NGSSoftware Insight Security Research Advisory Name: Lotus iNotes Client ActiveX Control Buffer Overrun Systems Affected: Release 6.0 Severity: Medium Risk Category: Remote System Buffer Overrun Vendor URL: http://www.lotus.com Author: Mark Litchfield (markat_private) Date: 17th February 2003 Advisory number: #NISR17022003e Description *********** Lotus Domino and Notes together provide a featured enterprise collaboration system with Domino providing application server services. iNotes provides web based messaging facilities. As well as having a server component there exists a client ActiveX control. Details ******* When iNotes is installed there is an ActiveX control called Lotus Domino Session ActiveX Control. By supplying an overly long value to the "InitializeUsingNotesUserName" method of this control via an e-mail or web page it is possible for an attacker to execute arbitary code on the target's local machine. Any exploit code would execute in the security context of the logged on user. Fix Information *************** NGSSoftware alerted IBM/Lotus to this issue on the 14th of January 2002. 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 to "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 enquiriesat_private
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