On Wed, Oct 01, 2008 at 03:58:22PM +0200, Claudio Jeker wrote:
| On Wed, Oct 01, 2008 at 03:31:00PM +0200, Stephan A. Rickauer wrote:
| > On Wed, 2008-10-01 at 14:52 +0200, Leon Dippenaar wrote:
| > > Hi there,
| > >
| > > is there any weight to this new story on slashdot
| > > http://it.slashdot.org/it/08/10/01/0127245.shtml
| > >
| > > about a new attacker possible to break any tcp stack? Sounds rather
| > > shady, so here I am, perhaps you guys have your ears closer to the
ground
| >
| > A little bit less vage info can be found here
| >
| > http://tinyurl.com/3hv3kf
| >
|
| This article is mostly about exploiting SYN cookies to bring servers into
| resource starvation. OpenBSD does not implement SYN cookies. We have a SYN
| cache with a upper limit of open handshakes. Together with random initial
| sequence numbers it is hard to finish the 3-way handshake without getting
| the SYN/ACK from the server on OpenBSD systems.
So far, I've heard about issues with TCP *after* a session has been
established (ie, after the 3-way handshake). Somehow exploiting TCP
state timers to affect badness (DoS), maybe.
I agree with Claudio that very little is public so far (I don't eat
cereals, but I believe the same is true for my jar of peanutbutter).
