Date: Thu, 9 Oct 2014 15:59:28 +0200 From: Oliver Pinter <oliver.pntr@gmail.com> To: Hans Petter Selasky <hps@selasky.org> Cc: freebsd-security@freebsd.org, "Julian H. Stacey" <jhs@berklix.com>, Poul-Henning Kamp <phk@phk.freebsd.dk>, freebsd-usb@freebsd.org Subject: Re: BadUSB - On Accessories that Turn Evil, by Karsten Nohl + Jakob Lell Message-ID: <CAPjTQNHbh40oeeuJnCk%2BiiKLOFO9TJU0Z13uRp6FawuUrmHvnw@mail.gmail.com> In-Reply-To: <54362AE2.90501@selasky.org> References: <201410082347.s98NkjW3025396@fire.js.berklix.net> <54362AE2.90501@selasky.org>
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On 10/9/14, Hans Petter Selasky <hps@selasky.org> wrote: > Hi Julian, > > On 10/09/14 01:46, Julian H. Stacey wrote: >> Hi Hans etc >> "Julian H. Stacey" wrote: >>> Hans Petter Selasky wrote: >>>> Hi, >>>> >>>> Can you test the following kernel patch and give some feedback: >>>> >>>> https://svnweb.freebsd.org/changeset/base/272733 >> >> I'm now on latest current with src & sys/ GENERIC >> /usr/src/.ctm_status # src-cur 11645 >> >> This time I downloaded your files properly >> (last time I was severely distracted & made a silly mistake) >> >>>> After the patch you will get something like: >>>> hw.usb.disable_enumeration: 0 >>>> dev.uhub.0.disable_enumeration: 0 >>>> dev.uhub.1.disable_enumeration: 0 >>>> ... >> >> sysctl -a | grep enumeration >> hw.usb.disable_enumeration: 0 >> dev.uhub.0.disable_enumeration: 0 >> dev.uhub.1.disable_enumeration: 0 >> dev.uhub.2.disable_enumeration: 0 >> dev.uhub.3.disable_enumeration: 0 >> dev.uhub.4.disable_enumeration: 0 >> >> sysctl -d hw.usb.disable_enumeration >> hw.usb.disable_enumeration: Set to disable all USB device enumeration. >> >> sysctl -d dev.uhub.4.disable_enumeration >> dev.uhub.4.disable_enumeration: Set to disable enumeration on this USB >> HUB. >> >> usbconfig >> ugen0.1: <EHCI root HUB Intel> at usbus0, cfg=0 md=HOST spd=HIGH (480Mbps) >> pwr=SAVE (0mA) >> ugen1.1: <EHCI root HUB Intel> at usbus1, cfg=0 md=HOST spd=HIGH (480Mbps) >> pwr=SAVE (0mA) >> ugen0.2: <product 0x0020 vendor 0x8087> at usbus0, cfg=0 md=HOST spd=HIGH >> (480Mbps) pwr=SAVE (0mA) >> ugen1.2: <product 0x0020 vendor 0x8087> at usbus1, cfg=0 md=HOST spd=HIGH >> (480Mbps) pwr=SAVE (0mA) >> ugen0.3: <1.3M WebCam XPA2535XY> at usbus0, cfg=255 md=HOST spd=HIGH >> (480Mbps) pwr=OFF (500mA) >> ugen1.3: <Semi Tech PS2 Keyboard - PS2 Mouse Semi Tech> at usbus1, cfg=0 >> md=HOST spd=LOW (1.5Mbps) pwr=ON (100mA) >> ugen1.4: <USB2.0 Hub vendor 0x05e3> at usbus1, cfg=0 md=HOST spd=HIGH >> (480Mbps) pwr=SAVE (100mA) >> > >> >> Great ! Seems to work. >> >> (Though I need to read up on how major & minor of ugen relate to >> the digit in eg 4.disable_enumeration) >> >> >>>> which is also settable through /boot/loader.conf (tunable) >> >> Good, >> I hope/presume loader.conf gets run before any USB, cos I recall >> lecturer Karsten Nohl pointing out one could get BadUSB taking up >> residence in USB controller chips inside a PC, ie for a built in >> mouse or web cam, so one would need to turn off enumeration earlier >> than when first external USB approaches to connect. > > Yes, if set by the loader.conf, you will only see the RootHUB after boot. > > To get devices back after enabling enumeration again, you will need to > reset the HUBs: > > usbconfig -d X.1 reset > > For example. > > BTW: I've added some exceptions, that existing devices can be detached, > suspend/resumed and reset while the enumeration is disabled. Can we somehow improve this change, to powering down the ports/hubs which has the enumeration disabled? > > https://svnweb.freebsd.org/changeset/base/272807 > >> >> I've reported back on BBC news form: >> Ref. your >> 6 October 2014 Last updated at 15:29 GMT >> http://www.bbc.com/news/technology-29475566 >> >> The www.FreeBSD.org project (a Unix OS similar to Linux) >> took just 2 days to develop & test a free solution. >> http://lists.freebsd.org/pipermail/freebsd-usb/2014-October/013304.html >> > > Can you also test that patch? > > Thank you! > > --HPS > > _______________________________________________ > freebsd-security@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-security > To unsubscribe, send any mail to "freebsd-security-unsubscribe@freebsd.org" >
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