CVE-2022-35949
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`.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.75%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 `undici@5.8.1`. The best workaround is to validate user input before passing it to the `undici.request` call.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.75% probability · 77th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-918
- Affected
- nodejs/undici
- Source
- security-advisories@github.com
References
- https://github.com/nodejs/undici/commit/124f7ebf705366b2e1844dff721928d270f87895Patch, Third Party Advisory
- https://github.com/nodejs/undici/releases/tag/v5.8.2Release Notes, Third Party Advisory
- https://github.com/nodejs/undici/security/advisories/GHSA-8qr4-xgw6-wmr3Exploit, Mitigation, Third Party Advisory
- https://github.com/nodejs/undici/commit/124f7ebf705366b2e1844dff721928d270f87895Patch, Third Party Advisory
- https://github.com/nodejs/undici/releases/tag/v5.8.2Release Notes, Third Party Advisory
- https://github.com/nodejs/undici/security/advisories/GHSA-8qr4-xgw6-wmr3Exploit, Mitigation, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.