RE: iSeries FTP security

["Joe Pluta" <joepluta@xxxxxxxxxxxxxxxxx>]

A folder with more outside access than normal.  The folder is accessible
via users with limited authority (and no access to other parts of the
system).

This is not the best solutions, however.  The iSeries FTP server is not
the most robust I have seen.  Many servers allow you to map a user's
root directory, which completely invalidates the ".." exploit.

One of the best I have seen was the IBM PTF download.  First, IBM built
a virtual user.  Then, they virtualized that user's access to just his
home directory and below, such that his "root" was actually the home
directory for that user.  Thus, the ".." exploit would never get out of
his home directory.  Then they copied the files to his folder.  Thus,
everybody got the exact same instructions ("Log on, CD to \ptf, and
download the files"), even though there were tons of folders on the
server.

Joe


> From: rob@xxxxxxxxx
> 
> What's a "sandbox"?