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Subject: Advisory Code: VIGILANTE-2000011 Lotus Domino ESMTP Service Buffer overflow
From: erik damsgaard (erik.damsgaardVIGILANTE.CON)
Date: Mon Sep 11 2000 - 03:15:25 CDT

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.

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
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
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