) * Email us at pylons-project-security@googlegroups.com (If security related or sensitive)

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "waitress"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-24761"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-444"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-03-18T19:00:59Z",
    "nvd_published_at": "2022-03-17T13:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nWhen using Waitress behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends.\n\nThis would allow requests to be smuggled via the front-end proxy to waitress and later behavior.\n\nThere are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory:\n\n- The use of Python\u0027s `int()` to parse strings into integers, leading to `+10` to be parsed as `10`, or `0x01` to be parsed as `1`, where as the standard specifies that the string should contain only digits or hex digits.\n- Waitress does not support chunk extensions, however it was discarding them without validating that they did not contain illegal characters\n\n### Patches\n\nThis has been fixed in Waitress 2.1.1\n\n### Workarounds\n\nWhen deploying a proxy in front of waitress, turning on any and all functionality to make sure that the request matches the RFC7230 standard. Certain proxy servers may not have this functionality though and users are encouraged to upgrade to the latest version of waitress instead.\n\n### References\n\n- https://portswigger.net/research/http-desync-attacks-request-smuggling-reborn\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n* Open an issue in [the Github issue tracker](https://github.com/Pylons/waitress/issues) (if not security related/sensitive)\n* Email us at [pylons-project-security@googlegroups.com](mailto:pylons-project-security@googlegroups.com) (If security related or sensitive)\n",
  "id": "GHSA-4f7p-27jc-3c36",
  "modified": "2024-11-19T16:04:18Z",
  "published": "2022-03-18T19:00:59Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-24761"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Pylons/waitress/commit/9e0b8c801e4d505c2ffc91b891af4ba48af715e0"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Pylons/waitress"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Pylons/waitress/releases/tag/v2.1.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/waitress/PYSEC-2022-169.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00011.html"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2022/dsa-5138"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "HTTP Request Smuggling in waitress"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted

pysec-2022-169

Vulnerability from pysec

cve-2022-24761

Vulnerability from cvelistv5

ghsa-4f7p-27jc-3c36

Vulnerability from github

Impact

Patches

Workarounds

References

For more information

Tags

Sightings

Nomenclature