This indicates an attack attempt to exploit a Remote Code Injection vulnerability in Advance Package Tool(APT) in Linux.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application when handling a crafted HTTP redirect. A remote attacker may be able to exploit this to injection malicious content in to a targeted system.
APT versions 1.4.8 and earlier
System Compromise: Remote attackers can gain control of vulnerable systems.
Refer to the your operation system's advisory for updates: