An authentication bypass vulnerability has been identified in Foreman when deployed with Gunicorn versions prior to 22.0, due to the puppet-foreman configuration. This issue arises from Apache's modproxy not properly unsetting headers because of restrictions on underscores in HTTP headers, allowing authentication through a malformed header. This flaw impacts all active Satellite deployments (6.13, 6.14 and 6.15) which are using Pulpcore version 4.0+ and could potentially enable unauthorized users to gain administrative access.

An authentication bypass vulnerability exists in Foreman due to Pulpcore when deployed with Gunicorn versions earlier than 22.0. The issue arises from how Apache’s modproxy handles header as it fails to unset it properly due to restrictions on underscores in HTTP headers. This allow authentication through malformed header instead. This flaw affects all Katello/Satellite 6.10+ deployments using Pulpcore from version 4.0+ and could potentially allow unauthorized users to gain admin access.

gunicorn version 19.4.5 contains a CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers vulnerability in "processheaders" function in "gunicorn/http/wsgi.py" that can result in an attacker causing the server to return arbitrary HTTP headers. This vulnerability appears to have been fixed in 19.5.0.