gsd-2021-32778
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions envoy’s procedure for resetting a HTTP/2 stream has O(N^2) complexity, leading to high CPU utilization when a large number of streams are reset. Deployments are susceptible to Denial of Service when Envoy is configured with high limit on H/2 concurrent streams. An attacker wishing to exploit this vulnerability would require a client opening and closing a large number of H/2 streams. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to reduce time complexity of resetting HTTP/2 streams. As a workaround users may limit the number of simultaneous HTTP/2 dreams for upstream and downstream peers to a low number, i.e. 100.
Aliases
Aliases
{ GSD: { alias: "CVE-2021-32778", description: "Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions envoy’s procedure for resetting a HTTP/2 stream has O(N^2) complexity, leading to high CPU utilization when a large number of streams are reset. Deployments are susceptible to Denial of Service when Envoy is configured with high limit on H/2 concurrent streams. An attacker wishing to exploit this vulnerability would require a client opening and closing a large number of H/2 streams. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to reduce time complexity of resetting HTTP/2 streams. As a workaround users may limit the number of simultaneous HTTP/2 dreams for upstream and downstream peers to a low number, i.e. 100.", id: "GSD-2021-32778", references: [ "https://www.suse.com/security/cve/CVE-2021-32778.html", "https://access.redhat.com/errata/RHEA-2021:4051", "https://security.archlinux.org/CVE-2021-32778", "https://linux.oracle.com/cve/CVE-2021-32778.html", ], }, gsd: { metadata: { exploitCode: "unknown", remediation: "unknown", reportConfidence: "confirmed", type: "vulnerability", }, osvSchema: { aliases: [ "CVE-2021-32778", ], details: "Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions envoy’s procedure for resetting a HTTP/2 stream has O(N^2) complexity, leading to high CPU utilization when a large number of streams are reset. Deployments are susceptible to Denial of Service when Envoy is configured with high limit on H/2 concurrent streams. An attacker wishing to exploit this vulnerability would require a client opening and closing a large number of H/2 streams. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to reduce time complexity of resetting HTTP/2 streams. As a workaround users may limit the number of simultaneous HTTP/2 dreams for upstream and downstream peers to a low number, i.e. 100.", id: "GSD-2021-32778", modified: "2023-12-13T01:23:09.147824Z", schema_version: "1.4.0", }, }, namespaces: { "cve.org": { CVE_data_meta: { ASSIGNER: "security-advisories@github.com", ID: "CVE-2021-32778", STATE: "PUBLIC", TITLE: "Excessive CPU utilization when closing HTTP/2 streams", }, 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", }, { version_value: ">= 1.17.0, < 1.17.4", }, { version_value: ">= 1.16.0, < 1.16.5", }, ], }, }, ], }, 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’s procedure for resetting a HTTP/2 stream has O(N^2) complexity, leading to high CPU utilization when a large number of streams are reset. Deployments are susceptible to Denial of Service when Envoy is configured with high limit on H/2 concurrent streams. An attacker wishing to exploit this vulnerability would require a client opening and closing a large number of H/2 streams. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to reduce time complexity of resetting HTTP/2 streams. As a workaround users may limit the number of simultaneous HTTP/2 dreams for upstream and downstream peers to a low number, i.e. 100.", }, ], }, impact: { cvss: { attackComplexity: "LOW", attackVector: "NETWORK", availabilityImpact: "LOW", baseScore: 5.8, baseSeverity: "MEDIUM", 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:L", version: "3.1", }, }, problemtype: { problemtype_data: [ { description: [ { lang: "eng", value: "CWE-834: Excessive Iteration", }, ], }, ], }, 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-3xh3-33v5-chcc", refsource: "CONFIRM", url: "https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc", }, ], }, source: { advisory: "GHSA-3xh3-33v5-chcc", discovery: "UNKNOWN", }, }, "nvd.nist.gov": { configurations: { CVE_data_version: "4.0", nodes: [ { children: [], cpe_match: [ { cpe23Uri: "cpe:2.3:a:envoyproxy:envoy:1.19.0:*:*:*:*:*:*:*", cpe_name: [], vulnerable: true, }, { cpe23Uri: "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", cpe_name: [], versionEndExcluding: "1.16.5", versionStartIncluding: "1.16.0", vulnerable: true, }, { cpe23Uri: "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", cpe_name: [], versionEndExcluding: "1.17.4", versionStartIncluding: "1.17.0", vulnerable: true, }, { cpe23Uri: "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", cpe_name: [], versionEndExcluding: "1.18.4", versionStartIncluding: "1.18.0", vulnerable: true, }, ], operator: "OR", }, ], }, cve: { CVE_data_meta: { ASSIGNER: "security-advisories@github.com", ID: "CVE-2021-32778", }, data_format: "MITRE", data_type: "CVE", data_version: "4.0", description: { description_data: [ { lang: "en", value: "Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions envoy’s procedure for resetting a HTTP/2 stream has O(N^2) complexity, leading to high CPU utilization when a large number of streams are reset. Deployments are susceptible to Denial of Service when Envoy is configured with high limit on H/2 concurrent streams. An attacker wishing to exploit this vulnerability would require a client opening and closing a large number of H/2 streams. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to reduce time complexity of resetting HTTP/2 streams. As a workaround users may limit the number of simultaneous HTTP/2 dreams for upstream and downstream peers to a low number, i.e. 100.", }, ], }, problemtype: { problemtype_data: [ { description: [ { lang: "en", value: "CWE-834", }, ], }, ], }, references: { reference_data: [ { name: "https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history", refsource: "MISC", tags: [ "Release Notes", "Vendor Advisory", ], url: "https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history", }, { name: "https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc", refsource: "CONFIRM", tags: [ "Third Party Advisory", ], url: "https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc", }, ], }, }, 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, }, baseMetricV3: { cvssV3: { 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, }, }, lastModifiedDate: "2022-06-15T15:49Z", publishedDate: "2021-08-24T21:15Z", }, }, }
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Sightings
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Nomenclature
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