Several security issues were fixed in Tex Live.
Jakub Wilk discovered that Tex Live incorrectly handled certain files. An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2015-5700)
11 October 2018
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in Tex Live.
Jakub Wilk discovered that Tex Live incorrectly handled certain files. An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2015-5700)
It was discovered that Tex Live incorrectly handled certain files. An attacker could possibly use this issue to execute arbitrary code. (CVE-2018-17407)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.