Ubuntu Security Notice 850-1 – It was discovered that poppler contained multiple security issues when parsing malformed PDF documents. If a user or automated system were tricked into opening a crafted PDF file, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/82106/USN-850-1.txt
Source: https://packetstormsecurity.com/files/82106/Ubuntu-Security-Notice-850-1.html