CVE-2019-9511 (GCVE-0-2019-9511)

Vulnerability from cvelistv5 – Published: 2019-08-13 20:50 – Updated: 2024-08-04 21:54
VLAI
Title
Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service
Summary
Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.
Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
URL Tags
https://kb.cert.org/vuls/id/605641/ third-party-advisoryx_refsource_CERT-VN
https://usn.ubuntu.com/4099-1/ vendor-advisoryx_refsource_UBUNTU
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://seclists.org/bugtraq/2019/Aug/40 mailing-listx_refsource_BUGTRAQ
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://www.debian.org/security/2019/dsa-4505 vendor-advisoryx_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://seclists.org/bugtraq/2019/Sep/1 mailing-listx_refsource_BUGTRAQ
https://www.debian.org/security/2019/dsa-4511 vendor-advisoryx_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://access.redhat.com/errata/RHSA-2019:2692 vendor-advisoryx_refsource_REDHAT
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://access.redhat.com/errata/RHSA-2019:2745 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2746 vendor-advisoryx_refsource_REDHAT
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https://access.redhat.com/errata/RHSA-2019:2949 vendor-advisoryx_refsource_REDHAT
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://access.redhat.com/errata/RHSA-2019:2955 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2966 vendor-advisoryx_refsource_REDHAT
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://access.redhat.com/errata/RHSA-2019:3041 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3933 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3935 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3932 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:4018 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:4019 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:4021 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:4020 vendor-advisoryx_refsource_REDHAT
https://www.debian.org/security/2020/dsa-4669 vendor-advisoryx_refsource_DEBIAN
https://www.oracle.com/technetwork/security-advis… x_refsource_MISC
https://www.oracle.com/security-alerts/cpuoct2020.html x_refsource_MISC
https://github.com/Netflix/security-bulletins/blo… x_refsource_MISC
https://www.synology.com/security/advisory/Synolo… x_refsource_CONFIRM
https://support.f5.com/csp/article/K02591030 x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2019082… x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2019082… x_refsource_CONFIRM
https://kc.mcafee.com/corporate/index?page=conten… x_refsource_CONFIRM
https://support.f5.com/csp/article/K02591030?utm_… x_refsource_CONFIRM
https://www.oracle.com/security-alerts/cpujan2021.html x_refsource_MISC
Credits
Thanks to Jonathan Looney of Netflix for reporting this vulnerability.
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            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
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            "userInteraction": "NONE",
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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-06-28T07:30:19+00:00",
      "cve": "CVE-2019-9511",
      "id": "CVE-2019-9511",
      "initial_release_date": "2019-08-13T00:00:00+00:00",
      "product_status:fixed": "1600",
      "product_status:known_affected": "8",
      "product_status:known_not_affected": "98",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "HTTP/2: large amount of data requests leads to denial of service",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-9511.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.