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Blaster worm

By , About.com Guide

Name:
Blaster
Also known as:
Lovsan, MSBlast, Poza, Welchi, and Nachi
Type:
Internet worm
Affects:
Microsoft IIS, Windows 2000, Windows NT, and Windows XP
Discovered:
August 11, 2003
Description:
The Blaster worm and variants exploit a critical RPC/DCOM flaw in Microsoft software affecting Microsoft IIS, Windows 2000, Windows NT, and Windows XP.Within a week of the initial Blaster worm discovery, several new variants had been released - including MSBlast.D, a.k.a. Welchi or Nachi, which used the same exploit to discover, disinfect, and patch susceptible systems. However, these actions had many unpleasant side affects that made a Welchi infection more undesirable than one from the original Blaster.
Vulnerability details:
  • Details on vulnerability, patch, and workaround
    Detailed description:

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