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Lotus Domino Web Server Host/Location Buffer Overflow Vulnerability (#NISR17022003a)



NGSSoftware Insight Security Research Advisory

Name:    Lotus Domino Web Server Host/Location Buffer Overflow Vulnerability
Systems Affected:  Release 6.0
Severity:  Critical Risk
Category: Remote System Buffer Overrun
Vendor URL:   http://www.lotus.com
Author:   Mark Litchfield (mark@xxxxxxxxxxxxxxx)
Date:   17th February 2003
Advisory number: #NISR17022003a


Description
***********
Lotus Domino and Notes together provide a featured enterprise collaboration
system with Domino providing application server services.

Details
*******
Lotus Domino 6 suffers from a remotley exploitable buffer overrun
vulnerability when performing a redirect operation. When building the 302
Redirect response, the server takes the client provided "Host" header and
implants this value into the "Location" server header. By requesting certain
documents or views in certain databases the server can be forced to perform
a redirect operation and by supplying an overly long string for the
hostname, a buffer can be overflowed allowing an attacker to gain control of
the Domino Web Services process. By default these databases can be accessed
by anonymous users. Any arbitray code supplied will run in the context of
the account running Domino allowing an attacker to gain control of the
server.

Fix Information
***************
IBM Lotus Notes and Domino Release 6.0.1 is now available and being marketed
as the first maintenance release.  IBM say if customers haven't already
upgraded or migrated to Notes and Domino 6, now is the time to move and
start reaping the benefits of this existing and highly praised release.
Release 6.0.1 includes fixes to enhance the quality and reliability of the
Notes and Domino 6 products.  It does not however mention any security
issues, and NGS would strongly advise to upgrade as soon as possible not to
just tp "reap the benefits" but to secure the server and data against
possible attacks.

The upgrade / patch can be obtained from

http://www14.software.ibm.com/webapp/download/search.jsp?q=&cat=&pf=&k=&dt=&;
go=y&rs=ESD-NOTECLNTi&S_TACT=&S_CMP=&sb=r

A check for this issue has been added to DominoScan R2, a comprehensive
automated intelligent assessment tool for Lotus Domino Servers of which more
information is available from the NGSSite

http://www.ngssoftware.com/software/dominoscan.html

Further Information
*******************
For further information about the scope and effects of buffer overflows,
please see

http://www.ngssoftware.com/papers/non-stack-bo-windows.pdf
http://www.ngssoftware.com/papers/ntbufferoverflow.html
http://www.ngssoftware.com/papers/bufferoverflowpaper.rtf
http://www.ngssoftware.com/papers/unicodebo.pdf

About NGSSoftware
*****************
NGSSoftware design, research and develop intelligent, advanced application
security assessment scanners. Based in the United Kingdom, NGSSoftware have
offices in the South of London and the East Coast of Scotland. NGSSoftware's
sister company NGSConsulting, offers best of breed security consulting
services, specialising in application, host and network security
assessments.

http://www.ngssoftware.com/
http://www.ngsconsulting.com/

Telephone +44 208 401 0070
Fax +44 208 401 0076

enquiries@xxxxxxxxxxxxxxx