CVE-2023-45143 Information

Description

Undici is an HTTP/1.1 client written from scratch for Node.js. Prior to version 5.26.2 Undici already cleared Authorization headers on cross-origin redirects but did not clear Cookie headers. By design cookie headers are forbidden request headers disallowing them to be set in RequestInit.headers in browser environments. Since undici handles headers more liberally than the spec there was a disconnect from the assumptions the spec made and undici’s implementation of fetch. As such this may lead to accidental leakage of cookie to a third-party site or a malicious attacker who can control the redirection target (ie. an open redirector) to leak the cookie to the third party site. This was patched in version 5.26.2. There are no known workarounds.

Reference

https://github.com/nodejs/undici/security/advisories/GHSA-q768-x9m6-m9qp https://hackerone.com/reports/2166948 https://github.com/nodejs/undici/security/advisories/GHSA-wqq4-5wpv-mx2g https://github.com/nodejs/undici/commit/e041de359221ebeae04c469e8aff4145764e6d76 https://github.com/nodejs/undici/releases/tag/v5.26.2