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                         AUSCERT Security Bulletin

                               ASB-2010.0180
     Dangling pointer crash regression from plugin parameter array fix
                               26 July 2010

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

Product:              Firefox
Operating System:     Windows
                      UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Execute Arbitrary Code/Commands -- Remote with User Interaction
                      Denial of Service               -- Remote with User Interaction
Resolution:           Patch/Upgrade
CVE Names:            CVE-2010-2755  
Member content until: Wednesday, August 25 2010

OVERVIEW

        Mozilla has released version 3.6.8 of the Firefox web browser,
        correcting a denial of service vulnerability.


IMPACT

        The vendor has supplied the following information regarding this 
        vulnerability:
        
        CVE-2010-2755
        
        "Mozilla developer Daniel Holbert reported that the fix to the 
        plugin parameter array crash that was fixed in Firefox 3.6.7 caused
        a crash showing signs of memory corruption. In certain 
        circumstances, properties in the plugin instance's parameter array 
        could be freed prematurely leaving a dangling pointer that the 
        plugin could execute, potentially calling into attacker-controlled 
        memory." [1]


MITIGATION

        It is recommended that users of Firefox upgrade to version 3.6.8.


REFERENCES

        [1] Mozilla Foundation Security Advisory 2010-48
            http://www.mozilla.org/security/announce/2010/mfsa2010-48.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.

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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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