ZDI-11-060: Novell eDirectory Malformed NCP Request Denial of Service Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-060

February 7, 2011

-- CVE ID:
CVE-2010-4327

-- CVSS:
9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)

-- 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 8275. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows attackers to deny services on vulnerable
installations of Novell eDirectory. Authentication is not required in
order to trigger this vulnerability.

The flaw exists within Novell's eDirectory Server's NCP implementation.
Novell's eDirectory Server binds to port 524 for processing NCP
requests. When the application processes a malformed FileSetLock
request, the service will become unresponsive resulting in an inability
to authenticate to that server.

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

http://www.novell.com/support/viewContent.do?externalId=7007781&sliceId=2

-- Disclosure Timeline:
2009-03-26 - Vulnerability reported to vendor
2011-02-07 - Public release of advisory

-- Credit:
This vulnerability was discovered by:
    * 1c239c43f521145fa8385d64a9c32243

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