RE: iSeries FTP security

[shalom@xxxxxxxxxx]

Scott,
These are vulnerabilities of a particular implementation of FTP, 
in a specific operating system - OS400. 

The problem is not with the implementation of FTP, but with the false sense of 
security we had when we installed an FTP exit program and thought that 
it works in a specific way, when in fact it provides a loophole for 
unplanned access. 

The same applies to the iSeries implementation of LDAP. 
A limited iSeries user cannot run WRKUSRPRF, 
but the LDAP query provides full information about a group of local users, 
including all of the profile attributes. 

This feature is not found in other LDAP products.
Netscape LDAP does not disclose the list of local users that 
are defined on the server it runs on.


I agree that the LDAP issue is not a major problem, 
but it was never presented as such. 

Regards,
Shalom Carmel
-------------
www.venera.com - Exposing iSeries insecurity



-----Original Message-----
Subject: RE: iSeries FTP security 
From: "Ingvaldson, Scott" <SIngvaldson@xxxxxxxxxxxx> 
Date: Tue, 17 May 2005 10:52:05 -0500 

Shalom -

For simplicity I'll concede every one of your points.  Now please
explain to me why these are iSeries vulnerabilities rather than FTP or
LDAP vulnerabilities. 

Regards,
 
Scott Ingvaldson
iSeries System Administrator
GuideOne Insurance Group