gsd-2020-11080
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.
Aliases
Aliases
CVE-2020-11080


To clipboard 

{
   GSD: {
      alias: "CVE-2020-11080",
      description: "In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.",
      id: "GSD-2020-11080",
      references: [
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         "https://www.debian.org/security/2020/dsa-4696",
         "https://access.redhat.com/errata/RHSA-2020:3084",
         "https://access.redhat.com/errata/RHSA-2020:3042",
         "https://access.redhat.com/errata/RHSA-2020:2895",
         "https://access.redhat.com/errata/RHSA-2020:2852",
         "https://access.redhat.com/errata/RHSA-2020:2850",
         "https://access.redhat.com/errata/RHSA-2020:2849",
         "https://access.redhat.com/errata/RHSA-2020:2848",
         "https://access.redhat.com/errata/RHSA-2020:2847",
         "https://access.redhat.com/errata/RHSA-2020:2823",
         "https://access.redhat.com/errata/RHSA-2020:2784",
         "https://access.redhat.com/errata/RHSA-2020:2755",
         "https://access.redhat.com/errata/RHSA-2020:2646",
         "https://access.redhat.com/errata/RHSA-2020:2644",
         "https://access.redhat.com/errata/RHSA-2020:2524",
         "https://access.redhat.com/errata/RHSA-2020:2523",
         "https://advisories.mageia.org/CVE-2020-11080.html",
         "https://alas.aws.amazon.com/cve/html/CVE-2020-11080.html",
         "https://linux.oracle.com/cve/CVE-2020-11080.html",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
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         id: "GSD-2020-11080",
         modified: "2023-12-13T01:22:05.316413Z",
         schema_version: "1.4.0",
      },
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         impact: {
            baseMetricV2: {
               acInsufInfo: false,
               cvssV2: {
                  accessComplexity: "LOW",
                  accessVector: "NETWORK",
                  authentication: "NONE",
                  availabilityImpact: "PARTIAL",
                  baseScore: 5,
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  vectorString: "AV:N/AC:L/Au:N/C:N/I:N/A:P",
                  version: "2.0",
               },
               exploitabilityScore: 10,
               impactScore: 2.9,
               obtainAllPrivilege: false,
               obtainOtherPrivilege: false,
               obtainUserPrivilege: false,
               severity: "MEDIUM",
               userInteractionRequired: false,
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                  attackVector: "NETWORK",
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                  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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               exploitabilityScore: 3.9,
               impactScore: 3.6,
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         },
         lastModifiedDate: "2023-10-16T18:15Z",
         publishedDate: "2020-06-03T23:15Z",
      },
   },
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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