full-disclosure - Core Internet Vulnerable

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Message-ID: <C796CC309701334DAC47E0FC29312D140642FF6C@srv-it-exch2.honi.com>
From: SturmM at honi.com (SturmM)
Subject: Core Internet Vulnerable - News at 11:00

NISCC has issued an advisory:

http://www.uniras.gov.uk/vuls/2004/236929/index.htm

SANS has some good info too:

http://isc.sans.org/diary.php?date=2004-04-20 

Mark

-----Original Message-----
From: full-disclosure-admin@...ts.netsys.com
[mailto:full-disclosure-admin@...ts.netsys.com]On Behalf Of Crist J.
Clark
Sent: Tuesday, April 20, 2004 12:28 PM
To: full-disclosure@...ts.netsys.com
Subject: [Full-Disclosure] Core Internet Vulnerable - News at 11:00

Does anyone know WTF they are trying to say in this AP article,
"Core Internet Technology Is Vulnerable,"

http://story.news.yahoo.com/news?tmpl=story&cid=562&ncid=738&e=1&u=/ap/20040
420/ap_on_hi_te/internet_threat

It sounds like they are talking about a sequence number guessing
attack on TCP BGP sessions? Sequence number prediction isn't really
a new attack, but the story says,

  "Experts previously maintained such attacks could take between
   four years and 142 years to succeed because they require guessing
   a rotating number from roughly 4 billion possible combinations.
   Watson said he can guess the proper number with as few as four
   attempts, which can be accomplished within seconds."

Hmmm... Four attempts... And the story makes it sound like a 
cross-platform attack, not a bug in a particular OS's ISN generation.
FUD or is there something here?
-- 
Crist J. Clark                     |     cjclark@...m.mit.edu
                                   |     cjclark@....edu
http://people.freebsd.org/~cjc/    |     cjc@...ebsd.org

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