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AA-2009.0074                  AUSCERT Advisory

                                   [Win]
           [Windows Services for UNIX, Subsystem for UNIX-based
                   Applications]: Execute Arbitrary Code
                               3 April 2009
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        AusCERT Advisory Summary
        ------------------------

Product:              Microsoft Windows Services for UNIX 3.x
Operating System:     Windows Server 2008
                      Windows Vista
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2009-1216
Member content until: Tuesday, April 28 2009

Revision History:     April  3 2009: Added CVE
                      March 31 2009: Initial Release

OVERVIEW:

        Gzip libraries in Windows Services for UNIX contain vulnerabilities
        that could allow for execution of malicious code.


IMPACT:

        "On a Windows Server 2008-based computer or on a computer that has
        Windows Services for UNIX and the Subsystem for UNIX-based
        Applications (SUA) installed, the following gzip libraries contain
        vulnerabilities that could allow for execution of malicious code:

        * unlzh.c
        * unpack.c" [1]


MITIGATION:

        Vendor has provided a hotfix only for systems which are affected
        and recommends to wait until next software update if you are not
        effected. [1]


REFERENCES:

        [1] Vulnerabilities in Windows Services for UNIX and the Subsystem
            for UNIX-based Applications (SUA) could allow for remote code
            execution

            http://support.microsoft.com/kb/953602

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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