{ "containers": { "cna": { "affected": [ { "product": "envoy", "vendor": "envoyproxy", "versions": [ { "status": "affected", "version": ">= 1.20.0, < 1.20.2" }, { "status": "affected", "version": ">= 1.19.0, < 1.19.3" }, { "status": "affected", "version": "< 1.18.6" }, { "status": "affected", "version": ">= 1.21.0, < 1.21.1" } ] } ], "descriptions": [ { "lang": "en", "value": "Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade." } ], "metrics": [ { "cvssV3_1": { "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" } } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-476", "description": "CWE-476: NULL Pointer Dereference", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "dateUpdated": "2022-02-22T22:15:10.000Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M" }, "references": [ { "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p" }, { "tags": [ "x_refsource_MISC" ], "url": "https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a" } ], "source": { "advisory": "GHSA-vj5m-rch8-5r2p", "discovery": "UNKNOWN" }, "title": "Null pointer dereference in envoy", "x_legacyV4Record": { "CVE_data_meta": { "ASSIGNER": "security-advisories@github.com", "ID": "CVE-2021-43824", "STATE": "PUBLIC", "TITLE": "Null pointer dereference in envoy" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "envoy", "version": { "version_data": [ { "version_value": ">= 1.20.0, < 1.20.2" }, { "version_value": ">= 1.19.0, < 1.19.3" }, { "version_value": "< 1.18.6" }, { "version_value": ">= 1.21.0, < 1.21.1" } ] } } ] }, "vendor_name": "envoyproxy" } ] } }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade." } ] }, "impact": { "cvss": { "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" } }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "CWE-476: NULL Pointer Dereference" } ] } ] }, "references": { "reference_data": [ { "name": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p", "refsource": "CONFIRM", "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p" }, { "name": "https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a", "refsource": "MISC", "url": "https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a" } ] }, "source": { "advisory": "GHSA-vj5m-rch8-5r2p", "discovery": "UNKNOWN" } } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T04:03:09.023Z" }, "title": "CVE Program Container", "references": [ { "tags": [ "x_refsource_CONFIRM", "x_transferred" ], "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a" } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2025-04-23T15:57:27.390383Z", "id": "CVE-2021-43824", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-23T19:01:55.018Z" } } ] }, "cveMetadata": { "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2021-43824", "datePublished": "2022-02-22T22:15:10.000Z", "dateReserved": "2021-11-16T00:00:00.000Z", "dateUpdated": "2025-04-23T19:01:55.018Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1" }