rhsa-2020_0720
Vulnerability from csaf_redhat
Published
2020-03-05 12:02
Modified
2024-11-13 22:11
Summary
Red Hat Security Advisory: python-waitress security update

Notes

Topic
An update for python-waitress is now available for Red Hat OpenStack Platform 15 (Stein). Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
Waitress is a pure Python WSGI server which supports HTTP/1.0 and HTTP/1.1. Security Fix(es): * HTTP request smuggling through LF vs CRLF handling (CVE-2019-16785) * HTTP request smuggling through invalid Transfer-Encoding (CVE-2019-16786) * HTTP Request Smuggling through Invalid whitespace characters in headers (CVE-2019-16789) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page listed in the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


To clipboard 

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        "text": "An update for python-waitress is now available for Red Hat OpenStack\nPlatform 15 (Stein).\n\nRed Hat Product Security has rated this update as having a security impact\nof Low. A Common Vulnerability Scoring System (CVSS) base score,\nwhich gives a detailed severity rating, is available for each vulnerability\nfrom the CVE link(s) in the References section.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "Waitress is a pure Python WSGI server which supports HTTP/1.0 and HTTP/1.1.\n\nSecurity Fix(es):\n\n* HTTP request smuggling through LF vs CRLF handling (CVE-2019-16785)\n\n* HTTP request smuggling through invalid Transfer-Encoding (CVE-2019-16786)\n\n* HTTP Request Smuggling through Invalid whitespace characters in headers\n(CVE-2019-16789)\n\nFor more details about the security issue(s), including the impact, a CVSS\nscore, acknowledgments, and other related information, refer to the CVE\npage listed in the References section.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
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    "title": "Red Hat Security Advisory: python-waitress security update",
    "tracking": {
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  "vulnerabilities": [
    {
      "cve": "CVE-2019-16785",
      "cwe": {
        "id": "CWE-444",
        "name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
      },
      "discovery_date": "2020-01-15T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "1791420"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "An HTTP-request vulnerability was discovered in Waitress which 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 process header fields with an LF the same way as it processes those with a CRLF, it can lead to the front-end and the back-end server processing the same HTTP message in two different ways. This vulnerability can lead to a potential for HTTP request smuggling and splitting where Waitress may see two requests, while the front-end server only sees a single HTTP message.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "waitress: HTTP request smuggling through LF vs CRLF handling",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "All affected Red Hat products ship but do not use the flawed version of python-waitress. The impact for these products is therefore rated as having a security impact of Low.\n\nIn Red Hat OpenStack Platform 13,  because the flawed code is not used and the fix would require a substantial amount of development, no update will be provided at this time for the RHOSP13 python-waitress package.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "8Base-RHOS-15.0:python-waitress-0:1.4.2-1.el8ost.src",
          "8Base-RHOS-15.0:python3-waitress-0:1.4.2-1.el8ost.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2019-16785"
        },
        {
          "category": "external",
          "summary": "RHBZ#1791420",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1791420"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2019-16785",
          "url": "https://www.cve.org/CVERecord?id=CVE-2019-16785"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-16785",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-16785"
        },
        {
          "category": "external",
          "summary": "https://docs.pylonsproject.org/projects/waitress/en/latest/#id6",
          "url": "https://docs.pylonsproject.org/projects/waitress/en/latest/#id6"
        }
      ],
      "release_date": "2019-12-20T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2020-03-05T12:02:14+00:00",
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          "product_ids": [
            "8Base-RHOS-15.0:python-waitress-0:1.4.2-1.el8ost.src",
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          ],
          "restart_required": {
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          },
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        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "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"
          },
          "products": [
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "waitress: HTTP request smuggling through LF vs CRLF handling"
    },
    {
      "cve": "CVE-2019-16786",
      "cwe": {
        "id": "CWE-444",
        "name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
      },
