Lotus Domino ESMTP Service Buffer overflow



Advisory Code:   VIGILANTE-2000011



Release Date:

September 11, 2000



Systems Affected:

Lotus Domino Release 5.0.2a (Intl) ESMTP Service on OS/2 Warp 4.5

Lotus Domino Release 5.0.2c (Intl) ESMTP Service on OS/2 Warp 4.5

Earlier versions of the ESMTP service can be vulnerable. ESMTP service on

other operating systems can be vulnerable as well. This has not been tested.





THE PROBLEM

When opening a connection to the SMTP service and filling the arguments to

the following commands:

"rcpt to"

"saml from"

"soml from"

with a buffer of size 4096 chars the service will crash. This is similar to

the "mail from" denial-of-service vulnerability reported in

http://www.securityfocus.com/vdb/bottom.html?vid=1229

The service will also crash when the command "mail from" receives an

argument on a size of 4096 chars but that is a known vulnerability.



Vendor Status:

Lotus Denmark was contacted on the 11th of August. The 29th of August we

received notification regarding a fix.



Fix (quote from the vendor):



" 5/25/00 fix smtp crash with long mail from. (SPR WAT4KKHUR) Fix is based

on build v504_05192000



6/19/00 More denial of service attack fixes (SPR JSHY4HEV9B) Fix is based on

build v505_05312000 "



Fix SPR JSHY4HEV9B should be available in the beginning of September.



Please contact Lotus support for information on location on SPR JSHY4HEV9B.



Vendor   URL: http://www.lotus.com/

Product  URL: http://www.lotus.com/home.nsf/welcome/dominomailserver

Copyright VIGILANTe 2000-08-11



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