CVE-2021-32780
Vulnerability from cvelistv5
Published
2021-08-24 20:55
Modified
2024-08-03 23:33
Severity ?
8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS score ?
0.08% (0.23873)
Summary
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions Envoy transitions a H/2 connection to the CLOSED state when it receives a GOAWAY frame without any streams outstanding. The connection state is transitioned to DRAINING when it receives a SETTING frame with the SETTINGS_MAX_CONCURRENT_STREAMS parameter set to 0. Receiving these two frames in the same I/O event results in abnormal termination of the Envoy process due to invalid state transition from CLOSED to DRAINING. A sequence of H/2 frames delivered by an untrusted upstream server will result in Denial of Service in the presence of untrusted **upstream** servers. Envoy versions 1.19.1, 1.18.4 contain fixes to stop processing of pending H/2 frames after connection transition to the CLOSED state.
References
security-advisories@github.comhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8Third Party Advisory
security-advisories@github.comhttps://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_historyVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_historyVendor Advisory
Impacted products
Vendor Product Version
envoyproxy envoy Version: >= 1.19.0, < 1.19.1
Version: >= 1.18.0, < 1.18.4
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
   containers: {
      adp: [
         {
            providerMetadata: {
               dateUpdated: "2024-08-03T23:33:56.068Z",
               orgId: "af854a3a-2127-422b-91ae-364da2661108",
               shortName: "CVE",
            },
            references: [
               {
                  tags: [
                     "x_refsource_MISC",
                     "x_transferred",
                  ],
                  url: "https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history",
               },
               {
                  tags: [
                     "x_refsource_CONFIRM",
                     "x_transferred",
                  ],
                  url: "https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8",
               },
            ],
            title: "CVE Program Container",
         },
      ],
      cna: {
         affected: [
            {
               product: "envoy",
               vendor: "envoyproxy",
               versions: [
                  {
                     status: "affected",
                     version: ">= 1.19.0, < 1.19.1",
                  },
                  {
                     status: "affected",
                     version: ">= 1.18.0, < 1.18.4",
                  },
               ],
            },
         ],
         descriptions: [
            {
               lang: "en",
               value: "Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions Envoy transitions a H/2 connection to the CLOSED state when it receives a GOAWAY frame without any streams outstanding. The connection state is transitioned to DRAINING when it receives a SETTING frame with the SETTINGS_MAX_CONCURRENT_STREAMS parameter set to 0. Receiving these two frames in the same I/O event results in abnormal termination of the Envoy process due to invalid state transition from CLOSED to DRAINING. A sequence of H/2 frames delivered by an untrusted upstream server will result in Denial of Service in the presence of untrusted **upstream** servers. Envoy versions 1.19.1, 1.18.4 contain fixes to stop processing of pending H/2 frames after connection transition to the CLOSED state.",
            },
         ],
         metrics: [
            {
               cvssV3_1: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 8.6,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "NONE",
                  scope: "CHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
                  version: "3.1",
               },
            },
         ],
         problemTypes: [
            {
               descriptions: [
                  {
                     cweId: "CWE-754",
                     description: "CWE-754: Improper Check for Unusual or Exceptional Conditions",
                     lang: "en",
                     type: "CWE",
                  },
               ],
            },
         ],
         providerMetadata: {
            dateUpdated: "2021-08-24T20:55:10",
            orgId: "a0819718-46f1-4df5-94e2-005712e83aaa",
            shortName: "GitHub_M",
         },
         references: [
            {
               tags: [
                  "x_refsource_MISC",
               ],
               url: "https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history",
            },
            {
               tags: [
                  "x_refsource_CONFIRM",
               ],
               url: "https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8",
            },
         ],
         source: {
            advisory: "GHSA-j374-mjrw-vvp8",
            discovery: "UNKNOWN",
         },
         title: "Incorrect handling of H/2 GOAWAY followed by SETTINGS frames",
         x_legacyV4Record: {
            CVE_data_meta: {
               ASSIGNER: "security-advisories@github.com",
               ID: "CVE-2021-32780",
               STATE: "PUBLIC",
               TITLE: "Incorrect handling of H/2 GOAWAY followed by SETTINGS frames",
            },
            affects: {
               vendor: {
                  vendor_data: [
                     {
                        product: {
                           product_data: [
                              {
                                 product_name: "envoy",
                                 version: {
                                    version_data: [
                                       {
