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Security Advisories: GSA_kwCzR0hTQS04cXI0LXhndzYtd21yM84AAuFj

`undici.request` vulnerable to SSRF using absolute URL on `pathname`

Impact

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

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.

Patches

This issue was fixed in [email protected].

Workarounds

The best workaround is to validate user input before passing it to the undici.request call.

For more information

If you have any questions or comments about this advisory:

Permalink: https://github.com/advisories/GHSA-8qr4-xgw6-wmr3
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS04cXI0LXhndzYtd21yM84AAuFj
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 1 year ago
Updated: about 1 year ago


CVSS Score: 5.3
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Identifiers: GHSA-8qr4-xgw6-wmr3, CVE-2022-35949
References: Repository: https://github.com/nodejs/undici
Blast Radius: 26.5

Affected Packages

npm:undici
Dependent packages: 1,956
Dependent repositories: 98,048
Downloads: 35,987,480 last month
Affected Version Ranges: <= 5.8.1
Fixed in: 5.8.2
All affected versions: 0.1.0, 0.2.0, 0.3.0, 0.3.1, 0.3.2, 0.3.3, 0.4.0, 0.5.0, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.1.0, 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4, 1.2.5, 1.2.6, 1.3.0, 1.3.1, 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.1.0, 2.1.1, 2.2.0, 2.2.1, 3.0.0, 3.1.0, 3.2.0, 3.3.0, 3.3.1, 3.3.2, 3.3.3, 3.3.4, 3.3.5, 3.3.6, 4.0.0, 4.1.0, 4.1.1, 4.2.0, 4.2.1, 4.2.2, 4.3.0, 4.3.1, 4.4.1, 4.4.2, 4.4.3, 4.4.4, 4.4.5, 4.4.6, 4.4.7, 4.5.0, 4.5.1, 4.6.0, 4.7.0, 4.7.1, 4.7.2, 4.7.3, 4.8.0, 4.8.1, 4.8.2, 4.9.0, 4.9.1, 4.9.2, 4.9.3, 4.9.4, 4.9.5, 4.10.0, 4.10.1, 4.10.2, 4.10.3, 4.10.4, 4.11.0, 4.11.1, 4.11.2, 4.11.3, 4.12.0, 4.12.1, 4.12.2, 4.13.0, 4.14.0, 4.14.1, 4.15.0, 4.15.1, 4.16.0, 5.0.0, 5.1.0, 5.1.1, 5.2.0, 5.3.0, 5.4.0, 5.5.0, 5.5.1, 5.6.0, 5.6.1, 5.7.0, 5.8.0, 5.8.1
All unaffected versions: 5.8.2, 5.9.0, 5.9.1, 5.10.0, 5.11.0, 5.12.0, 5.13.0, 5.14.0, 5.15.0, 5.15.1, 5.15.2, 5.16.0, 5.17.0, 5.17.1, 5.18.0, 5.19.0, 5.19.1, 5.20.0, 5.21.0, 5.21.1, 5.21.2, 5.22.0, 5.22.1, 5.23.0, 5.24.0, 5.25.0, 5.25.1, 5.25.2, 5.25.3, 5.25.4, 5.26.0, 5.26.1, 5.26.2, 5.26.3, 5.26.4, 5.26.5, 5.27.0, 5.27.1, 5.27.2, 5.28.0, 5.28.1, 5.28.2, 5.28.3, 5.28.4, 6.0.0, 6.0.1, 6.1.0, 6.2.0, 6.2.1, 6.3.0, 6.4.0, 6.5.0, 6.6.0, 6.6.1, 6.6.2, 6.7.0, 6.7.1, 6.8.0, 6.9.0, 6.10.0, 6.10.1, 6.10.2, 6.11.0, 6.11.1, 6.12.0, 6.13.0, 6.14.0, 6.14.1, 6.15.0