GHSA-3329-pjwv-fjpg
Suggest an improvement- Source
- https://github.com/advisories/GHSA-3329-pjwv-fjpg
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/12/GHSA-3329-pjwv-fjpg/GHSA-3329-pjwv-fjpg.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/GHSA-3329-pjwv-fjpg
- Aliases
- Related
- Published
- 2020-12-30T23:40:48Z
- Modified
- 2023-11-01T04:52:46.035261Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- Hostname spoofing via backslashes in URL
- Details
-
Impact
If using affected versions to determine a URL's hostname, the hostname can be spoofed by using a backslash (
\) character followed by an at (@) character. If the hostname is used in security decisions, the decision may be incorrect.Depending on library usage and attacker intent, impacts may include allow/block list bypasses, SSRF attacks, open redirects, or other undesired behavior.
Example URL:
https://expected-example.com\@observed-example.comEscaped string:https://expected-example.com\\@observed-example.com(JavaScript strings must escape backslash)Affected versions incorrectly return
observed-example.com. Patched versions correctly returnexpected-example.com. Patched versions match the behavior of other parsers which implement the WHATWG URL specification, including web browsers and Node's built-in URL class.Patches
Version 1.19.4 is patched against all known payload variants. Version 1.19.3 has a partial patch but is still vulnerable to a payload variant.
References
https://github.com/medialize/URI.js/releases/tag/v1.19.4 (complete fix for this bypass) https://github.com/medialize/URI.js/releases/tag/v1.19.3 (partial fix for this bypass) PR #233 (initial fix for backslash handling)
For more information
If you have any questions or comments about this advisory, open an issue in https://github.com/medialize/URI.js
Reporter credit
- Database specific
{ "severity": "MODERATE", "nvd_published_at": "2020-12-31T00:15:00Z", "github_reviewed": true, "github_reviewed_at": "2020-12-30T23:40:28Z", "cwe_ids": [ "CWE-20" ] }- References
-
- https://github.com/medialize/URI.js/security/advisories/GHSA-3329-pjwv-fjpg
- https://nvd.nist.gov/vuln/detail/CVE-2020-26291
- https://github.com/medialize/URI.js/commit/b02bf037c99ac9316b77ff8bfd840e90becf1155
- https://github.com/medialize/URI.js
- https://github.com/medialize/URI.js/releases/tag/v1.19.4
- https://www.npmjs.com/advisories/1595
- https://www.npmjs.com/package/urijs
Affected packages
npm / urijs
Package
- Name
- urijs
- View open source insights on deps.dev
- Purl
- pkg:npm/urijs