CVE-2018-18456 on Ubuntu 18.04 LTS (bionic) - medium.
Description:
The function Object::isName() in Object.h (called from Gfx::opSetFillColorN) in Xpdf 4.00 allows remote attackers to cause a denial of service (stack-based buffer over-read) via a crafted pdf file, as demonstrated by pdftoppm.