Why rhncfg-manager fails to upload file with 000 permission?

Issue

Why rhncfg-manager fails to upload file with 000 permission?
When trying to upload file with permission 000 using rhncfg-manager it fails with 500 Internal Server Error

rhncfg packages:

rhncfg-5.10.74-8.el6sat.noarch
rhncfg-management-5.10.74-8.el6sat.noarch
rhncfg-actions-5.10.74-8.el6sat.noarch
rhncfg-client-5.10.74-8.el6sat.noarch

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Here are the common uses of Markdown.

Code blocks

~~~
Code surrounded in tildes is easier to read
~~~

Links/URLs

[Red Hat Customer Portal](https://access.redhat.com)