IBM Lotus Domino SMTP server bounced message loop denial of service
| lotus-domino-bounced-message-dos (7012) |  Medium Risk |
Description:
Lotus Domino is vulnerable to a denial of service attack. A vulnerability in the SMTP server could allow a remote attacker to send a mail message with the sender set as "&bounce@ [127.0.0.1]" and the recipient set as being at a remote domain. This could cause the message to bounce and enter into an infinite loop, which would cause the system to consume 100% of the CPU resources. In order to regain normal functionality from such an attack, the server must be restarted and the message must be removed from the queue.
Platforms Affected:
- IBM, Lotus Domino 4.6.1
- IBM, Lotus Domino 4.6.3
- IBM, Lotus Domino 4.6.4
- IBM, Lotus Domino 5.0.1
- IBM, Lotus Domino 5.0.2
- IBM, Lotus Domino 5.0.3
- IBM, Lotus Domino 5.0.4
- IBM, Lotus Domino 5.0.5
- IBM, Lotus Domino 5.0.6
- IBM, Lotus Domino 5.0.7
- IBM, Lotus Domino 5.0.8
Remedy:
Install Domino 5.0.9 or a later version.
As a workaround, reference Lotus Technote 191746 to configure Domino to drop messages from users originating from 127.0.0.1. See References.
Consequences:
Denial of Service
References:
- BugTraq Mailing List, Mon Aug 20 2001 - 16:19:32 CDT, Lotus Domino DoS at http://archives.neohapsis.com/archives/bugtraq/2001-08/0280.html.
- BugTraq Mailing List, Tue Aug 21 2001 - 03:47:35 CDT, Re: Lotus Domino DoS at http://archives.neohapsis.com/archives/bugtraq/2001-08/0302.html.
- Lotus Technote 191746, Domino R5 SMTP "Denial of Service" Attack Caused by Routing Loop at http://www-1.ibm.com/support/docview.wss?rs=0&org=sims&doc=DA18AA221C3B982085256B84000033EB.
- BID-3212: Lotus Domino Mail Loop Denial of Service Vulnerability
- CVE-2000-1203: Lotus Domino SMTP server 4.63 through 5.08 allows remote attackers to cause a denial of service (CPU consumption) by forging an email message with the sender as bounce@[127.0.0.1] (localhost), which causes Domino to enter a mail loop.
Reported:
Aug 20, 2001
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