{"id":"GHSA-q9mw-68c2-j6m5","summary":"engine.io Uncaught Exception vulnerability","details":"### Impact\n\nA specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server, thus killing the Node.js process.\n\n```\nTypeError: Cannot read properties of undefined (reading 'handlesUpgrades')\n    at Server.onWebSocket (build/server.js:515:67)\n```\n\nThis impacts all the users of the [`engine.io`](https://www.npmjs.com/package/engine.io) package, including those who uses depending packages like [`socket.io`](https://www.npmjs.com/package/socket.io).\n\n### Patches\n\nA fix has been released today (2023/05/02): [6.4.2](https://github.com/socketio/engine.io/releases/tag/6.4.2)\n\nThis bug was introduced in version 5.1.0 and included in version 4.1.0 of the `socket.io` parent package. Older versions are not impacted.\n\nFor `socket.io` users:\n\n| Version range               | `engine.io` version | Needs minor update?                                                                                    |\n|-----------------------------|---------------------|--------------------------------------------------------------------------------------------------------|\n| `socket.io@4.6.x`           | `~6.4.0`            | `npm audit fix` should be sufficient                                                                   |\n| `socket.io@4.5.x`           | `~6.2.0`            | Please upgrade to `socket.io@4.6.x`                                                                    |\n| `socket.io@4.4.x`           | `~6.1.0`            | Please upgrade to `socket.io@4.6.x`                                                                    |\n| `socket.io@4.3.x`           | `~6.0.0`            | Please upgrade to `socket.io@4.6.x`                                                                    |\n| `socket.io@4.2.x`           | `~5.2.0`            | Please upgrade to `socket.io@4.6.x`                                                                    |\n| `socket.io@4.1.x`           | `~5.1.1`            | Please upgrade to `socket.io@4.6.x`                                                                    |\n| `socket.io@4.0.x`           | `~5.0.0`            | Not impacted |\n| `socket.io@3.1.x`           | `~4.1.0`            | Not impacted |\n| `socket.io@3.0.x`           | `~4.0.0`            | Not impacted |\n| `socket.io@2.5.0`           | `~3.6.0`            | Not impacted |\n| `socket.io@2.4.x` and below | `~3.5.0`            | Not impacted |\n\n### Workarounds\n\nThere is no known workaround except upgrading to a safe version.\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Open an issue in [`engine.io`](https://github.com/socketio/engine.io)\n\nThanks to Thomas Rinsma from Codean for the responsible disclosure.","aliases":["CVE-2023-31125"],"modified":"2025-02-13T18:54:10Z","published":"2023-05-03T21:56:51Z","related":["CVE-2023-31125"],"database_specific":{"nvd_published_at":"2023-05-08T21:15:11Z","github_reviewed_at":"2023-05-03T21:56:51Z","cwe_ids":["CWE-248"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/socketio/engine.io/security/advisories/GHSA-q9mw-68c2-j6m5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-31125"},{"type":"WEB","url":"https://github.com/socketio/engine.io/commit/fc480b4f305e16fe5972cf337d055e598372dc44"},{"type":"PACKAGE","url":"https://github.com/socketio/engine.io"},{"type":"WEB","url":"https://github.com/socketio/engine.io/releases/tag/6.4.2"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20230622-0002"}],"affected":[{"package":{"name":"engine.io","ecosystem":"npm","purl":"pkg:npm/engine.io"},"ranges":[{"type":"SEMVER","events":[{"introduced":"5.1.0"},{"fixed":"6.4.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/05/GHSA-q9mw-68c2-j6m5/GHSA-q9mw-68c2-j6m5.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}