oss-sec mailing list archives

Re: CVE Request: linux kernel net_get_random_once bug


From: Hannes Frederic Sowa <hannes () stressinduktion org>
Date: Wed, 01 Oct 2014 23:00:54 +0200

Hello,

On Wed, Oct 1, 2014, at 20:04, Andrew Tappert wrote:
My colleague Tom O'Connor and I have identified a security bug in the
Linux kernel that results in drastically degraded randomness of IP IDs,
TCP sequence numbers, and ephemeral port numbers on affected systems.
The bug existed in kernel versions 3.13 and 3.14.  We are posting here
rather than to the private "distros" list because the bug has already
been fixed.  However, we don't think that the security implications of
the bug have been acknowledged anywhere, and we think it needs a CVE.  A
full write-up on the bug is posted at
http://secondlookforensics.com/ngro-linux-kernel-bug/.

I totally agree that this needs a CVE and I thought it was already taken
care of by the people on security () kernel org. I am sorry to not have
checked for a CVE request afterwards.

The corresponding fix is here:
<https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3d4405226d27b3a215e4d03cfa51f536244e5de7>

Thanks a lot,
Hannes


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