CVE-2021-32640
Vulnerability from cvelistv5
Published
2021-05-25 18:25
Modified
2024-08-03 23:25
Severity ?
EPSS score ?
Summary
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.
References
Impacted products
Vendor | Product | Version | |
---|---|---|---|
▼ | websockets | ws |
Version: >= 5.0.0 <= 7.4.5 |
|
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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.", }, ], 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: { dateUpdated: "2021-07-06T07:06:26", orgId: "a0819718-46f1-4df5-94e2-005712e83aaa", shortName: "GitHub_M", }, references: [ { tags: [ "x_refsource_CONFIRM", ], url: "https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693", }, { tags: [ "x_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", tags: [ "mailing-list", "x_refsource_MLIST", ], url: "https://lists.apache.org/thread.html/rdfa7b6253c4d6271e31566ecd5f30b7ce1b8fb2c89d52b8c4e0f4e30%40%3Ccommits.tinkerpop.apache.org%3E", }, { tags: [ "x_refsource_CONFIRM", ], url: "https://security.netapp.com/advisory/ntap-20210706-0005/", }, ], source: { advisory: "GHSA-6fc8-4gx4-v693", discovery: "UNKNOWN", }, title: "ReDoS in Sec-Websocket-Protocol header", 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. 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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.\"}, {\"lang\": \"es\", \"value\": \"ws es una biblioteca de servidor y cliente WebSocket de c\\u00f3digo abierto para Node.js. Un valor especialmente dise\\u00f1ado del encabezado \\\"Sec-Websocket-Protocol\\\" puede ser usado para ralentizar significativamente un servidor ws. La vulnerabilidad ha sido corregida en la versi\\u00f3n ws@7.4.6 (https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff). En las versiones vulnerables de ws, el problema puede ser mitigado al reducir la longitud m\\u00e1xima permitida de los encabezados de petici\\u00f3n utilizando 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\"value\": \"CWE-400\"}]}]", }, nvd: "{\"cve\":{\"id\":\"CVE-2021-32640\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2021-05-25T19:15:07.767\",\"lastModified\":\"2024-11-21T06:07:26.223\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"ws is an open source WebSocket client and server library for Node.js. 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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.