Vulnerability-Lookup

ubuntu-cve-2021-32640

Vulnerability from osv_ubuntu

Published

2021-05-25 19:15

Modified

2025-10-24 04:50

Summary

Details

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 and/or the maxHeaderSize options.

Severity

5.3 (Medium)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

5.3 (Medium)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2021-32640	REPORT
	https://github.com/websockets/ws/security/advisor…	REPORT
	https://github.com/websockets/ws/commit/00c425ec7…	REPORT
	https://www.cve.org/CVERecord?id=CVE-2021-32640	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-ws",
            "binary_version": "1.0.1+ds1.e6ddaae4-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "node-ws",
        "purl": "pkg:deb/ubuntu/node-ws@1.0.1+ds1.e6ddaae4-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.7.2+ds1.349b7460-1",
        "1.0.1+ds1.e6ddaae4-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-ws",
            "binary_version": "1.1.0+ds1.e6ddaae4-3ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "node-ws",
        "purl": "pkg:deb/ubuntu/node-ws@1.1.0+ds1.e6ddaae4-3ubuntu1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.0+ds1.e6ddaae4-3build1",
        "1.1.0+ds1.e6ddaae4-3ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-ws",
            "binary_version": "7.2.1-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "node-ws",
        "purl": "pkg:deb/ubuntu/node-ws@7.2.1-3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.0+ds1.e6ddaae4-5",
        "7.2.1-2",
        "7.2.1-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-ws",
            "binary_version": "8.5.0+~cs13.3.3-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "node-ws",
        "purl": "pkg:deb/ubuntu/node-ws@8.5.0+~cs13.3.3-2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.4.2+~cs18.0.8-2",
        "7.5.5+~cs13.0.13-1",
        "8.5.0+~cs13.3.3-2"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2021-32640",
  "modified": "2025-10-24T04:50:20Z",
  "published": "2021-05-25T19:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-32640"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-32640"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-32640"
  ]
}

CVE-2021-32640 (GCVE-0-2021-32640)

Vulnerability from cvelistv5 – Published: 2021-05-25 18:25 – Updated: 2024-08-03 23:25

Title

ReDoS in Sec-Websocket-Protocol header

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.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M

References

4 references

URL	Tags
https://github.com/websockets/ws/security/advisor…	x_refsource_CONFIRM
https://github.com/websockets/ws/commit/00c425ec7…	x_refsource_MISC
https://lists.apache.org/thread.html/rdfa7b6253c4…	mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2021070…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
websockets	ws	Affected: >= 5.0.0 <= 7.4.5

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:25:31.019Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "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",
              "x_transferred"
            ],
            "url": "https://lists.apache.org/thread.html/rdfa7b6253c4d6271e31566ecd5f30b7ce1b8fb2c89d52b8c4e0f4e30%40%3Ccommits.tinkerpop.apache.org%3E"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210706-0005/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "ws",
          "vendor": "websockets",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.0.0 \u003c= 7.4.5"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "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": "2021-07-06T07:06:26.000Z",
        "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": "\u003e= 5.0.0 \u003c= 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"
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              ]
            }
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        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693",
              "refsource": "CONFIRM",
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            },
            {
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              "url": "https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff"
            },
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              "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"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2021-32640",
    "datePublished": "2021-05-25T18:25:09.000Z",
    "dateReserved": "2021-05-12T00:00:00.000Z",
    "dateUpdated": "2024-08-03T23:25:31.019Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

ubuntu-cve-2021-32640

Vulnerability from osv_ubuntu

CVE-2021-32640 (GCVE-0-2021-32640)

Tags

Sightings

Nomenclature