Date: Wed, 8 Oct 2008 17:33:44 -0400
From: zdi-disclosures@...m.com
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: ZDI-08-066: Novell eDirectory Core Protocol
 Opcode 0x24 Heap Overflow Vulnerability

ZDI-08-066: Novell eDirectory Core Protocol Opcode 0x24 Heap Overflow 
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-08-066
October 8, 2008

-- CVE ID:
CVE-2008-4480

-- Affected Vendors:
Novell

-- Affected Products:
Novell eDirectory

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 6177. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Novell eDirectory Server. Authentication is
not required to exploit this vulnerability.

The specific flaw exists within dhost.exe, the service responsible for
directory replication which is bound by default to TCP port 524.
Improper parsing within opcode 0x24 via the Netware Core Protocol can
result in an arithmetic calculation based on supplied user-input
resulting in an under-allocated heap buffer. This fault can be leveraged
to result in arbitrary code execution.

-- Vendor Response:
Novell has issued an update to correct this vulnerability. More
details can be found at:

http://www.novell.com/support/php/search.do?cmd=displayKC&docType=kc&externalId=7001183&sliceId=1&docTypeID=DT_TID_1_1&dialogID=78066829&stateId=0%200%2078062953

-- Disclosure Timeline:
2008-05-19 - Vulnerability reported to vendor
2008-10-08 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Sebastian Apelt (webmaster@...zworld.org)

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