GHSA-wqq4-5wpv-mx2g

Suggest an improvement
Source
https://github.com/advisories/GHSA-wqq4-5wpv-mx2g
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/10/GHSA-wqq4-5wpv-mx2g/GHSA-wqq4-5wpv-mx2g.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-wqq4-5wpv-mx2g
Aliases
Published
2023-10-16T14:05:37Z
Modified
2024-02-16T22:37:23Z
Severity
  • 3.9 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L CVSS Calculator
Summary
Undici's cookie header not cleared on cross-origin redirect in fetch
Details

Impact

Undici clears Authorization headers on cross-origin redirects, but does 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 specification, 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 3rd-party site or a malicious attacker who can control the redirection target (ie. an open redirector) to leak the cookie to the 3rd party site.

Patches

This was patched in e041de359221ebeae04c469e8aff4145764e6d76, which is included in version 5.26.2.

References

Affected packages

npm / undici

Package

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.26.2