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             AUSCERT External Security Bulletin Redistribution

                    USN-4383-1: Firefox vulnerabilities
                                5 June 2020


        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
                   Provide Misleading Information  -- Remote with User Interaction
                   Access Confidential Data        -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-12411 CVE-2020-12410 CVE-2020-12409
                   CVE-2020-12408 CVE-2020-12407 CVE-2020-12406
                   CVE-2020-12405 CVE-2020-12399 

Reference:         ESB-2020.1934

Original Bulletin: 

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

USN-4383-1: Firefox vulnerabilities
4 June 2020

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

  o Ubuntu 20.04 LTS
  o Ubuntu 19.10
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 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


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 cause a denial of service, spoof the addressbar, or execute arbitrary
code. (CVE-2020-12405, CVE-2020-12406, CVE-2020-12407, CVE-2020-12408,
CVE-2020-12409, CVE-2020-12410, CVE-2020-12411)

It was discovered that NSS showed timing differences when performing DSA
signatures. An attacker could potentially exploit this to obtain private keys
using a timing attack. (CVE-2020-12399)

Update instructions

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

Ubuntu 20.04 LTS
    firefox - 77.0.1+build1-0ubuntu0.20.04.1
Ubuntu 19.10
    firefox - 77.0.1+build1-0ubuntu0.19.10.1
Ubuntu 18.04 LTS
    firefox - 77.0.1+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
    firefox - 77.0.1+build1-0ubuntu0.16.04.1

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

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


  o CVE-2020-12399
  o CVE-2020-12405
  o CVE-2020-12406
  o CVE-2020-12407
  o CVE-2020-12408
  o CVE-2020-12409
  o CVE-2020-12410
  o CVE-2020-12411

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