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New Low Bandwidth Denial of Service Attacks

An anonymous reader writes "A paper from Rice University appearing at the 2003 ACM Sigcomm Conference presents a new denial of service attack where the attacker only needs to send at a low rate to shutdown TCP flows. The trick exploits the retransmission timeout mechanism in TCP. By sending small bursts of packets at just the right frequency, the attacker can cause all TCP flows sharing a bottleneck link to simultaneously stop indefinitely. And because the attacker only needs to burst periodically, the attacker will not be distinguishable from normal hosts. The presentation, and other presentations from the conference, are available online (live streaming)."

14 of 366 comments (clear)

  1. Thanks Taco for stepping in. by Anonymous Coward · · Score: -1, Offtopic

    Michael's impotent one-line rants about Speakeasy were really getting tiresome.

  2. This would've been FIRST POST by Anonymous Coward · · Score: -1, Offtopic

    If I hadn't just posted the GNAA & DeCSS code in the commenting on hte previous main page story. I'm sorry.

    Terribly sorry. 100%. So, what's hagning slashdots? Who hate sMichael? ME. I hat eMicahel.

    A lot.

    DeCSS rules!

    I DIDNT EVEN READ THE TITLE

    FIRST GNAA POST!

  3. morons suggest denial of service is not a won way. by Anonymous Coward · · Score: -1, Offtopic

    ..street.

    fuddles.con is running linux now. no DOWt about that.

    fauxking phonIE payper liesense stock markup FraUD execrable that they remain.

    that's right, after the walking dead finish exterminating themselves, & sadly enough, some of us, it won't take long to clean up this cesspool of greed/fear execrable.

    we're calling it the planet/population rescue program (formerly unknown as the oil for babies initiatve).

    the Godless wons are helping by continuing to show where their hearts lie.

    what's wrong with folks selling their kode? if it causes convenience, & interoperates with all the other kode on the planet, we say, no harm, no foul, so long as you fail to employ gangsterious/felonious practices to asphyxiate the 'competition'. sabotaging your free version of anything is a tad dastardly. if there's value added, without FUDging up the compatability, we'll pay. same with music. no more gouging dough though.

    fortunately, mr stallman et AL, etcetera, is now offering comparable/superior software, to the payper liesense spy/bug wear feechurned models, in almost every circumstance. there'll be few, if any more softwar billyonerrors, as if there's a need for even won. tell 'em robbIE. you are won of the last wons whois soul DOWt, right? .asp for va lairIE's whoreabull pateNTdead PostBlock(tm) devise?, used against the truth/to protect robbIE's payper liesense stock markup bosses/corepirate nazi 'sponsors'. yuk.

    back on task.

    what might happen to US if unprecedented evile/the felonious georgewellian southern baptist freemason fuddite rain of error, fails to be intervened on?

    you already know that too. stop pretending. it doesn't help/makes things worse.

    they could burn up the the main processor. that would be the rapidly heating planet/population, in case you're still pretending not to notice.

    of course, having to badtoll va lairIE's whoreabully infactdead, pateNTdead PostBlock(tm) devise, robbIE's ego, the walking dead, etc..., doesn't slow us down a bit.

    that's right. those foulcurrs best get ready to see the light. the WANing daze of the phonIE greed/fear/ego based, thieving/murdering payper liesense hostage taking stock markup FraUD georgewellian fuddite execrable are #ed. talk about a wormIE cesspool of deception? eradicating yOUR domestic corepirate nazi terrorist/gangsters will be the new national pastime.

    communications will improve, using whatever power sources are available.

    you gnu/software folks are to be commended. we'd be nearly doomed by now (instead, we're opening yet another isp service) without y'all. the check's in the mail again.

    meanwhile... for those yet to see the light.

    don't come crying to us when there's only won channel/os left.

    nothing has changed since the last phonIE ?pr? ?firm? generated 'news' brIEf. lots of good folks/innocents are being killed/mutilated daily by the walking dead. if anything the situations are continuing to deteriorate. you already know that.

    the posterboys for grand larcenIE/deception would include any & all of the walking dead who peddle phonIE stock markup payper to millions of hardworking conservative folks, & then, after stealing/spending/disappearing the real dough, pretend that nothing ever happened. sound familiar robbIE? these fauxking corepirate nazi larcens, want us to pretend along with them, whilst they continue to squander yOUR "investmeNTs", on their soul DOWt craving for excess/ego gratification. yuk

    no matter their ceaseless efforts to block the truth from you, the tasks (planet/population rescue) will be completed.

