Date: Fri, 3 Apr 2015 11:54:01 +0200 From: "D.S. Ljungmark" <ljungmark@modio.se> To: Jim Thompson <jim@netgate.com> Cc: Eitan Adler <lists@eitanadler.com>, oss-security@lists.openwall.com, FreeBSD Security Team <secteam@freebsd.org>, "freebsd-net@freebsd.org" <net@freebsd.org> Subject: Re: [oss-security] CVE Request : IPv6 Hop limit lowering via RA messages Message-ID: <CAO0vwOV33zHW=z4FDHq91yX5UHxnDKtXnzqzkYCrR%2Bkoxh1d9g@mail.gmail.com> In-Reply-To: <942E0C08-E883-429E-9F27-22715C00B684@netgate.com> References: <CAO0vwOXOPSGb8xWiutn%2Br%2BrXhSQc3SwC8-S2bkpRZuRAvDOyHw@mail.gmail.com> <CAF6rxgk6e1rT3prS3SS4FthshnVQdSrrE%2BbB65ps6Tx30UznAA@mail.gmail.com> <942E0C08-E883-429E-9F27-22715C00B684@netgate.com>
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On Fri, Apr 3, 2015 at 6:06 AM, Jim Thompson <jim@netgate.com> wrote:
> have you considered that there might not be a relevant patch because Free=
BSD=E2=80=99s implementation isn=E2=80=99t affected?
sys/netinet6/nd6_rtr.c
300 if (nd_ra->nd_ra_curhoplimit)
301 ndi->chlim =3D nd_ra->nd_ra_curhoplimit;
The only "OUT" in that function I see are tests for:
Not accepting RA
hoplimit on current packet !=3D 255
not link-local
No extended ipv6 header
Based on previous testing ( early March 2015), and reading of the
source, I say that FreeBSD is vulnerable.
Regards,
D.S. Ljungmark
>
> Jim
>
>> On Apr 2, 2015, at 9:15 PM, Eitan Adler <lists@eitanadler.com> wrote:
>>
>> + FreeBSD lists since I haven't seen any relevant patches (although I
>> might have missed them).
>>
>> ---------- Forwarded message ----------
>> From: D.S. Ljungmark <ljungmark@modio.se>
>> Date: 2 April 2015 at 10:19
>> Subject: [oss-security] CVE Request : IPv6 Hop limit lowering via RA mes=
sages
>> To: oss-security@lists.openwall.com
>>
>>
>> An unprivileged user on a local network can use IPv6 Neighbour
>> Discovery ICMP to broadcast a non-route with a low hop limit, this
>> causing machines to lower the hop limit on existing IPv6 routes.
>>
>> Linux Patch: http://www.spinics.net/lists/netdev/msg322361.html
>> Redhat bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=3D1203712
>>
>> Projects impacted: Linux kernel, NetworkManager, FreeBSD Kernel
>>
>>
>> Regards,
>> D.S. Ljungmark
>>
>>
>> --
>> Eitan Adler
>> _______________________________________________
>> freebsd-net@freebsd.org mailing list
>> http://lists.freebsd.org/mailman/listinfo/freebsd-net
>> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
>
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