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             AUSCERT External Security Bulletin Redistribution

                  USN-3927-1: Thunderbird vulnerabilities
                               29 March 2019


        AusCERT Security Bulletin Summary

Product:           Thunderbird
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
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-9813 CVE-2019-9810 CVE-2019-9796
                   CVE-2019-9795 CVE-2019-9793 CVE-2019-9792
                   CVE-2019-9791 CVE-2019-9790 CVE-2019-9788

Reference:         ASB-2019.0087

Original Bulletin: 

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

USN-3927-1: Thunderbird vulnerabilities

28 March 2019

thunderbird vulnerabilities

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

  o Ubuntu 18.10
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS
  o Ubuntu 14.04 LTS


Several security issues were fixed in Thunderbird.

Software Description

  o thunderbird - Mozilla Open Source mail and newsgroup client


It was discovered that Thunderbird allowed PAC files to specify that requests
to localhost are sent through the proxy to another server. If proxy
auto-detection is enabled, an attacker could potentially exploit this to
conduct attacks on local services and tools. (CVE-2018-18506)

Multiple security issues were discovered in Thunderbird. If a user were tricked
in to opening a specially crafted website in a browsing context, an attacker
could potentially exploit these to cause a denial of service, or execute
arbitrary code. (CVE-2019-9788, CVE-2019-9790, CVE-2019-9791, CVE-2019-9792,
CVE-2019-9795, CVE-2019-9796, CVE-2019-9810, CVE-2019-9813)

A mechanism was discovered that removes some bounds checking for string, array,
or typed array accesses if Spectre mitigations have been disabled. If a user
were tricked in to opening a specially crafted website in a browsing context
with Spectre mitigations disabled, an attacker could potentially exploit this
to cause a denial of service, or execute arbitrary code. (CVE-2019-9793)

Update instructions

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

Ubuntu 18.10
    thunderbird - 1:60.6.1+build2-0ubuntu0.18.10.1
Ubuntu 18.04 LTS
    thunderbird - 1:60.6.1+build2-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
    thunderbird - 1:60.6.1+build2-0ubuntu0.16.04.1
Ubuntu 14.04 LTS
    thunderbird - 1:60.6.1+build2-0ubuntu0.14.04.1

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

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


  o CVE-2018-18506
  o CVE-2019-9788
  o CVE-2019-9790
  o CVE-2019-9791
  o CVE-2019-9792
  o CVE-2019-9793
  o CVE-2019-9795
  o CVE-2019-9796
  o CVE-2019-9810
  o CVE-2019-9813

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