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AA-2009.0069                  AUSCERT Advisory

                             [Win][UNIX/Linux]
                  Mozilla Firefox: Execute Arbitrary Code
                               27 March 2009
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        AusCERT Advisory Summary
        ------------------------

Product:              Firefox
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact:               Execute Arbitrary Code/Commands
                      Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2009-1169
Member content until: Friday, April 24 2009

OVERVIEW:

       A vulnerability has been discovered in Firefox which affects the
       latest and possibly prior versions.


IMPACT:

       Successful exploitation of this vulnerability can result in the 
       execution of arbitrary code in the context of the current user.

       An exploit for the vulnerability that results in a Denial of Service
       (DoS) has been made public. CVE-2009-1169 has been assigned to this
       vulnerability which is described as:

       "The txMozillaXSLTProcessor::TransformToDoc function in Mozilla 
       Firefox 3.0.7 and earlier allows remote attackers to cause a denial 
       of service (crash) via an XML file with a crafted XSLT transform."
       [1]


MITIGATION:

       Mozilla has confirmed this vulnerability [2] and plans to release
       a patch on April 1st 2009. [3]


REFERENCES:

       [1] Vulnerability Summary for CVE-2009-1169 
           http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-1169

       [2] Exploitable crash in [@txMozillaXSLTProcessor::TransformToDoc] 
           https://bugzilla.mozilla.org/show_bug.cgi?id=485217

       [3] Releases/Firefox 3.0.8
           https://wiki.mozilla.org/Releases/Firefox_3.0.8#Bug_Queries

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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