[krbdev.mit.edu #5595] Problems with kpasswd and an IPv6 enviroment

[Ken Raeburn via RT]

Some brief analysis, because I was prodded to look at it:

changepw.c has code that assumes the local socket address will be an IPv4 address, so the 
address saved to put into the krb-priv message (in a required field) will be an IPv4 address, 
containing 4 bytes snarfed from within the IPv6 sockaddr structure.  Also, other code makes the 
same assumption about the remote address.  However, nothing in the address-lookup code 
restricts us to IPv6 servers, so rather than complain that we can't find an IPv4 server, we send an 
IPv6 server a broken request.