USN-3793-1: Thunderbird vulnerabilities

15 October 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, CVE-2018-12378)

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. (CVE-2018-12385)

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

To update your system, please follow these instructions:

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