      "discovery_date": "2020-01-15T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1791415"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "An HTTP-interpretation flaw was found in waitress which did not properly validate incoming HTTP headers. When parsing the Transfer-Encoding header, waitress would look only for a single string value. According to the HTTP standard, Transfer-Encoding should be a comma-separated list, with the inner-most encoding first, followed by any further transfer codings, ending with \u0027chunked\u0027. Because of this flaw, requests sent with: \"Transfer-Encoding: gzip, chunked\" would get ignored, and waitress would use the Content-Length header instead to determine the body size of the HTTP message. A remote attacker could exploit this flaw to force waitress to accept potentially bad HTTP requests or treat a single request as multiple requests in the case of HTTP pipelining.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "waitress: HTTP request smuggling through invalid Transfer-Encoding",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "All affected Red Hat products ship but do not use the flawed version of python-waitress. The impact for these products is therefore rated as having a security impact of Low.\n\nIn Red Hat OpenStack Platform 13,  because the flawed code is not used and the fix would require a substantial amount of development, no update will be provided at this time for the RHOSP13 python-waitress package.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "8Base-RHOS-15.0:python-waitress-0:1.4.2-1.el8ost.src",
          "8Base-RHOS-15.0:python3-waitress-0:1.4.2-1.el8ost.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2019-16786"
        },
        {
          "category": "external",
          "summary": "RHBZ#1791415",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1791415"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2019-16786",
          "url": "https://www.cve.org/CVERecord?id=CVE-2019-16786"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-16786",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-16786"
        },
        {
          "category": "external",
          "summary": "https://docs.pylonsproject.org/projects/waitress/en/latest/#id6",
          "url": "https://docs.pylonsproject.org/projects/waitress/en/latest/#id6"
        }
      ],
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      "remediations": [
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          "date": "2020-03-05T12:02:14+00:00",
          "details": "For details on how to apply this update, which includes the changes\ndescribed in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2020:0720"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "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"
          },
          "products": [
            "8Base-RHOS-15.0:python-waitress-0:1.4.2-1.el8ost.src",
            "8Base-RHOS-15.0:python3-waitress-0:1.4.2-1.el8ost.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "waitress: HTTP request smuggling through invalid Transfer-Encoding"
    },
    {
      "cve": "CVE-2019-16789",
      "cwe": {
        "id": "CWE-444",
        "name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
      },
      "discovery_date": "2019-12-26T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1789807"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "An HTTP-interpretation flaw was found in waitress, through version 1.4.0. If a proxy server is used in front of waitress, an invalid request may be sent by an attacker that bypasses the front-end and is parsed differently by waitress leading to a potential for HTTP request smuggling. Specially crafted requests containing special whitespace characters in the Transfer-Encoding header would get parsed by waitress as being a chunked request, but a front-end server would use the Content-Length instead as the Transfer-Encoding header is considered invalid due to containing invalid characters. If a front-end server does HTTP pipelining to a backend Waitress server, an HTTP request splitting could occur which may lead to potential cache poisoning or unexpected information disclosure. This issue is fixed in Waitress 1.4.1 through more strict HTTP field validation. The highest threat from this vulnerability is data integrity.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "waitress: HTTP Request Smuggling through Invalid whitespace characters in headers",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "All affected Red Hat products ship but do not use the flawed version of python-waitress. The impact for these products is therefore rated as having a security impact of Low.\n\nFor Red Hat OpenStack Platform 13,  because the flaw has a lower impact and  the fix would require a substantial amount of development, no update will be provided at this time for the RHOSP13 python-waitress package.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "8Base-RHOS-15.0:python-waitress-0:1.4.2-1.el8ost.src",
          "8Base-RHOS-15.0:python3-waitress-0:1.4.2-1.el8ost.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2019-16789"
        },
        {
          "category": "external",
          "summary": "RHBZ#1789807",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1789807"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2019-16789",
          "url": "https://www.cve.org/CVERecord?id=CVE-2019-16789"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-16789",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-16789"
        },
        {
          "category": "external",
          "summary": "https://docs.pylonsproject.org/projects/waitress/en/latest/#id2",
          "url": "https://docs.pylonsproject.org/projects/waitress/en/latest/#id2"
        }
      ],
      "release_date": "2019-12-26T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2020-03-05T12:02:14+00:00",
          "details": "For details on how to apply this update, which includes the changes\ndescribed in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "8Base-RHOS-15.0:python-waitress-0:1.4.2-1.el8ost.src",
            "8Base-RHOS-15.0:python3-waitress-0:1.4.2-1.el8ost.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2020:0720"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "8Base-RHOS-15.0:python-waitress-0:1.4.2-1.el8ost.src",
            "8Base-RHOS-15.0:python3-waitress-0:1.4.2-1.el8ost.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "waitress: HTTP Request Smuggling through Invalid whitespace characters in headers"
    }
  ]
}


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