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    Home Cybersecurity
    • Cybersecurity

    HP Writes Good Worm?

    Written by

    Larry Seltzer
    Published August 23, 2004
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      Worms and other malware employ a variety of techniques to find new systems to attack. Many of them scan the network for systems containing specific, remotely exploitable vulnerabilities. Some of the fastest and most successful worms, such as Slammer and Code Red, worked this way.

      HP thinks two can play at that game. The company has released its Active Countermeasures technology to a limited beta audience. Its an innovative network scanning tool that looks for systems on the network that “are unmapped or do not comply with security policy, and therefore represent vulnerable points in the network.”

      When it finds these systems, it “automatically deploys policy-driven mitigation techniques.” It appears that the scanner actually exploits the vulnerabilities in order to gain control and deploy the mitigation techniques.

      /zimages/6/28571.gifFor insights on security coverage around the Web, check out eWEEK.com Security Center Editor Larry Seltzers Weblog.

      Taking the biological metaphor for all its worth, HP says this is part of a “corporate immune system” that includes other innovative techniques such as a mail server that implements the companys “Virus Throttler,” which sets rate-limiting on mail connections to limit the damage that mail worms can do.

      /zimages/6/28571.gifClick here to read about rate-limiting as an anti-spam tool.

      Joe Pato, a distinguished technologist at HP Labs, spoke about this technology at the RSA conference in San Francisco earlier this year, where he likened the technique to vaccination, in which the patient receives a less virulent form of the infection.

      So, its a network vulnerability scanner with a difference. One might expect Active Countermeasures to be more effective against rogue systems on the network than a conventional scanner, but to what degree? If a system is not supposed to be there, do you really want to patch it and install your anti-virus client, or do you want to block it off the network somehow and alert the administrator?

      Its not hard to imagine many problems resulting from aggressive use of this technology, although not everyone would call all of them problems. For instance, the guest or consultant who connects to the network without going through all of the proper channels first—and ends up getting his system “infected.”

      Im also curious as to how hard it would be to write a custom honeypot to bait Active Countermeasures. Nothings perfect, I guess. Im sure Active Countermeasures is designed to address the common cases, not every theoretical crack of itself.

      /zimages/6/28571.gifRead more here about the use of honeypots to detect intrusions.

      Because of some poorly worded articles, there was some talk about Active Countermeasures being an actual “good worm,” but this was misplaced. Worms spread, as I understand them, and Active Countermeasures simply uses wormlike attacks against unsecured systems, but it doesnt spread any further than that.

      Still, one could wonder whether its a good idea to exploit vulnerabilities for good purposes. Does the end justify the means? There are several recent examples of worms written to do “good” things, most famously Welchia, which used the RPC/DCOM vulnerability and then tried to patch it.

      Go ask the corporate administrators that HP wants to sell to if theyd like you to spread Welchia on their networks, but make sure youre wearing a cup first.

      Of course, Welchia is a worm and Active Countermeasures isnt, but its going to take a whole lot of testing with detailed record-keeping on other peoples networks before I trust this technology on mine. Is it really better than other scanning and remediation techniques? Lets exhaust the honest means before we start enshrining attack code as an active security tool.

      Security Center Editor Larry Seltzer has worked in and written about the computer industry since 1983.

      /zimages/6/28571.gifFor insights on security coverage around the Web, check out eWEEK.com Security Center Editor Larry Seltzers Weblog.

      More from Larry Seltzer

      Larry Seltzer
      Larry Seltzer
      Larry Seltzer has been writing software for and English about computers ever since—,much to his own amazement— He was one of the authors of NPL and NPL-R, fourth-generation languages for microcomputers by the now-defunct DeskTop Software Corporation. (Larry is sad to find absolutely no hits on any of these +products on Google.) His work at Desktop Software included programming the UCSD p-System, a virtual machine-based operating system with portable binaries that pre-dated Java by more than 10 years.For several years, he wrote corporate software for Mathematica Policy Research (they're still in business!) and Chase Econometrics (not so lucky) before being forcibly thrown into the consulting market. He bummed around the Philadelphia consulting and contract-programming scenes for a year or two before taking a job at NSTL (National Software Testing Labs) developing product tests and managing contract testing for the computer industry, governments and publication.In 1991 Larry moved to Massachusetts to become Technical Director of PC Week Labs (now eWeek Labs). He moved within Ziff Davis to New York in 1994 to run testing at Windows Sources. In 1995, he became Technical Director for Internet product testing at PC Magazine and stayed there till 1998.Since then, he has been writing for numerous other publications, including Fortune Small Business, Windows 2000 Magazine (now Windows and .NET Magazine), ZDNet and Sam Whitmore's Media Survey.

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