=========================================================================Ubuntu Security Notice USN-3927-1
March 28, 2019

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

- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Thunderbird.

Software Description:
- thunderbird: Mozilla Open Source mail and newsgroup client

Details:

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 versions:

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

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

References:
  https://ubuntu.com/security/notices/USN-3927-1
  CVE-2018-18506, CVE-2019-9788, CVE-2019-9790, CVE-2019-9791,
  CVE-2019-9792, CVE-2019-9793, CVE-2019-9795, CVE-2019-9796,
  CVE-2019-9810, CVE-2019-9813

Package Information:
 
https://launchpad.net/ubuntu/+source/thunderbird/1:60.6.1+build2-0ubuntu0.18.10.1
 
https://launchpad.net/ubuntu/+source/thunderbird/1:60.6.1+build2-0ubuntu0.18.04.1
 
https://launchpad.net/ubuntu/+source/thunderbird/1:60.6.1+build2-0ubuntu0.16.04.1
 
https://launchpad.net/ubuntu/+source/thunderbird/1:60.6.1+build2-0ubuntu0.14.04.1