[NEWS] Netware DHCP Server Contains a DoS Vulnerability

From: support@securiteam.com
Date: 06/27/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Thu, 27 Jun 2002 19:13:34 +0200 (CEST)

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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
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  • 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)