                                          version_value: ">= 1.19.0, < 1.19.1",
                                       },
                                       {
                                          version_value: ">= 1.18.0, < 1.18.4",
                                       },
                                    ],
                                 },
                              },
                           ],
                        },
                        vendor_name: "envoyproxy",
                     },
                  ],
               },
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "eng",
                     value: "Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions Envoy transitions a H/2 connection to the CLOSED state when it receives a GOAWAY frame without any streams outstanding. The connection state is transitioned to DRAINING when it receives a SETTING frame with the SETTINGS_MAX_CONCURRENT_STREAMS parameter set to 0. Receiving these two frames in the same I/O event results in abnormal termination of the Envoy process due to invalid state transition from CLOSED to DRAINING. A sequence of H/2 frames delivered by an untrusted upstream server will result in Denial of Service in the presence of untrusted **upstream** servers. Envoy versions 1.19.1, 1.18.4 contain fixes to stop processing of pending H/2 frames after connection transition to the CLOSED state.",
                  },
               ],
            },
            impact: {
               cvss: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 8.6,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "NONE",
                  scope: "CHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
                  version: "3.1",
               },
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "eng",
                           value: "CWE-754: Improper Check for Unusual or Exceptional Conditions",
                        },
                     ],
                  },
               ],
            },
            references: {
               reference_data: [
                  {
                     name: "https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history",
                     refsource: "MISC",
                     url: "https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history",
                  },
                  {
                     name: "https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8",
                     refsource: "CONFIRM",
                     url: "https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8",
                  },
               ],
            },
            source: {
               advisory: "GHSA-j374-mjrw-vvp8",
               discovery: "UNKNOWN",
            },
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "a0819718-46f1-4df5-94e2-005712e83aaa",
      assignerShortName: "GitHub_M",
      cveId: "CVE-2021-32780",
      datePublished: "2021-08-24T20:55:10",
      dateReserved: "2021-05-12T00:00:00",
      dateUpdated: "2024-08-03T23:33:56.068Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2021-32780\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2021-08-24T21:15:09.947\",\"lastModified\":\"2024-11-21T06:07:43.583\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions Envoy transitions a H/2 connection to the CLOSED state when it receives a GOAWAY frame without any streams outstanding. The connection state is transitioned to DRAINING when it receives a SETTING frame with the SETTINGS_MAX_CONCURRENT_STREAMS parameter set to 0. Receiving these two frames in the same I/O event results in abnormal termination of the Envoy process due to invalid state transition from CLOSED to DRAINING. A sequence of H/2 frames delivered by an untrusted upstream server will result in Denial of Service in the presence of untrusted **upstream** servers. Envoy versions 1.19.1, 1.18.4 contain fixes to stop processing of pending H/2 frames after connection transition to the CLOSED state.\"},{\"lang\":\"es\",\"value\":\"Envoy es un proxy L7 de código abierto y un bus de comunicación diseñado para grandes arquitecturas modernas orientadas a servicios. En las versiones afectadas, Envoy lleva a cabo una transición de una conexión H/2 al estado CLOSED cuando recibe una trama GOAWAY sin ningún flujo pendiente. El estado de la conexión pasa a DRAINING cuando recibe una trama SETTING con el parámetro SETTINGS_MAX_CONCURRENT_STREAMS ajustado a 0. Recibiendo estas dos tramas en el mismo evento de E/S resulta en una terminación anormal del proceso Envoy debido a una transición de estado no válida de CLOSED a DRAINING. Una secuencia de tramas H/2 entregada por un servidor upstream no confiable resultará en una Denegación de Servicio en presencia de servidores **upstream** no confiables. Envoy versiones 1.19.1 y 1.18.4, contienen correcciones para detener el procesamiento de las tramas H/2 pendientes después de la transición de la conexión al estado CLOSED.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\",\"baseScore\":8.6,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":4.0},{\"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}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:P\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-754\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-754\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.18.0\",\"versionEndExcluding\":\"1.18.4\",\"matchCriteriaId\":\"D7376E28-9915-4CA1-A5DB-40874D10E781\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:envoyproxy:envoy:1.19.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"1968AA35-60E2-4A00-84A0-617738B55D33\"}]}]}],\"references\":[{\"url\":\"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
   },
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.