ISS Security Brief: "MS Blast" MSRPC DCOM Worm Propagation

From: X-Force (
Date: 08/12/03

  • Next message: Graham, Robert (ISS Atlanta): "Re: DCOM worm analysis report: W32.Blaster.Worm"
    Date: Mon, 11 Aug 2003 18:19:34 -0400 (EDT)


    Internet Security Systems Security Brief
    August 11, 2003

    "MS Blast" MSRPC DCOM Worm Propagation


    ISS X-Force has captured active samples of an automated Internet worm that
    propagates via the MS RPC DCOM vulnerability documented in ISS X-Force
    Alert titled "Flaw in Microsoft Windows RPC Implementation"
    ( This worm is currently
    propagating aggressively across the Internet.


    Any vulnerable desktop or server connected to the Internet may be
    vulnerable to attack. All Windows 2000, Windows XP and Windows NT 4.0
    computers that have not been patched are vulnerable to attack from the
    automated worm, or manual attack. X-Force believes that hundreds of
    thousands of computers may still be vulnerable. Unsuccessful propagation
    attempts may crash vulnerable computers, or render them unstable.
    Successful worm outbreaks have been known to cause significant localized
    network latency, and widespread denial of service.

    For the complete ISS X-Force Security Alert, please visit:


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