Date: Tue, 20 Apr 2004 15:23:14 -0500 From: masta <diz@linuxpowered.com> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-security@freebsd.org Subject: Re: TCP RST attack Message-ID: <408586B2.8020900@linuxpowered.com> In-Reply-To: <6.0.3.0.0.20040420144001.0723ab80@209.112.4.2> References: <6.0.3.0.0.20040420125557.06b10d48@209.112.4.2> <xzphdve35oa.fsf@dwp.des.no> <200404201113.27737.dr@kyx.net> <xzp65buh5fa.fsf@dwp.des.no> <6.0.3.0.0.20040420144001.0723ab80@209.112.4.2>
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Does anybody remember this: http://lcamtuf.coredump.cx/newtcp/ This seems fairly clear to me that guessing our tcp sequences is near omnipotent power. -Jon Mike Tancsa wrote: > At 02:26 PM 20/04/2004, Dag-Erling Smørgrav wrote: > >> Dragos Ruiu <dr@kyx.net> writes: >> > On April 20, 2004 10:44 am, Dag-Erling Smørgrav wrote: >> > > The advisory grossly exaggerates the impact and severity of this >> > > fea^H^H^Hbug. The attack is only practical if you already know the >> > > details of the TCP connection you are trying to attack, or are in a >> > > position to sniff it. >> > This is not true. The attack does not require sniffing. >> >> You need to know the source and destination IP and port. In most >> cases, this means sniffing. BGP is easier because the destination >> port is always 179 and the source and destination IPs are recorded in >> the whois database, but you still need to know the source port. > > > While true, you do need the source port, how long will it take to > programmatically go through the possible source ports in an attack ? > That only adds 2^16-1024 to blast through > > ---Mike > > > > > >> DES >> -- >> Dag-Erling Smørgrav - des@des.no > > > _______________________________________________ > freebsd-security@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-security > To unsubscribe, send any mail to > "freebsd-security-unsubscribe@freebsd.org" >
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