[USN-3793-1] Thunderbird vulnerabilities

Chris Coulson chris.coulson at canonical.com
Mon Oct 15 21:30:00 UTC 2018

Ubuntu Security Notice USN-3793-1
October 15, 2018

thunderbird vulnerabilities

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

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


Several security issues were fixed in Thunderbird.

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


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-2018-12376, CVE-2018-12377,

It was discovered that if a user saved passwords before Thunderbird 58 and
then later set a master password, an unencrypted copy of these passwords
would still be accessible. A local user could exploit this to obtain
sensitive information. (CVE-2018-12383)

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.

Update instructions:

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

Ubuntu 18.04 LTS:
  thunderbird                     1:60.2.1+build1-0ubuntu0.18.04.2

Ubuntu 16.04 LTS:
  thunderbird                     1:60.2.1+build1-0ubuntu0.16.04.4

Ubuntu 14.04 LTS:
  thunderbird                     1:60.2.1+build1-0ubuntu0.14.04.2

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

  CVE-2018-12376, CVE-2018-12377, CVE-2018-12378, CVE-2018-12383,

Package Information:

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