[NEWS] Netware DHCP Server Contains a DoS Vulnerability
From: support@securiteam.comDate: 06/27/02
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From: support@securiteam.com To: list@securiteam.com Date: Thu, 27 Jun 2002 19:13:34 +0200 (CEST)
The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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Netware DHCP Server Contains a DoS Vulnerability
------------------------------------------------------------------------
SUMMARY
An attacker could cause the Netware server to reboot, simple by issuing a
"non-standard" DHCP request.
DETAILS
Vulnerable systems:
* Netware version 6.0 with SP 1
The DHCP server suffers from multiple buffer overflows that can be
triggered by sending oversized "non-standard" requests to the DHCP server.
ADDITIONAL INFORMATION
The information has been provided by <mailto:patrik@cqure.net> Patrik
Karlsson.
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Relevant Pages
- Re: dhcp / giaddr / configuration for giaddr update
... how does the dhcp server know which subnet a dhcp request ... packet
or the router interface that the packet is forwarded through? ... forwarded through several
routers before reaching the dhcp server" ... (comp.dcom.sys.cisco) - Re: Classic DHCP over bridge problem
... > shouldn't confuse the DHCP server. ... DHCP request doesn't contain
a filled-in hardware address field? ... so it's got to be looking at the Ethernet MAC ...
A real hardware Ethernet bridge would retain the MAC address, ... (comp.os.linux.networking) - Re: Win2003 DHCP
... the DHCP server will see from what network the request is coming (from a ...
special field in the DHCP request) and will give the IP address according to ... server,
but the thing is now, this one DHCP server has to assing IP ... Setting up the scopes
and all that is done, but now how do I ensure that ... (microsoft.public.windows.server.networking) - DHCP server not responding
... The telephone sends out a DHCP request. ... The DHCP relay agent redirects
the request to the DHCP server on the other VLAN, but the DHCP server simply ignores these
requests and never sends out a reply/lease. ... (microsoft.public.windows.server.setup)