oss-sec mailing list archives
Re: DNS vulnerability: other relevant software
From: Mark J Cox <mjc () redhat com>
Date: Wed, 9 Jul 2008 14:36:10 +0100 (BST)
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=32c1da70810017a98aa6c431a5494a302b6b9a30Vendors 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)
Cheers, Mark
Current thread:
- DNS vulnerability: other relevant software Matthias Geerdsen (Jul 09)
- Re: DNS vulnerability: other relevant software The Fungi (Jul 09)
- 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 The Fungi (Jul 09)
- Re: DNS vulnerability: other relevant software Florian Weimer (Jul 12)
- Re: DNS vulnerability: other relevant software Eugene Teo (Jul 09)