What is the ruling on wiping over the feet inside the shoe (kundra)?

It is permissible to wipe over "kandara" (a type of shoe) during ablution if it covers the obligatory area including the ankles, and was put on while in a state of ritual purity (after a ghusl). However, if it is short such that the ankles are visible, then one may wipe over it along with the socks. If one removes it after wiping, then the socks must also be removed.