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                         AUSCERT Security Bulletin

                               ASB-2009.1064
   Sophos releases the new version of PureMessage for Microsoft Exchange
                              28 August 2009

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

Product:              PureMessage for Microsoft Exchange
Operating System:     Windows
Impact/Access:        Denial of Service -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2008-7106 CVE-2008-7105 CVE-2008-7104
Member content until: Sunday, September 27 2009

OVERVIEW

        Sophos have released PureMessage 3.0.2 for Microsoft Exchange
        correcting several security vulnerabilities.


IMPACT

        The vendor has provided the following information regarding the
        fixes in version 3.0.2:
        
        * "Fix for the Sophos PureMessage Scanner service (PMScanner.exe) 
          may terminate unexpectedly or hang while performing content 
          (phrase) scanning within rich text (RTF) or PDF files. As a 
          result, messages may get stuck in the queue and spam rule updates 
          may not complete." [1] 
        * "Fix for the following problem: On Exchange 2007, the process 
          EdgeTransport.exe may terminate unexpectedly when PureMessage 
          tries to replace the rich text body of certain TNEF-encoded 
          messages with plain text." [1]
        * "Fix for the following problem: On a PureMessage installation that 
          supports both anti-virus and anti-spam, PureMessage sometimes fails 
          to create (or invoke) the scan engines (spam, virus or content 
          scanning engines) when under heavy load." [1]


MITIGATION

        Sophos recommends users read the latest system requirements [2] 
        before downloading the new version from their website [3].


REFERENCES

        [1] Advisory: PureMessage for Microsoft Exchange, version 3.0, updating
            to version 3.0.2.
            http://www.sophos.com/support/knowledgebase/article/44385.html

        [2] Tech specs - PureMessage for Microsoft Exchange
            http://www.sophos.com/products/enterprise/email/security-and-control/microsoft-exchange/sysreqs.html

        [3] Sophos Downloads and Updates
            https://secure.sophos.com/support/updates/puremessage.html

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

===========================================================================
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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