Date: Tue, 15 Jan 2008 16:22:52 +1100 From: Mark Andrews <Mark_Andrews@isc.org> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-security@freebsd.org Subject: Re: FreeBSD Security Advisory FreeBSD-SA-08:02.libc Message-ID: <200801150522.m0F5MqV1061436@drugs.dv.isc.org> In-Reply-To: Your message of "Mon, 14 Jan 2008 23:28:46 CDT." <200801150428.m0F4SaH1084137@lava.sentex.ca>
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> At 06:09 PM 1/14/2008, FreeBSD Security Advisories wrote:
> >-----BEGIN PGP SIGNED MESSAGE-----
> >Hash: SHA1
> >
> >============================================================================
> =
> >FreeBSD-SA-08:02.libc Security Advisor
> y
> > The FreeBSD Proje
> ct
> >
> >Topic: inet_network() buffer overflow
> >
> >For programs which passes untrusted data to inet_network(), an
> >attacker may be able to overwrite a region of memory with user defined
> >data by causing specially crafted input to be passed to
> >inet_network().
>
> For the "usual suspects" of applications running, (e.g. sendmail,
> apache, BIND etc) would it be possible to pass crafted packets
> through to this function remotely via those apps ? ie how easy is this to do
> ?
The usual suspects don't call inet_network().
route calls inet_network() but not routed doesn't.
Mark
% nm /usr/obj/usr/src/usr.sbin/sendmail/sendmail | grep inet
U __inet_addr
U __inet_ntoa
U __inet_ntop
U __inet_pton
%
% nm /usr/obj/usr/src/usr.sbin/named/named | grep inet
U __inet_aton
U __inet_ntop
U __inet_pton
0817f084 d cfg_type_inetcontrol
0814ee20 t inet_ntop4
0814f0f8 t inet_pton4
080fb668 t inet_totext
0817f0a0 d inetcontrol_fields
%
% nm /usr/obj/usr/src/sbin/route/route | grep inet
U __inet_aton
U __inet_lnaof
U __inet_network
U __inet_ntoa
08049a94 T inet_makenetandmask
%
> ---Mike
>
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--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@isc.org
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