Ubuntu Security Notice 530-1 – It was discovered that the hpssd tool of hplip did not correctly handle shell meta-characters. A local attacker could exploit this to execute arbitrary commands as the hplip user.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/60067/USN-530-1.txt
Source: https://packetstormsecurity.com/files/60067/Ubuntu-Security-Notice-530-1.html