Red Hat Ansible Automation Platform 2: insecure direct object reference

A flaw was found in the automation-controller notification

subsystem. Although NotificationTemplate.notification_

configuration is protected from API filtering, its recipient

value is copied in clear text into the unprotected

Notification.recipients field on every send. Because the

credential-types endpoint is listable by any authenticated

user and the API filter backend traverses object relations

without per-hop authorization, a user with no privileges can

use a relational filter as a boolean count-oracle to recover,

character by character and across organizations, the secret

recipient values of other tenants' notifications — including

PagerDuty service keys and Slack/Mattermost/RocketChat/Webhook

bearer-token URLs. This flaw affects confidentiality.