It is impossible to change the ordering of fields, other than custom fields, for the View Issue screen. When I searched on documentation on how to put the description field in front of the attachments block, I noticed that other users have got the exact same request. Currently, the description field can only be moved by changing the viewissue.jsp page.

I think that the ordering of the View Issue screen should be maintained as much as possible, leaving out the fields that are already in the Issue Details section.

A note in the Associating Screens with Issue Operations section of the documentation says:

The "View Issue" operation only allows one to control the layout of custom fields in the middle of the "View Issue" page. The "View Issue" page ignores all the non-custom fields on the Screen.