    the lights are coming up now.

    you can pretend all you want. our advise is to be as far away from the walking dead contingent as possible, when the big flash occurs. you wouldn't want to get any of that evile on you.

    as to the free unlimited energy plan, as the lights come up, more&more folks will stop being misled into sucking up mo

  4. worth reading, again, slowly, & with FEEling by Anonymous Coward · · Score: -1, Offtopic

    Dubya's resume:

    * I attacked and took over two countries.
    * I spent the US surplus and bankrupted the Treasury.
    * I shattered the record for biggest annual deficit in history.
    * I set an economic record for most private bankruptcies filed in any 12-month period.
    * I set all-time record for biggest drop in the history of the stock market.
    * I am the first president in decades to execute a federal prisoner.
    * I am the first president in US history to enter office with a criminal record.
    * In my first year in office Iset the all-time record for most days on vacation by any president in US history.
    * After taking the entire month of August off for vacation, Ipresided over the worst security failure in US history.
    * I set the record for most campaign fundraising trips by any president in US history.
    * In my first two years in office over 2 million Americans lost their jobs.
    * I cut unemployment benefits for more out-of-work Americans than any other president in US history.
    * I set the all-time record for most foreclosures in a 12-month period.
    * I appointed more convicted criminals to administration positions than any president in US history.
    * I set the record for the fewest press conferences of any president since the advent of TV.
    * I signed more laws and executive orders amending the Constitution than any other president in US history.
    * I presided over the biggest energy crises in US history and refused to intervene when corruption was revealed.
    * I presided over the highest gasoline prices in US history and refused to use the national reserves as past presidents have.
    * I cut healthcare benefits for war veterans.
    * I set the all-time record for most people worldwide to simultaneously take to the streets to protest me (15 million people), shattering the record for protest against any person in the history of mankind
    * I dissolved more international treaties than any president in US history.
    * I 've made my presidency the most secretive and unaccountable of any in US history.
    * Members of my cabinet are the richest of any administration in US history. (The 'poorest' multimillionaire, Condoleeza Rice, has a Chevron oil tanker named after her.)
    * I am the first president in US history to have all 50 states of the Union simultaneously go bankrupt.
    * I presided over the biggest corporate stock market fraud in any market in any country in the history of the world.
    * I am the first president in US history to order a US attack and military occupation of a sovereign nation, and Idid so against the will of the United Nations and the world community.
    * I have created the largest government department bureaucracy in the history of the United States.
    * I set the all-time record for biggest annual budget spending increases, more than any other president in US history.
    * I am the first president in US history to have the United Nations remove the US from the Human Rights Commission.
    * I am the first president in US history to have the United Nations remove the US from the Elections Monitoring Board.
    * I removed more checks and balances, and have the least amount of Congressional oversight than any presidential administration in US history.
    * I rendered the entire United Nations irrelevant.
    * I withdrew from the World Court of Law.
    * I refused to allow inspectors access to US prisoners of war and by default no longer abide by the Geneva Conventions.
    * I am the first president in US history to refuse United Nations election inspectors access during the 2002 US elections.
    * I am the all-time US (and world) record holder for most corporate campaign donations.
    * The biggest lifetime contributor to my campaign, who is also one of my best friends, presided over one of the largest corporate bankruptcy frauds in world history (Kenneth Lay, former CE

  5. There is no spoon. by Cyno · · Score: -1, Offtopic

    Can you purchase security? No.

    Can you design something to be secure? Not when you're worried about money.

    Has capitalism failed us? No?

    Then how do you recommend we fix all these broken things? I think there are enough broken/insecure things today that I shouldn't need to spell them out.

    After 9/11 we became paranoid. But for the wrong reasons. Everything is insecure. Because there aren't enough people to police everything all the time.

    This means that unless everyone is a happy employee they might be working for the other side. And the other side provides a much more entertaining work environment than corporate America, meaning they will most likely be more intelligent than you.

    Our culture, like NASA, is the problem. Capitalism defines our culture. See the problem?

  6. Re:worth reading, again, slowly, & with FEElin by pmz · · Score: -1, Offtopic


    But, but, he wears jeans! And he landed on an aircraft carrier!

    Now that he's locked in the TNN vote, 2004 will be a landslide.

  7. Re:Get the Lawyers ready. by daeley · · Score: 0, Offtopic

    Maybe we will see Microsoft do this, they like to sue the little guy.

    No, no. Microsoft likes to *buy* the little guy. The RIAA likes to sue the little guy. And SCO likes to sue the big guys to get bought by them.

