ASB-2018.0304 - [Win][UNIX/Linux][BSD] Mozilla Firefox: Multiple vulnerabilities 2018-12-12

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===========================================================================
                         AUSCERT Security Bulletin

                               ASB-2018.0304
                       Firefox 64 security released
                             12 December 2018

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

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

Product:              Mozilla Firefox
Operating System:     Windows
                      UNIX variants (UNIX, Linux, OSX)
                      BSD variants
Impact/Access:        Execute Arbitrary Code/Commands -- Remote with User Interaction
                      Denial of Service               -- Remote with User Interaction
                      Access Confidential Data        -- Remote with User Interaction
                      Unauthorised Access             -- Remote with User Interaction
Resolution:           Patch/Upgrade
CVE Names:            CVE-2018-18498 CVE-2018-18497 CVE-2018-18496
                      CVE-2018-18495 CVE-2018-18494 CVE-2018-18493
                      CVE-2018-18492 CVE-2018-17466 CVE-2018-12407
                      CVE-2018-12406 CVE-2018-12405 
Member content until: Friday, January 11 2019

OVERVIEW

        Mozilla have released Firefox 64 with multiple security fixes. [1]


IMPACT

        Mozilla advises that the following vulnerabilities have been
        addressed:
        
        "# CVE-2018-12407: Buffer overflow with ANGLE library when using VertexBuffer11
        module
        
        Reporter: Omair working with iDefense Labs
        Impact: high
        
        Description
        
        A buffer overflow occurs when drawing and validating elements with the ANGLE
        graphics library, used for WebGL content, when working with the VertexBuffer11
        module. This results in a potentially exploitable crash.
        
        # CVE-2018-17466: Buffer overflow and out-of-bounds read in ANGLE library with
        TextureStorage11
        
        Reporter: Omair
        Impact: high
        
        Description
        
        A buffer overflow and out-of-bounds read can occur in TextureStorage11 within
        the ANGLE graphics library, used for WebGL content. This results in a
        potentially exploitable crash.
        
        # CVE-2018-18492: Use-after-free with select element
        
        Reporter: Nils
        Impact: high
        
        Description
        
        A use-after-free vulnerability can occur after deleting a selection element due
        to a weak reference to the select element in the options collection. This
        results in a potentially exploitable crash.
        
        # CVE-2018-18493: Buffer overflow in accelerated 2D canvas with Skia
        
        Reporter: Atte Kettunen
        Impact: high
        
        Description
        
        A buffer overflow can occur in the Skia library during buffer offset
        calculations with hardware accelerated canvas 2D actions due to the use of
        32-bit calculations instead of 64-bit. This results in a potentially
        exploitable crash.
        
        # CVE-2018-18494: Same-origin policy violation using location attribute and
        performance.getEntries to steal cross-origin URLs
        
        Reporter: James Lee of Kryptos Logic
        Impact: high
        
        Description
        
        A same-origin policy violation allowing the theft of cross-origin URL entries
        when using the Javascript location property to cause a redirection to another
        site using performance.getEntries(). This is a same-origin policy violation and
        could allow for data theft.
        
        # CVE-2018-18495: WebExtension content scripts can be loaded in about: pages
        
        Reporter: Kestrel
        Impact: moderate
        
        Description
        
        WebExtension content scripts can be loaded into about: pages in some
        circumstances, in violation of the permissions granted to extensions. This
        could allow an extension to interfere with the loading and usage of these pages
        and use capabilities that were intended to be restricted from extensions.
        
        # CVE-2018-18496: Embedded feed preview page can be abused for clickjacking
        
        Reporter: Abdulrahman Alqabandi
        Impact: moderate
        
        Description
        
        When the RSS Feed preview about:feeds page is framed within another page, it
        can be used in concert with scripted content for a clickjacking attack that
        confuses users into downloading and executing an executable file from a
        temporary directory.
        Note: This issue only affects Windows operating systems. Other operating
        systems are not affected.
        
        # CVE-2018-18497: WebExtensions can load arbitrary URLs through pipe separators
        
        Reporter: Rob Wu
        Impact: moderate
        
        Description
        
        Limitations on the URIs allowed to WebExtensions by the browser.windows.create
        API can be bypassed when a pipe in the URL field is used within the extension
        to load multiple pages as a single argument. This could allow a malicious
        WebExtension to opened privileged about: or file: locations.
        
        # CVE-2018-18498: Integer overflow when calculating buffer sizes for images
        
        Reporter: r [sic]
        Impact: low
        
        Description
        
        A potential vulnerability leading to an integer overflow can occur during
        buffer size calculations for images when a raw value is used instead of the
        checked value. This can lead to an out-of-bounds write.
        
        # CVE-2018-12406: Memory safety bugs fixed in Firefox 64
        
        Reporter: Mozilla developers and community
        Impact: critical
        
        Description
        
        Mozilla developers and community members Alex Gaynor, Andr? Bargull, Boris
        Zbarsky, Christian Holler, Jan de Mooij, Jason Kratzer, Jed Davis, Philipp,
        Ronald Crane, Natalia Csoregi, and Paul Theriault reported memory safety bugs
        present in Firefox 63. Some of these bugs showed evidence of memory corruption
        and we presume that with enough effort that some of these could be exploited to
        run arbitrary code.
        
        # CVE-2018-12405: Memory safety bugs fixed in Firefox 64 and Firefox ESR 60.4
        
        Reporter: Mozilla developers and community
        Impact: critical
        
        Description
        
        Mozilla developers and community members Christian Holler, Diego Calleja,
        Andrew McCreight, Jon Coppeard, Natalia Csoregi, Nicolas B. Pierron, and Tyson
        Smith reported memory safety bugs present in Firefox 63 and Firefox ESR 60.3.
        Some of these bugs showed evidence of memory corruption and we presume that
        with enough effort that some of these could be exploited to run arbitrary code."
        [1]


MITIGATION

        Mozilla advises updating to Firefox version 64 to address these
        vulnerabilities. [1]


REFERENCES

        [1] Mozilla Foundation Security Advisory 2018-29
            https://www.mozilla.org/en-US/security/advisories/mfsa2018-29/

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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