Date: Thu, 29 Jan 2015 14:31:11 +0000 From: Gary Palmer <gpalmer@freebsd.org> To: Ian Smith <smithi@nimnet.asn.au> Cc: freebsd-security@freebsd.org, Nick Frampton <nick.frampton@akips.com>, jungle Boogie <jungleboogie0@gmail.com> Subject: Re: FreeBSD Security Advisory FreeBSD-SA-15:02.kmem Message-ID: <20150129143111.GA29167@in-addr.com> In-Reply-To: <20150130011402.P36378@sola.nimnet.asn.au> References: <mailman.92.1422446402.71362.freebsd-security@freebsd.org> <20150128194011.2175B19F@hub.freebsd.org> <20150128211910.80082283DA18@rock.dv.isc.org> <54C966BF.9000803@rewt.org.uk> <54C9837C.8090704@akips.com> <CAKE2PDsC8dvx23H5DZ_b90F7PmPr3LB8kyw68SbuHgF4Hb%2BnkA@mail.gmail.com> <20150130011402.P36378@sola.nimnet.asn.au>
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On Fri, Jan 30, 2015 at 01:20:56AM +1100, Ian Smith wrote: > On Wed, 28 Jan 2015 17:01:50 -0800, jungle Boogie wrote: > > Hi Nick, > > On Jan 28, 2015 4:56 PM, "Nick Frampton" <nick.frampton@akips.com> wrote: > > > > > > On 29/01/15 08:46, Joe Holden wrote: > > >> > > >> Really, how many SCTP users are there om the wild... maybe one? > > >> > > >> It shouldn't be in GENERIC at the very least! > > > > > > > > > We use Netflow over SCTP in our network monitoring product, so it would > > be a pain to have to build a custom kernel. > > > > But also a pain to have an exploit when it could be prevented. > > Are you vulnerable to an SCTP exploit if you're not using SCTP? >From one of the advisories (FreeBSD-SA-15:02.kmem): -- QUOTE -- An unprivileged process can read or modify 16-bits of memory which belongs to the kernel. This smay lead to exposure of sensitive information or allow privilege escalation. -- ENDQUOTE -- So even if you don't use SCTP, if someone got a shell on your box they could potentially use SCTP to get root or modify kernel memory to break out of a jail, etc. In other words, you don't necessarily need to use SCTP to be affected by vulnerabilities in it. Regards, Gary
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