Date: Wed, 15 Aug 2018 12:06:54 +0200 From: Marcus Meissner <meissner@...e.de> To: oss-security@...ts.openwall.com Subject: Re: CVE-2018-5391: Linux kernel: IP fragments with random offsets allow a remote denial of service (FragmentSmack) Hi, no. SegmentSmack affects TCP segments, FragmentSmack affects IP fragments (lower protocol level). Ciao, Marcus On Tue, Aug 14, 2018 at 05:09:38PM -0400, David T. wrote: > Is this the same as "SegmentSmack" that came out last week, CVE-2018-5390? > Or, what is the difference? > > On Tue, Aug 14, 2018 at 16:31 Vladis Dronov <vdronov@...hat.com> wrote: > > > Heololo, > > > > A flaw named FragmentSmack was found in the way the Linux kernel handled > > reassembly of fragmented IPv4 and IPv6 packets. A remote attacker could > > use this flaw to trigger time and calculation expensive fragment reassembly > > algorithms by sending specially crafted packets which could lead to a CPU > > saturation and hence a denial of service on the system. > > > > External References: > > > > https://www.kb.cert.org/vuls/id/641765 > > > > https://access.redhat.com/articles/3553061 > > > > https://bugzilla.redhat.com/show_bug.cgi?id=1609664 > > > > Best regards, > > Vladis Dronov | Red Hat, Inc. | Product Security Engineer > > > -- > Very respectfully, > > David M Thomsen -- Marcus Meissner,SUSE LINUX GmbH; Maxfeldstrasse 5; D-90409 Nuernberg; Zi. 3.1-33,+49-911-740 53-432,,serv=loki,mail=wotan,type=real <meissner@...e.de>
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