冲击波蠕虫（Worm.Blaster或Lovesan，也有译为「疾风病毒」）是一种散播于Microsoft操作系统，Windows XP与Windows 2000的蠕虫病毒，爆发于2003年8月。

本蠕虫第一次被注意并如燎原火般散布，是在2003年的8月11日。它不断繁殖并感染，在8月13日达到高峰，之后借助ISP与网络上散布的治疗方法阻止了此蠕虫的散布。

在2003年8月29日，一个来自美国明尼苏达州的18岁年轻人Jeffrey Lee Parson由于创造了Blaster.B变种而被逮捕；他在2005年被判处十八个月的有期徒刑。

The Blaster Worm (also known as Lovsan, Lovesan or MSBlast) was a computer worm that spread on computers running the Microsoft operating systems Windows XP and Windows 2000, during August 2003.

The worm was first noticed and started spreading on August 11, 2003. The rate that it spread increased until the number of infections peaked on August 13, 2003. Once a network (such as a company or university) was infected, it spread quicker within the network because firewalls typically did not prevent internal machines from using a certain port. Filtering by ISPs and widespread publicity about the worm curbed the spread of Blaster.