FKIE_CVE-2018-16844

Vulnerability from fkie_nvd - Published: 2018-11-07 14:29 - Updated: 2026-06-17 01:44
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the 'http2' option of the 'listen' directive is used in a configuration file.
References
secalert@redhat.comhttp://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.htmlThird Party Advisory
secalert@redhat.comhttp://mailman.nginx.org/pipermail/nginx-announce/2018/000220.htmlMailing List, Vendor Advisory
secalert@redhat.comhttp://seclists.org/fulldisclosure/2021/Sep/36Mailing List, Third Party Advisory
secalert@redhat.comhttp://www.securityfocus.com/bid/105868Third Party Advisory, VDB Entry
secalert@redhat.comhttp://www.securitytracker.com/id/1042038Third Party Advisory, VDB Entry
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2018:3680Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2018:3681Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16844Issue Tracking
secalert@redhat.comhttps://support.apple.com/kb/HT212818Third Party Advisory
secalert@redhat.comhttps://usn.ubuntu.com/3812-1/Third Party Advisory
secalert@redhat.comhttps://www.debian.org/security/2018/dsa-4335Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://mailman.nginx.org/pipermail/nginx-announce/2018/000220.htmlMailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2021/Sep/36Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/105868Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1042038Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:3680Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:3681Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16844Issue Tracking
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT212818Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3812-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2018/dsa-4335Third Party Advisory
Impacted products
Vendor Product Version
f5 nginx *
f5 nginx *
debian debian_linux 9.0
canonical ubuntu_linux 14.04
canonical ubuntu_linux 16.04
canonical ubuntu_linux 18.04
canonical ubuntu_linux 18.10
apple xcode *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "nginx",
          "vendor": "[UNKNOWN]",
          "versions": [
            {
              "status": "affected",
              "version": "1.15.6"
            },
            {
              "status": "affected",
              "version": "1.14.1"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the \u0027http2\u0027 option of the \u0027listen\u0027 directive is used in a configuration file."
    },
    {
      "lang": "es",
      "value": "nginx en versiones anteriores a la 1.15.6 y 1.14.1 tiene una vulnerabilidad en la implementaci\u00f3n de HTTP/2 que puede permitir el uso excesivo de CPU. Este problema afecta a nginx compilado con ngx_http_v2_module (no compilado por defecto) si la opci\u00f3n \"hppt2\" de la directiva \"listen\" se emplea en un archivo de configuraci\u00f3n."
    }
  ],
  "id": "CVE-2018-16844",
  "lastModified": "2026-06-17T01:44:53.563",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.8,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV31": [
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        "cvssData": {
          "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"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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    ]
  },
  "published": "2018-11-07T14:29:00.837",
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      "source": "secalert@redhat.com",
      "tags": [
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      ],
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    {
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}



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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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