oss-sec mailing list archives
Re: DNS vulnerability: other relevant software
From: Eugene Teo <eteo () redhat com>
Date: Thu, 10 Jul 2008 13:19:14 +0800
Mark J Cox wrote:
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 Vendors may with to consider backporting that kernel patch as an effective mitigation without requiring glibc changes (and with the advantage of being able to be have a customized range using ip_local_port_range etc)
I have backported the kernel patch to apply cleanly to various versions of Red Hat Enterprise Linux kernels. Vendors interested in the patch can find it at: https://bugzilla.redhat.com/show_bug.cgi?id=454566 Thanks, Eugene -- Eugene Teo / Red Hat Security Response Team
Current thread:
- Re: DNS vulnerability: other relevant software, (continued)
- Re: DNS vulnerability: other relevant software Mark J Cox (Jul 09)
- Re: DNS vulnerability: other relevant software Florian Weimer (Jul 09)
- Re: DNS vulnerability: other relevant software Eugene Teo (Jul 09)
- Re: DNS vulnerability: other relevant software Eugene Teo (Jul 09)
- Re: DNS vulnerability: other relevant software Eugene Teo (Jul 10)
- Re: DNS vulnerability: other relevant software Nathanael Hoyle (Jul 10)
- Re: DNS vulnerability: other relevant software Bernhard R. Link (Jul 11)
- Re: DNS vulnerability: other relevant software Nathanael Hoyle (Jul 11)
- Re: DNS vulnerability: other relevant software Florian Weimer (Jul 13)
- Re: DNS vulnerability: other relevant software Mark J Cox (Jul 09)
- Re: DNS vulnerability: other relevant software Florian Weimer (Jul 12)
- Re: DNS vulnerability: other relevant software Eugene Teo (Jul 09)