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                         AUSCERT Security Bulletin

                               ASB-2010.0099
     Microsoft Bulletin Notification - April Pre-release Announcement
                               13 April 2010

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

Product:              Microsoft Windows
                      Microsoft Office
                      Microsoft Exchange
Operating System:     Windows
Impact/Access:        Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                      Increased Privileges            -- Existing Account      
                      Denial of Service               -- Remote/Unauthenticated
                      Provide Misleading Information  -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
Member content until: Thursday, May 13 2010

OVERVIEW

        Microsoft will be releasing critical security patches for April
        for their products on Wednesday 14 April 2010 at:
                        
           4:00 am AEST (ACT, NSW, Queensland, Tasmania, Victoria)
           3:30 am ACST (NT, SA)
           2:00 am AWST (WA)
                        
        Further details are available from the Microsoft web site. [1,2]


IMPACT

        Microsoft will be releasing eleven security bulletins:
        
        Critical:
                   - Five for Microsoft Windows
        
        Important:
                   - Two for Microsoft Windows
                   - Two for Microsoft Office
                   - One for Microsoft Windows and Microsoft Exchange
        
        Moderate:
                   - One for Microsoft Windows


MITIGATION

        AusCERT advises that system administrators consider patching their
        machines as quickly as possible following their release by Microsoft.
        Bulletin information will be available from the Microsoft web site
        soon after their release, and AusCERT will be distributing bulletins
        to AusCERT members on Wednesday.
                        
        Historically, exploits targeting Microsoft vulnerabilities are
        released in the days immediately following their announcement, so it
        is critical that system administrators apply patches or mitigate
        vulnerabilities as quickly as possible.


REFERENCES

        [1] Microsoft Security Bulletin Advance Notification
            http://www.microsoft.com/technet/security/Bulletin/advance.mspx

        [2] Microsoft Security Bulletin Advance Notification for April 2010
            http://www.microsoft.com/technet/security/Bulletin/MS10-apr.mspx

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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