{"id":"CVE-2021-32640","state":"PUBLISHED","title":"ReDoS in Sec-Websocket-Protocol header","description":"ws is an open source WebSocket client and server library for Node.js. A specially crafted value of the `Sec-Websocket-Protocol` header can be used to significantly slow down a ws server. The vulnerability has been fixed in ws@7.4.6 (https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff). In vulnerable versions of ws, the issue can be mitigated by reducing the maximum allowed length of the request headers using the [`--max-http-header-size=size`](https://nodejs.org/api/cli.html#cli_max_http_header_size_size) and/or the [`maxHeaderSize`](https://nodejs.org/api/http.html#http_http_createserver_options_requestlistener) options.","publishedAt":"2021-05-25T18:25:09.000Z","updatedAt":"2024-08-03T23:25:31.019Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["websockets ws"],"affected":[{"vendor":"websockets","product":"ws","versions":[{"version":">= 5.0.0 <= 7.4.5","status":"affected"}]}],"references":["https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693","https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff","https://lists.apache.org/thread.html/rdfa7b6253c4d6271e31566ecd5f30b7ce1b8fb2c89d52b8c4e0f4e30%40%3Ccommits.tinkerpop.apache.org%3E","https://security.netapp.com/advisory/ntap-20210706-0005/"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T19:48:33.225Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/32xxx/CVE-2021-32640.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-32640","state":"PUBLISHED","datePublished":"2021-05-25T18:25:09.000Z","dateUpdated":"2024-08-03T23:25:31.019Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2021-05-12T00:00:00.000Z"},"containers":{"cna":{"title":"ReDoS in Sec-Websocket-Protocol header","descriptions":[{"lang":"en","value":"ws is an open source WebSocket client and server library for Node.js. A specially crafted value of the `Sec-Websocket-Protocol` header can be used to significantly slow down a ws server. The vulnerability has been fixed in ws@7.4.6 (https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff). In vulnerable versions of ws, the issue can be mitigated by reducing the maximum allowed length of the request headers using the [`--max-http-header-size=size`](https://nodejs.org/api/cli.html#cli_max_http_header_size_size) and/or the [`maxHeaderSize`](https://nodejs.org/api/http.html#http_http_createserver_options_requestlistener) options."}],"affected":[{"vendor":"websockets","product":"ws","versions":[{"version":">= 5.0.0 <= 7.4.5","status":"affected"}]}],"references":[{"url":"https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff","tags":["x_refsource_MISC"]},{"url":"https://lists.apache.org/thread.html/rdfa7b6253c4d6271e31566ecd5f30b7ce1b8fb2c89d52b8c4e0f4e30%40%3Ccommits.tinkerpop.apache.org%3E","name":"[tinkerpop-commits] 20210701 [tinkerpop] 01/03: Bumped ws to 6.2.2 to address CVE-2021-32640 CTR","tags":["mailing-list","x_refsource_MLIST"]},{"url":"https://security.netapp.com/advisory/ntap-20210706-0005/","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","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:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","dateUpdated":"2021-07-06T07:06:26.000Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa"},"source":{"advisory":"GHSA-6fc8-4gx4-v693","discovery":"UNKNOWN"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2021-32640","STATE":"PUBLIC","TITLE":"ReDoS in Sec-Websocket-Protocol header"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"ws","version":{"version_data":[{"version_value":">= 5.0.0 <= 7.4.5"}]}}]},"vendor_name":"websockets"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"ws is an open source WebSocket client and server library for Node.js. A specially crafted value of the `Sec-Websocket-Protocol` header can be used to significantly slow down a ws server. The vulnerability has been fixed in ws@7.4.6 (https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff). In vulnerable versions of ws, the issue can be mitigated by reducing the maximum allowed length of the request headers using the [`--max-http-header-size=size`](https://nodejs.org/api/cli.html#cli_max_http_header_size_size) and/or the [`maxHeaderSize`](https://nodejs.org/api/http.html#http_http_createserver_options_requestlistener) options."}]},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","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:L","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-400: Uncontrolled Resource Consumption"}]}]},"references":{"reference_data":[{"name":"https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693","refsource":"CONFIRM","url":"https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693"},{"name":"https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff","refsource":"MISC","url":"https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff"},{"name":"[tinkerpop-commits] 20210701 [tinkerpop] 01/03: Bumped ws to 6.2.2 to address CVE-2021-32640 CTR","refsource":"MLIST","url":"https://lists.apache.org/thread.html/rdfa7b6253c4d6271e31566ecd5f30b7ce1b8fb2c89d52b8c4e0f4e30@%3Ccommits.tinkerpop.apache.org%3E"},{"name":"https://security.netapp.com/advisory/ntap-20210706-0005/","refsource":"CONFIRM","url":"https://security.netapp.com/advisory/ntap-20210706-0005/"}]},"source":{"advisory":"GHSA-6fc8-4gx4-v693","discovery":"UNKNOWN"}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://lists.apache.org/thread.html/rdfa7b6253c4d6271e31566ecd5f30b7ce1b8fb2c89d52b8c4e0f4e30%40%3Ccommits.tinkerpop.apache.org%3E","name":"[tinkerpop-commits] 20210701 [tinkerpop] 01/03: Bumped ws to 6.2.2 to address CVE-2021-32640 CTR","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://security.netapp.com/advisory/ntap-20210706-0005/","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T23:25:31.019Z"}}]}}}