    --
    I watched C-beams glitter in the dark near the Tannhauser gate.
  8. Re:worth reading, again, slowly, & with FEElin by Tailhook · · Score: -1, Offtopic

    I am the first president in decades to execute a federal prisoner.

    Timothy McViegh is the subject here. I'm hoping the Slashdot audience isn't kooky enough to have a problem with Bush allowing that guy to die. I hope to god we never elect someone that would have intervened to prevent it.

    --
    Maw! Fire up the karma burner!
  9. Obligatory simpsons quote... by pVoid · · Score: 0, Offtopic
    From episode where Sideshow Bob is running from the authorities (it's the Cape Fear-like one)...

    Sideshow Bob steals the Wright Bro's first airplane in an attempt to flee, the government scrambles Harriers.

    <snip> A pair of Harrier fly past them, and one pilot says, "Prepare to engage enemy." Unfortunately, they just speed right past Sideshow Bob. "Bogey's airspeed not sufficient for intercept. Suggest we get out and walk. We now see a very slow chase going on. The Wright Brothers' plane is being followed by two walking pilots, a squad car, an army jeep a tank, and the Simpsons </snip>

  10. YOUR URGENT ASSISTANCE REQUIRED by Anonymous Coward · · Score: -1, Offtopic



    DEAR SIR/MADAM:

    I AM MR DARL MCBRIDE CURRENTLY SERVING AS THE PRESIDENT AND CHIEF EXECUTIVE OFFICER OF THE SCO GROUP, FORMERLY KNOWN AS CALDERA SYSTEMS INTERNATIONAL, IN LINDON, UTAH, UNITED STATES OF AMERICA. I KNOW THIS LETTER MIGHT SURPRISE YOU BECAUSE WE HAVE HAD NO PREVIOUS COMMUNICATIONS OR BUSINESS DEALINGS BEFORE NOW.

    MY ASSOCIATES HAVE RECENTLY MADE CLAIM TO COMPUTER SOFTWARES WORTH AN ESTIMATED $1 BILLION U.S. DOLLARS. I AM WRITING TO YOU IN CONFIDENCE BECAUSE WE URGENTLY REQUIRE YOUR ASSISTANCE TO OBTAIN THESE FUNDS.

    IN THE EARLY 1970S THE AMERICAN TELEPHONE AND TELEGRAPH CORPORATION DEVELOPED AT GREAT EXPENSE THE COMPUTER OPERATING SYSTEM SOFTWARE KNOWN AS UNIX. UNFORTUNATELY THE LAWS OF MY COUNTRY PROHIBITED THEM FROM SELLING THESE SOFTWARES AND SO THEIR VALUABLE SOURCE CODES REMAINED PRIVATELY HELD. UNDER A SPECIAL ARRANGEMENT SOME PROGRAMMERS FROM THE CALIFORNIA UNIVERSITY OF BERKELEY DID ADD MORE CODES TO THIS OPERATING SYSTEM, INCREASING ITS VALUE, BUT NOT IN ANY WAY TO DILUTE OR DISPARAGE OUR FULL AND RIGHTFUL OWNERSHIP OF THESE CODES, DESPITE ANY AGREEMENT BETWEEN AMERICAN TELEPHONE AND TELEGRAPH AND THE CALIFORNIA UNIVERSITY OF BERKELEY, WHICH AGREEMENT WE DENY AND DISAVOW.

    IN THE YEAR 1984 A CHANGE OF REGIME IN MY COUNTRY ALLOWED THE AMERICAN TELEPHONE AND TELEGRAPH CORPORATION TO MAKE PROFITS FROM THESE SOFTWARES. IN THE YEAR 1990 OWNERSHIP OF THESE SOFTWARES WAS TRANSFERRED TO THE CORPORATION UNIX SYSTEM LABORATORIES. IN THE YEAR 1993 THIS CORPORATION WAS SOLD TO THE CORPORATION NOVELL. IN THE YEAR 1994 SOME EMPLOYEES OF NOVELL FORMED THE CORPORATION CALDERA SYSTEMS INTERNATIONAL, WHICH BEGAN TO DISTRIBUTE AN UPSTART OPERATING SYSTEM KNOWN AS LINUX. IN THE YEAR 1995 NOVELL SOLD THE UNIX SOFTWARE CODES TO SCO. IN THE YEAR 2001 OCCURRED A SEPARATION OF SCO, AND THE SCO BRAND NAME AND UNIX CODES WERE ACQUIRED BY THE CALDERA SYSTEMS INTERNATIONAL, AND IN THE FOLLOWING YEAR THE CALDERA SYSTEMS INTERNATIONAL WAS RENAMED SCO GROUP, OF WHICH I CURRENTLY SERVE AS CHIEF EXECUTIVE OFFICER.

