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             AUSCERT External Security Bulletin Redistribution

                               ESB-2011.0089
          Novell GroupWise Internet Agent REQUEST-STATUS Parsing
                    Remote Code Execution Vulnerability
                              27 January 2011

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

Product:           Novell GroupWise Internet Agent
Publisher:         Zero Day Initiative
Operating System:  Windows
                   Netware
                   Linux variants
Impact/Access:     Administrator Compromise -- Remote/Unauthenticated
                   Root Compromise          -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-4326  

Original Bulletin: 
   http://www.zerodayinitiative.com/advisories/ZDI-11-025/

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Novell GroupWise Internet Agent REQUEST-STATUS Parsing Remote Code Execution 
Vulnerability
ZDI-11-025: January 25th, 2011

CVE ID

      CVE-2010-4326 

CVSS Score

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

Affected Vendors

      Novell

Affected Products

      Groupwise

TippingPoint IPS Customer Protection
TippingPoint IPS customers are protected against this vulnerability by Digital 
Vaccine protection filter ID 10788. For further product information on the 
TippingPoint IPS:

      http://www.tippingpoint.com 

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on 
vulnerable installations of Novell GroupWise. Authentication is not required to 
exploit this vulnerability.

The specific flaw exists within the gwwww1.dll module responsible for parsing 
VCALENDAR data within e-mail messages. When the code encounters a REQUEST-
STATUS variable it allocates up to 0xFFFF bytes for the variable's value. It 
then proceeds to copy the value into the fixed-length buffer without checking 
if it will fit. By specifying a large enough string in the e-mail, an attacker 
can overflow the buffer and execute arbitrary code under the context of the 
SYSTEM user.

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

      http://www.novell.com/support/search.do?cmd=displayKC&docType=kc&externalId=7007155&sliceId=1&docTypeID=DT_TID_1_1&dialogID=199990003&stateId=0%200%20199988016

Disclosure Timeline

      2010-09-24 - Vulnerability reported to vendor
      2011-01-25 - Coordinated public release of advisory

Credit
This vulnerability was discovered by:

      Anonymous

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