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                         AUSCERT Security Bulletin

                               ASB-2016.0012
    A number of vulnerabilities have been identified in Mozilla Firefox
                             15 February 2016

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

Product:              Mozilla Firefox
                      Mozilla Firefox ESR
Operating System:     Android
                      Windows
                      UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Execute Arbitrary Code/Commands -- Remote with User Interaction
                      Provide Misleading Information  -- Remote with User Interaction
                      Access Confidential Data        -- Remote with User Interaction
Resolution:           Patch/Upgrade
CVE Names:            CVE-2016-1949 CVE-2016-1523 
Member content until: Wednesday, March 16 2016

OVERVIEW

        A number of vulnerabilities have been identified in Mozilla Firefox ESR
        prior to 38.6.1 and Firefox 44.0.2. [1-2]


IMPACT

        The vendor has provided the following information:
        
        CVE-2016-1949: "Jason Pang of OneSignal reported that service 
        workers intercept responses to plugin network requests made through
        the browser. Plugins which make security decisions based on the 
        content of network requests can have these decisions subverted if a
        service worker forges responses to those requests. For example, a 
        forged crossdomain.xml could allow a malicious site to violate the 
        same-origin policy using the Flash plugin." [1]
        
        CVE-2016-1523: "Security researcher Holger Fuhrmannek reported that
        a malicious Graphite "smart font" could circumvent the validation of
        internal instruction parameters in the Graphite 2 library using 
        special CNTXT_ITEM instructions. This could result in arbitrary code
        execution. This issue affected Graphite 2 version 1.2.4, which was 
        used in the Firefox ESR branch. To address this issue and other 
        security vulnerabilities recently disclosed by Cisco Talos affecting
        this version of the library, Firefox ESR has been updated to version
        1.3.5, the same one used in Firefox 44." [2]


MITIGATION

        The vendor recommends updating to the latest version. [1-2]


REFERENCES

        [1] Mozilla Foundation Security Advisory 2016-13
            https://www.mozilla.org/en-US/security/advisories/mfsa2016-13/

        [2] Mozilla Foundation Security Advisory 2016-14
            https://www.mozilla.org/en-US/security/advisories/mfsa2016-14/

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.

===========================================================================
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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