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CVE-2019-9518 (GCVE-0-2019-9518)

Vulnerability from cvelistv5 – Published: 2019-08-13 20:50 – Updated: 2024-08-04 21:54
VLAI
Title
Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service
Summary
Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag. These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each frame disproportionate to attack bandwidth. This can consume excess CPU.
CWE
  • CWE-400 - Uncontrolled Resource Consumption
References
URL Tags
https://kb.cert.org/vuls/id/605641/ third-party-advisoryx_refsource_CERT-VN
https://github.com/Netflix/security-bulletins/blo… x_refsource_MISC
https://seclists.org/bugtraq/2019/Aug/24 mailing-listx_refsource_BUGTRAQ
http://seclists.org/fulldisclosure/2019/Aug/16 mailing-listx_refsource_FULLDISC
https://www.synology.com/security/advisory/Synolo… x_refsource_CONFIRM
https://support.f5.com/csp/article/K46011592 x_refsource_CONFIRM
https://lists.apache.org/thread.html/2653c5654557… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/091b518265bc… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/ff5b0821a698… mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2019082… x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://www.debian.org/security/2019/dsa-4520 vendor-advisoryx_refsource_DEBIAN
https://seclists.org/bugtraq/2019/Sep/18 mailing-listx_refsource_BUGTRAQ
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://kc.mcafee.com/corporate/index?page=conten… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2019:2925 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2939 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2955 vendor-advisoryx_refsource_REDHAT
https://support.f5.com/csp/article/K46011592?utm_… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2019:3892 vendor-advisoryx_refsource_REDHAT
https://lists.apache.org/thread.html/9317fd092b25… mailing-listx_refsource_MLIST
https://access.redhat.com/errata/RHSA-2019:4352 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2020:0727 vendor-advisoryx_refsource_REDHAT
https://lists.apache.org/thread.html/r99a625fb170… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rd31230d01fa… mailing-listx_refsource_MLIST
Show details on NVD website

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    "redhat_vex": {
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      "current_release_date": "2026-06-28T11:42:14+00:00",
      "cve": "CVE-2019-9518",
      "id": "CVE-2019-9518",
      "initial_release_date": "2019-08-13T17:00:00+00:00",
      "product_status:fixed": "295",
      "product_status:known_affected": "6",
      "product_status:known_not_affected": "110",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "HTTP/2: flood using empty frames results in excessive resource consumption",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-9518.json",
      "version": "3"
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      "aggregate_severity": "important",
      "current_release_date": "2026-09-15T02:36:00Z",
      "cve": "CVE-2019-9518",
      "id": "CVE-2019-9518",
      "initial_release_date": "2023-02-15T04:14:34Z",
      "product_status:known_affected": "196",
      "product_status:known_not_affected": "213",
      "product_status:recommended": "409",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2019-9518",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2019-9518.json",
      "version": "17"
    }
  }
}



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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.

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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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