CVE-2019-9515 (GCVE-0-2019-9515)

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 settings flood, potentially leading to a denial of service
Summary
Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service. The attacker sends a stream of SETTINGS frames to the peer. Since the RFC requires that the peer reply with one acknowledgement per SETTINGS frame, an empty SETTINGS frame is almost equivalent in behavior to a ping. 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://github.com/Netflix/security-bulletins/blo… x_refsource_MISC
https://lists.apache.org/thread.html/bde52309316a… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/392108390cef… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/ad3d01e76719… mailing-listx_refsource_MLIST
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/K50233772 x_refsource_CONFIRM
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://seclists.org/bugtraq/2019/Aug/43 mailing-listx_refsource_BUGTRAQ
https://www.debian.org/security/2019/dsa-4508 vendor-advisoryx_refsource_DEBIAN
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-2019:2766 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2796 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:2861 vendor-advisoryx_refsource_REDHAT
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/K50233772?utm_… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2019:3892 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://access.redhat.com/errata/RHSA-2019:4045 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:4042 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:4040 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:4041 vendor-advisoryx_refsource_REDHAT
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://usn.ubuntu.com/4308-1/ vendor-advisoryx_refsource_UBUNTU
Credits
Thanks to Jonathan Looney of Netflix for reporting this vulnerability.
Show details on NVD website
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service. The attacker sends a stream of SETTINGS frames to the peer. Since the RFC requires that the peer reply with one acknowledgement per SETTINGS frame, an empty SETTINGS frame is almost equivalent in behavior to a ping. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.\"}, {\"lang\": \"es\", \"value\": \"Algunas implementaciones de HTTP / 2 son vulnerables a una inundaci\\u00f3n de configuraciones, lo que puede conducir a una denegaci\\u00f3n de servicio. El atacante env\\u00eda una secuencia de marcos de CONFIGURACI\\u00d3N al par. Como el RFC requiere que el igual responda con un acuse de recibo por cuadro de CONFIGURACI\\u00d3N, un cuadro de CONFIGURACI\\u00d3N vac\\u00edo es casi equivalente en comportamiento a un ping. Dependiendo de cu\\u00e1n eficientemente se pongan en cola estos datos, esto puede consumir un exceso de CPU, memoria o ambos.\"}]",
      "id": "CVE-2019-9515",
      "lastModified": "2024-11-21T04:51:46.897",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}], \"cvssMetricV30\": [{\"source\": \"cret@cert.org\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.0\", \"vectorString\": \"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:N/C:N/I:N/A:C\", \"baseScore\": 7.8, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"COMPLETE\"}, \"baseSeverity\": \"HIGH\", \"exploitabilityScore\": 10.0, \"impactScore\": 6.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2019-08-13T21:15:12.520",
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      "sourceIdentifier": "cret@cert.org",
      "vulnStatus": "Modified",
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  }
}


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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.