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                         AUSCERT Security Bulletin

                               ASB-2009.1151
          Vulnerabilities in the PDF distiller of the BlackBerry
          Attachment Service for the BlackBerry Enterprise Server
                              2 December 2009

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

Product:              BlackBerry Enterprise Server
Operating System:     Windows
Impact/Access:        Execute Arbitrary Code/Commands -- Remote with User Interaction
                      Denial of Service               -- Remote with User Interaction
Resolution:           Patch/Upgrade
Member content until: Friday, January  1 2010

OVERVIEW

        A vulnerability has been found in the PDF distiller of the BlackBerry
        Attachment Service for the BlackBerry Enterprise Server which may lead
        to the execution of arbitrary code or a denial of service.


IMPACT

        The vendor has provided the following information regarding this
        vulnerability:
        
        "Multiple security vulnerabilities exist in the PDF distiller of some
        released versions of the BlackBerry Attachment Service component of
        the BlackBerry Enterprise Server. These vulnerabilities could enable
        a malicious individual to send an email message containing a specially
        crafted PDF file, which when opened for viewing on a BlackBerry
        smartphone that is associated with a user account on a BlackBerry
        Enterprise Server, could cause memory corruption and possibly lead to
        a Denial of Service (DoS) condition or arbitrary code execution on the
        computer that hosts the BlackBerry Attachment Service component of that
        BlackBerry Enterprise Server." [1]


MITIGATION

        Updates and interim fixes are available for following versions:
        
        * BlackBerry Enterprise Server version 5.0 for Microsoft Exchange and
          IBM Lotus Notes [2]
        
        * BlackBerry Enterprise Server versions 4.1.7 and 4.1.6 for Microsoft
          Exchange and IBM Lotus Domino [2]
        
        * BlackBerry Enterprise Server version 4.1.6 for Novell GroupWise [2]
        
        * BlackBerry Enterprise Server version 4.1.4 [2]
        
        * BlackBerry Professional Software [3]
        
        The vendor has also provided workarounds to prevent the BlackBerry
        Attachment Service from processing PDF files in a BlackBerry 
        Enterprise Server environment . [1]


REFERENCES

        [1] Vulnerabilities in the PDF distiller of the BlackBerry Attachment
            Service for the BlackBerry Enterprise Server
            http://www.blackberry.com/btsc/search.do?cmd=displayKC&docType=kc&externalId=KB19860

        [2] Software Download for BlackBerry Enterprise Server
            http://www.blackberry.com/go/serverdownloads

        [3] Downloads - BlackBerry Professional Software
            http://na.blackberry.com/eng/support/downloads/#tab_professional

AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours 
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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