ESB-2018.0136 - [Win][UNIX/Linux][Ubuntu] libjavascriptcoregtk-4.0-18: Access privileged data - Remote with user interaction 2018-01-12

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.0136
                        WebKitGTK+ vulnerabilities
                              12 January 2018

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

Product:           libjavascriptcoregtk-4.0-18
Publisher:         Ubuntu
Operating System:  Ubuntu
                   Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Access Privileged Data -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-5753 CVE-2017-5715 

Reference:         ASB-2018.0009
                   ASB-2018.0002.4
                   ESB-2018.0118
                   ESB-2018.0046
                   ESB-2018.0044
                   ESB-2018.0042

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3530-1

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running libjavascriptcoregtk-4.0-18 check for an updated version of
         the software for their operating system.

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USN-3530-1: WebKitGTK+ vulnerabilities
Ubuntu Security Notice USN-3530-1

11th January, 2018
webkit2gtk vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

    Ubuntu 17.10
    Ubuntu 17.04
    Ubuntu 16.04 LTS

Summary

WebKitGTK+ could be made to expose sensitive information.
Software description

    webkit2gtk - Web content engine library for GTK+

Details

It was discovered that speculative execution performed by modern CPUs
could leak information through a timing side-channel attack, and that
this could be exploited in web browser JavaScript engines. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit this to obtain sensitive information from other
domains, bypassing same-origin restrictions. (CVE-2017-5753, CVE-2017-5715)
Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 17.10:
    libwebkit2gtk-4.0-37 2.18.5-0ubuntu0.17.10.1 
    libjavascriptcoregtk-4.0-18 2.18.5-0ubuntu0.17.10.1 
Ubuntu 17.04:
    libwebkit2gtk-4.0-37 2.18.5-0ubuntu0.17.04.1 
    libjavascriptcoregtk-4.0-18 2.18.5-0ubuntu0.17.04.1 
Ubuntu 16.04 LTS:
    libwebkit2gtk-4.0-37 2.18.5-0ubuntu0.16.04.1 
    libjavascriptcoregtk-4.0-18 2.18.5-0ubuntu0.16.04.1 

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use WebKitGTK+, such as Epiphany, to make all the necessary changes.
References

CVE-2017-5715, CVE-2017-5753

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