    MY ASSOCIATES AND I OF THE SCO GROUP ARE THEREFORE THE FULL AND RIGHTFUL OWNERS OF THE OPERATING SYSTEM SOFTWARES KNOWN AS UNIX. OUR ENGINEERS HAVE DISCOVERED THAT NO FEWER THAN SEVENTY (70) LINES OF OUR VALUABLE AND PROPRIETARY SOURCE CODES HAVE APPEARED IN THE UPSTART OPERATING SYSTEM LINUX. AS YOU CAN PLAINLY SEE, THIS GIVES US A CLAIM ON THE MILLIONS OF LINES OF VALUABLE SOFTWARE CODES WHICH COMPRISE THIS LINUX AND WHICH HAS BEEN SOLD AT GREAT PROFIT TO VERY MANY BUSINESS ENTERPRISES. OUR LEGAL EXPERTS HAVE ADVISED US THAT OUR CONTRIBUTION TO THESE CODES IS WORTH AN ESTIMATED ONE (1) BILLION U.S. DOLLARS.

    UNFORTUNATELY WE ARE HAVING DIFFICULTY EXTRACTING OUR FUNDS FROM THESE COMPUTER SOFTWARES. TO THIS EFFECT I HAVE BEEN GIVEN THE MANDATE BY MY COLLEAGUES TO CONTACT YOU AND ASK FOR YOUR ASSISTANCE. WE ARE PREPARED TO SELL YOU A SHARE IN THIS ENTERPRISE, WHICH WILL SOON BE VERY PROFITABLE, THAT WILL GRANT YOU THE RIGHTS TO USE THESE VALUABLE SOFTWARES IN YOUR BUSINESS ENTERPRIS
    E. UNFORTUNATELY WE ARE NOT ABLE AT THIS TIME TO SET A PRICE ON THESE RIGHTS. THEREFORE IT IS OUR RESPECTFUL SUGGESTION, THATYOU MAY BE IMMEDIATELY A PARTY TO THIS ENTERPRISE,BEFORE OTHERS ACCEPT THESE LUCRATIVE TERMS, THAT YOU SEND US THE NUMBER OF A BANKING ACCOUNT WHERE WE CAN WITHDRAW FUNDS OF A SUITABLE AMOUNT TO GUARANTEE YOUR PARTICIPATION IN THIS ENTERPRISE. AS AN ALTERNATIVE YOU MAY SEND US THE NUMBER AND EXPIRATION DATE OF YOUR MAJOR CREDIT CARD, OR YOU MAY SEND TO US A SIGNED CHECK FROM YOUR BANKING ACCOUNT PAYABLE TO "SCO GROUP" AND WITH THE AMOUNT LEFT BLANK FOR US TO CONVENIENTLY SUPPLY.

    KINDLY TREAT THIS REQUEST AS VERY IMPORTANT AND STRICTLY CONFIDENTIAL. I HONESTLY ASSURE YOU THAT THIS TRANSACTION IS 100% LEGAL AND RISK-FREE.

    credit to rec.humor.funny

  11. 2400 is old school? by anonymous+loser · · Score: 0, Offtopic

    Holy crap I remember when I finally got a 2400 baud modem after suffering with a 300 baud "brick" modem for a couple of years. It was like the Renaissance. All of a sudden I could actually send and receive files faster than I could type them by hand!

    1. Re:2400 is old school? by tgd · · Score: 0, Offtopic

      If you didn't have an acoustic coupler, you're a n00b. I remember what a pain in the ass it what when the phone died, and I had to find a replacement phone like the old ATT ones that would fit the damn thing. It was an exciting day when I moved up to a 300 baud modem you could actually plug straight into the phone line. Unfortunately the house wasn't wired with RJ-45 jacks, which was an entirely other issue.

    2. Re:2400 is old school? by anonymous+loser · · Score: 0, Offtopic

      Actually I *did* have an acoustic coupler. Yours couldn't do 300 baud? I was happy when I upgraded to a modem that just had an RJ-45 jack since it improved my error rate quite a bit.

  12. PENIS by Anonymous Coward · · Score: -1, Offtopic

    GO SUCK A COCK COWBOY NEAL