CVE-2022-35949

Vulnerability Description

undici is an HTTP/1.1 client, written from scratch for Node.js.`undici` is vulnerable to SSRF (Server-side Request Forgery) when an application takes in **user input** into the `path/pathname` option of `undici.request`. If a user specifies a URL such as `http://127.0.0.1` or `//127.0.0.1` ```js const undici = require("undici") undici.request({origin: "http://example.com", pathname: "//127.0.0.1"}) ``` Instead of processing the request as `http://example.org//127.0.0.1` (or `http://example.org/http://127.0.0.1` when `http://127.0.0.1 is used`), it actually processes the request as `http://127.0.0.1/` and sends it to `http://127.0.0.1`. If a developer passes in user input into `path` parameter of `undici.request`, it can result in an _SSRF_ as they will assume that the hostname cannot change, when in actual fact it can change because the specified path parameter is combined with the base URL. This issue was fixed in `[email protected]`. The best workaround is to validate user input before passing it to the `undici.request` call.

CVSS Score

Affected Products

Related Weaknesses (CWE)

References

• https://github.com/nodejs/undici/commit/124f7ebf705366b2e1844dff721928d270f87895PatchThird Party Advisory
• https://github.com/nodejs/undici/releases/tag/v5.8.2Release NotesThird Party Advisory
• https://github.com/nodejs/undici/security/advisories/GHSA-8qr4-xgw6-wmr3ExploitMitigationThird Party Advisory
• https://github.com/nodejs/undici/commit/124f7ebf705366b2e1844dff721928d270f87895PatchThird Party Advisory
• https://github.com/nodejs/undici/releases/tag/v5.8.2Release NotesThird Party Advisory
• https://github.com/nodejs/undici/security/advisories/GHSA-8qr4-xgw6-wmr3ExploitMitigationThird Party Advisory