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CVE-2023-45143

Published: 12 October 2023

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.

Priority

Medium

Cvss 3 Severity Score

3.5

Score breakdown

Status

Package Release Status
node-undici
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Does not exist

lunar Ignored
(end of life, was needs-triage)
mantic Needs triage

trusty Does not exist

upstream
Released (5.26.3+dfsg1+~cs23.10.12-1)
xenial Does not exist

Patches:
upstream: https://github.com/nodejs/undici/commit/e041de359221ebeae04c469e8aff4145764e6d76

Severity score breakdown

Parameter Value
Base score 3.5
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N