undici before v5.8.0 vulnerable to CRLF injection in request headers

Impact

It is possible to inject CRLF sequences into request headers in Undici.

const undici = require('undici')

const response = undici.request("http://127.0.0.1:1000", {
  headers: {'a': "\r\nb"}
})

The same applies to path and method

Patches

Update to v5.8.0

Workarounds

Sanitize all HTTP headers from untrusted sources to eliminate \r\n.

References

https://hackerone.com/reports/409943
https://vulners.com/cve/CVE-2018-12116

For more information

If you have any questions or comments about this advisory:

• Open an issue in undici repository
• To make a report, follow the SECURITY document