The DM Primer (dmprimer.exe) in the DM Deployment Common Component in Computer Associates (CA) BrightStor Mobile Backup r4.0, BrightStor ARCserve Backup for Laptops & Desktops r11.0, r11.1, r11.1 SP1, Unicenter Remote Control 6.0, 6.0 SP1, CA Desktop Protection Suite r2, CA Server Protection Suite r2, and CA Business Protection Suite r2 allows remote attackers to cause a denial of service (CPU consumption or application hang) via a large network packet, which causes a WSAEMESGSIZE error code that is not handled, leading to a thread exit.