{"id":"GHSA-89gv-h8wf-cg8r","summary":"URIjs Vulnerable to Hostname spoofing via backslashes in URL ","details":"### Impact\nIf using affected versions to determine a URL's hostname, the hostname can be spoofed by using a combination of backslash (`\\`) and slash (`/`) characters as part of the scheme delimiter, e.g. `scheme:/\\/\\/\\hostname`. If the hostname is used in security decisions, the decision may be incorrect.\n\nDepending on library usage and attacker intent, impacts may include allow/block list bypasses, SSRF attacks, open redirects, or other undesired behavior.\n\nExample URL: `https:/\\/\\/\\expected-example.com/path`\nEscaped string: `https:/\\\\/\\\\/\\\\expected-example.com/path` (JavaScript strings must escape backslash)\n\nAffected versions incorrectly return no hostname. Patched versions correctly return `expected-example.com`. Patched versions match the behavior of other parsers which implement the [WHATWG URL specification](https://url.spec.whatwg.org/), including web browsers and [Node's built-in URL class](https://nodejs.org/api/url.html).\n\n### Patches\nVersion 1.19.7 is patched against all known payload variants.\n\n### References\nhttps://github.com/medialize/URI.js/releases/tag/v1.19.7 (fix for this particular bypass)\nhttps://github.com/medialize/URI.js/releases/tag/v1.19.6 (fix for related bypass)\nhttps://github.com/medialize/URI.js/releases/tag/v1.19.4 (fix for related bypass)\nhttps://github.com/medialize/URI.js/releases/tag/v1.19.3 (fix for related bypass)\n[PR #233](https://github.com/medialize/URI.js/pull/233) (initial fix for backslash handling)\n\n### For more information\nIf you have any questions or comments about this advisory, open an issue in https://github.com/medialize/URI.js\n\n### Reporter credit\n[ready-research](https://github.com/ready-research) via https://huntr.dev/","aliases":["CVE-2021-3647"],"modified":"2023-11-01T04:55:46.236483Z","published":"2021-07-19T21:22:36Z","database_specific":{"cwe_ids":["CWE-601"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2021-07-19T16:38:54Z","nvd_published_at":"2021-07-16T11:15:00Z"},"references":[{"type":"WEB","url":"https://github.com/medialize/URI.js/security/advisories/GHSA-89gv-h8wf-cg8r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3647"},{"type":"WEB","url":"https://github.com/medialize/URI.js/pull/233"},{"type":"WEB","url":"https://github.com/medialize/URI.js/commit/ac43ca8f80c042f0256fb551ea5203863dec4481"},{"type":"WEB","url":"https://github.com/medialize/URI.js/releases/tag/v1.19.3"},{"type":"WEB","url":"https://github.com/medialize/URI.js/releases/tag/v1.19.4"},{"type":"WEB","url":"https://github.com/medialize/URI.js/releases/tag/v1.19.6"},{"type":"WEB","url":"https://github.com/medialize/URI.js/releases/tag/v1.19.7"},{"type":"WEB","url":"https://huntr.dev/bounties/1625558772840-medialize/URI.js"}],"affected":[{"package":{"name":"urijs","ecosystem":"npm","purl":"pkg:npm/urijs"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.19.7"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/07/GHSA-89gv-h8wf-cg8r/GHSA-89gv-h8wf-cg8r.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}