ESB-2018.2985 - [Ubuntu] firefox: Multiple vulnerabilities 2018-10-04

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             AUSCERT External Security Bulletin Redistribution

                          Firefox vulnerabilities
                              4 October 2018


        AusCERT Security Bulletin Summary

Product:           firefox
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-12387 CVE-2018-12386 CVE-2018-12385

Reference:         ASB-2018.0227

Original Bulletin:

- --------------------------BEGIN INCLUDED TEXT--------------------

USN-3778-1: Firefox vulnerabilities

3 October 2018

firefox vulnerabilities

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

  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS
  o Ubuntu 14.04 LTS


Firefox could be made to crash or run programs as your login if it opened a
malicious website.

Software Description

  o firefox - Mozilla Open Source web browser


A crash was discovered in TransportSecurityInfo used for SSL, which could be
triggered by data stored in the local cache directory. An attacker could
potentially exploit this in combination with another vulnerability that allowed
them to write data to the cache, to execute arbitrary code. (CVE-2018-12385)

A type confusion bug was discovered in JavaScript. If a user were tricked in to
opening a specially crafted website, an attacker could exploit this to cause a
denial of service, or execute arbitrary code. (CVE-2018-12386)

It was discovered that the Array.prototype.push could leak memory addresses to
the calling function in some circumstances. An attacker could exploit this in
combination with another vulnerability to help execute arbitrary code.

Update instructions

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

Ubuntu 18.04 LTS
    firefox - 62.0.3+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
    firefox - 62.0.3+build1-0ubuntu0.16.04.2
Ubuntu 14.04 LTS
    firefox - 62.0.3+build1-0ubuntu0.14.04.2

To update your system, please follow these instructions: https://

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


  o CVE-2018-12385
  o CVE-2018-12386
  o CVE-2018-12387

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