RHSA-2025:0201
Vulnerability from csaf_redhat
Published
2025-01-09 14:57
Modified
2025-01-09 18:16
Summary
Red Hat Security Advisory: Red Hat OpenStack Platform 16.2 (python-waitress) security update

Notes

Topic
An update for python-waitress is now available for Red Hat OpenStack Platform 16.2 (Train) for Red Hat Enterprise Linux (RHEL) 8.4. Red Hat Product Security has rated this update as having a security impact of Important. 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
Pure-python WSGI server Security Fix(es): * python-waitress: request processing race condition in HTTP pipelining with invalid first request (CVE-2024-49768) * Waitress has a denial of service leading to high CPU usage/resource exhaustion (CVE-2024-49769) 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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        "category": "summary",
        "text": "An update for python-waitress is now available for Red Hat OpenStack\nPlatform 16.2 (Train) for Red Hat Enterprise Linux (RHEL) 8.4.\n\nRed Hat Product Security has rated this update as having a security impact\nof Important. 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"
      },
      {
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        "text": "Pure-python WSGI server\n\nSecurity Fix(es):\n\n* python-waitress: request processing race condition in HTTP pipelining\nwith invalid first request (CVE-2024-49768)\n\n* Waitress has a denial of service leading to high CPU usage/resource\nexhaustion (CVE-2024-49769)\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"
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      "cwe": {
        "id": "CWE-444",
        "name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
      },
      "discovery_date": "2024-10-29T15:00:49.909509+00:00",
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          "text": "A flaw was found in the Waitress WSGI server for Python. A remote client can send a request that is exactly `recv_bytes`, which defaults to 8192 long, followed by a secondary request using HTTP pipelining. When request lookahead is disabled (default), Waitress won\u0027t read any more requests, and when the first request fails due to a parsing error, it simply closes the connection. \n\nHowever when request lookahead is enabled, it is possible to process and receive the first request, start sending the error message back to the client while we read the next request and queue it. This will allow the secondary request to be serviced by the worker thread while the connection should be closed.",
          "title": "Vulnerability description"
        },
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          "text": "waitress: python-waitress: request processing race condition in HTTP pipelining with invalid first request",
          "title": "Vulnerability summary"
        },
        {
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          "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"
        }
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2024-49768",
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        },
        {
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        {
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          "summary": "https://github.com/Pylons/waitress/commit/e4359018537af376cf24bd13616d861e2fb76f65",
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        },
        {
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          "summary": "https://github.com/Pylons/waitress/security/advisories/GHSA-9298-4cf8-g4wj",
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          },
          "url": "https://access.redhat.com/errata/RHSA-2025:0201"
        },
        {
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          "details": "Disable `channel_request_lookahead`. This feature is disabled (set to 0) by default.",
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          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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          ]
        }
      ],
      "threats": [
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          "details": "Important"
        }
      ],
      "title": "waitress: python-waitress: request processing race condition in HTTP pipelining with invalid first request"
    },
    {
      "cve": "CVE-2024-49769",
      "cwe": {
        "id": "CWE-772",
        "name": "Missing Release of Resource after Effective Lifetime"
      },
      "discovery_date": "2024-10-29T15:01:03.083390+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2322461"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Waitress WSGI server for Python. When a remote client closes the connection before waitress has had the opportunity to call `getpeername()`, waitress will incorrectly clean up the connection, leading to the main thread attempting to write to a socket that no longer exists, and that socket is not removed from the list of sockets to attempt to process. This leads to a busy-loop calling the write function. A remote attacker could exhaust the available sockets with very little resources required.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "waitress: Waitress has a denial of service leading to high CPU usage/resource exhaustion",
          "title": "Vulnerability summary"
        },
        {
          "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": {
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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2024-49769"
        },
        {
          "category": "external",
          "summary": "RHBZ#2322461",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2322461"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2024-49769",
          "url": "https://www.cve.org/CVERecord?id=CVE-2024-49769"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2024-49769",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-49769"
        },
        {
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          "summary": "https://github.com/Pylons/waitress/commit/1ae4e894c9f76543bee06584001583fc6fa8c95c",
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        {
          "category": "external",
          "summary": "https://github.com/Pylons/waitress/issues/418",
          "url": "https://github.com/Pylons/waitress/issues/418"
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          "summary": "https://github.com/Pylons/waitress/pull/435",
          "url": "https://github.com/Pylons/waitress/pull/435"
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        {
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          "summary": "https://github.com/Pylons/waitress/security/advisories/GHSA-3f84-rpwh-47g6",
          "url": "https://github.com/Pylons/waitress/security/advisories/GHSA-3f84-rpwh-47g6"
        }
      ],
      "release_date": "2024-10-29T14:18:40.951000+00:00",
      "remediations": [
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          "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-2025:0201"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
          "product_ids": [
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          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
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      "threats": [
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          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "waitress: Waitress has a denial of service leading to high CPU usage/resource exhaustion"
    }
  ]
}


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