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             AUSCERT External Security Bulletin Redistribution

                               ESB-2011.0126
  Novell eDirectory Malformed NCP Request Denial of Service Vulnerability
                              8 February 2011

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Novell eDirectory
Publisher:         Zero Day Initiative
Operating System:  Windows
                   Netware
                   Linux variants
                   AIX
                   Solaris
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-4327  

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

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Novell eDirectory Malformed NCP Request Denial of Service Vulnerability

   ZDI-11-060: February 7th, 2011

CVE ID

   CVE-2010-4327

CVSS Score

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

Affected Vendors

   Novell

Affected Products

   eDirectory

TippingPoint(TM) IPS Customer Protection

   TippingPoint IPS customers are protected against this vulnerability by
   Digital Vaccine protection filter ID 8275. For further product
   information on the TippingPoint IPS:
   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 - Coordinated public release of advisory

Credit

   This vulnerability was discovered by:
   1c239c43f521145fa8385d64a9c32243

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