ESB-2017.2484.2 - UPDATE [Ubuntu] firefox: Multiple vulnerabilities 2017-10-05

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2017.2484.2
                          Firefox vulnerabilities
                              5 October 2017

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

Product:           firefox
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Increased Privileges            -- Remote with User Interaction
                   Cross-site Scripting            -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
                   Provide Misleading Information  -- Remote with User Interaction
                   Access Confidential Data        -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-7824 CVE-2017-7823 CVE-2017-7822
                   CVE-2017-7821 CVE-2017-7820 CVE-2017-7819
                   CVE-2017-7818 CVE-2017-7816 CVE-2017-7815
                   CVE-2017-7814 CVE-2017-7813 CVE-2017-7812
                   CVE-2017-7811 CVE-2017-7810 CVE-2017-7805
                   CVE-2017-7793  

Reference:         ASB-2017.0155
                   ESB-2017.2481
                   ESB-2017.2466
                   ESB-2017.2459
                   ESB-2017.2455

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3435-2

Revision History:  October 5 2017: USN-3435-1 caused Flash to crash in some 
                                   circumstances
                   October 3 2017: Initial Release

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Ubuntu Security Notice USN-3435-2
October 04, 2017

firefox regression
==========================================================================

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

- - Ubuntu 17.04
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

USN-3435-1 caused a regression in Firefox.

Software Description:
- - firefox: Mozilla Open Source web browser

Details:

USN-3435-1 fixed vulnerabilities in Firefox. The update caused the Flash
plugin to crash in some circumstances. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 Multiple security issues were discovered in Firefox. If a user were
 tricked in to opening a specially crafted website, an attacker could
 potentially exploit these to read uninitialized memory, obtain sensitive
 information, bypass phishing and malware protection, spoof the origin in
 modal dialogs, conduct cross-site scripting (XSS) attacks, cause a denial
 of service via application crash, or execute arbitrary code.
 (CVE-2017-7793, CVE-2017-7810, CVE-2017-7811, CVE-2017-7812,
 CVE-2017-7813, CVE-2017-7814, CVE-2017-7815, CVE-2017-7818, CVE-2017-7819,
 CVE-2017-7820, CVE-2017-7822, CVE-2017-7823, CVE-2017-7824)
 
 Martin Thomson discovered that NSS incorrectly generated handshake hashes.
 A remote attacker could potentially exploit this to cause a denial of
 service via application crash, or execute arbitrary code. (CVE-2017-7805)
 
 Multiple security issues were discovered in WebExtensions. If a user were
 tricked in to installing a specially crafted extension, an attacker could
 potentially exploit these to download and open non-executable files
 without interaction, or obtain elevated privileges. (CVE-2017-7816,
 CVE-2017-7821)

Update instructions:

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

Ubuntu 17.04:
  firefox                         56.0+build6-0ubuntu0.17.04.2

Ubuntu 16.04 LTS:
  firefox                         56.0+build6-0ubuntu0.16.04.2

Ubuntu 14.04 LTS:
  firefox                         56.0+build6-0ubuntu0.14.04.2

After a standard system update you need to restart Firefox to make
all the necessary changes.

References:
  https://www.ubuntu.com/usn/usn-3435-2
  https://www.ubuntu.com/usn/usn-3435-1
  https://launchpad.net/bugs/1720908

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/56.0+build6-0ubuntu0.17.04.2
  https://launchpad.net/ubuntu/+source/firefox/56.0+build6-0ubuntu0.16.04.2
  https://launchpad.net/ubuntu/+source/firefox/56.0+build6-0ubuntu0.14.04.2

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