It was found that rhnsd PID files are created as world-writable that allows local attackers to fill the disks or to kill selected processes.
Issue was reportedly introduced by commit 75d9c00b96ab430221c5c7668baebebc74ddd67e
RHEL7 BZ: Bug 1480306
Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.