Figure 9-2: Malware Worms Stand-alone programs that do not need to attach to other programs Can propagate like viruses through e-mail, etc But this require human gullibility, which is slow In addition, vulnerability-enabled worms jump to victim hosts directl Can do this because hosts have vulnerabilities Vulnerability-enabled worms can spread with amazing speed Vendors develop patches for vulnerabilities but companies often fail or are slow to apply them 66 Figure 9-2: Malware • Worms – Stand-alone programs that do not need to attach to other programs – Can propagate like viruses through e-mail, etc. • But this require human gullibility, which is slow – In addition, vulnerability-enabled worms jump to victim hosts directly • Can do this because hosts have vulnerabilities • Vulnerability-enabled worms can spread with amazing speed • Vendors develop patches for vulnerabilities but companies often fail or are slow to apply them