USN-3837-1 introduced a regression in poppler.
USN-3837-1 fixed vulnerabilities in poppler. A regression was reported regarding the previous update. This update fixes the problem.
11 December 2018
A security issue affects these releases of Ubuntu and its derivatives:
USN-3837-1 introduced a regression in poppler.
USN-3837-1 fixed vulnerabilities in poppler. A regression was reported regarding the previous update. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
It was discovered that poppler incorrectly handled certain PDF files. An attacker could possibly use this issue to cause a denial of service. (CVE-2018-16646)
It was discovered that poppler incorrectly handled certain PDF files. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS. (CVE-2018-19149)
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.