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AusCERT Update AU-2004.0013 - Microsoft MS04-028
JPEG exploit proof of concept release
23 September 2004

        AusCERT Update Summary
        ----------------------

Product:                various products/components of Microsoft Windows
Operating System:       Windows
Impact:                 Execute Arbitrary Code/Commands
                        Denial of Service
Access:                 Remote/Unauthenticated
CVE Names:              CAN-2004-0200

Ref:                    AL-2004.030
                        ESB-2004.0570

Further to the JPEG denial of service proof of concept described in AusCERT
Alert AL-2004.030, a second proof of concept has been released allowing 
execution of arbitrary commands on viewing a specially crafted JPEG file.

AusCERT has confirmed that under Windows XP prior to Service Pack 2, a JPEG
containing this exploit will launch a named process when viewing the file or 
viewing a folder containing such a file under default Windows Explorer settings.
AusCERT cannot confirm if command execution will occur after viewing such a
JPEG in Internet Explorer or a mail client such as Outlook, but will be
investigating further.

With confirmation that JPEG files are able to execute code on unpatched systems,
AusCERT again advises following the steps outlined by Microsoft as a high
priority.  AusCERT expects to see widespread use of this exploit soon due to
the ubiquity of JPEG files and ease of adaption of the proof of exploit code
that has been released.

http://www.microsoft.com/technet/security/bulletin/MS04-028.mspx

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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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