Date: Thu, 10 Jul 2008 14:08:49 +0800 From: Eugene Teo <eteo@...hat.com> To: oss-security@...ts.openwall.com Subject: Re: DNS vulnerability: other relevant software Eugene Teo wrote: > Florian Weimer wrote: >> * Mark J. Cox: >> >>>> Additionally, Debian has noted (DSA 1605-1) that the GNU libc stub >>>> resolver could benefit from random query source ports as well, but >>>> no patches are currently available to implement this: >>> Note that GNU libc stub resolver when used with a recent kernel >>> (2.6.24+) will give you random UDP source ports on each request >>> because of this Linux commit: >>> >>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=32c1da70810017a98aa6c431a5494a302b6b9a30 >> Is net_random() cryptographically secure? The paper referenced in the >> source doesn't talk about this. > > It isn't. It's actually a 32-bit pseudo-random number generator AFAIK. Actually, I'm not sure. I'm checking with my colleagues who may be more familiar with the implementation of net_random/random32() routine. Thanks, Eugene
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