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Print 47 comment(s) - last by althaz.. on Jan 3 at 4:41 AM

The Department of Homeland Security suggests the only solution is to disable WPS

NETGEAR, Inc. (NTGR), Cisco System, Inc.'s (CSCO) Linksys, D-Link Corp (TPE:2332), and Belkin, Inc. are some of the biggest makers of routers.  If you own a router, there's a good chance you own a router from one of these manufacturers.  And if you own a router from them, there's a good chance you used Wi-Fi Protected Setup (WPS) -- a PIN protected method -- to easily set up your home network.  And that means that there's a good chance your security is now at serious risk.

WPS was dreamed up by the Wi-Fi Alliance as a means of easing the pain of home networking.  But by including a flag in the EAP-NACK message, the standard unwittingly left a gaping hole that can be exploited by hackers to subvert your router.

The message tells the user if the first half of the pin they typed was right.  Thus it drastically reduces the time needed to crack the PIN using a brute force attack.  Add in that the last bit of the PIN is always its checksum, you have a recipe for a security disaster.

Linksys router
[Image Source: Best Wireless Internet Routers Blog]

The flaw reduces the time it takes to crack your average PIN from 108 attempts to 104+103 attempts (11,000 attempts total).  Assuming you can fire off ten requests or more a second, you should be able to crack routers in minutes.

The U.S. Department of Homeland Security (DHS) has issued a warning to the public about the flaw.  It advises disabling WPS.  This may be a painful option for less savvy operators, though, as setting up a network with more sophisticated protections can require a bit of learning.

Stefan Viehbock discovered the vulnerability and reported it to the DHS.  He claims that none of the major manufacturers stepped up to the plate with a patch.  He is going to release a C-coded exploitation tool shortly -- perhaps that will help prompt the business into action.

Sources: .BrainDump (Stefan Viehbock), Department of Homeland Security



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RE: Tip
By Christobevii3 on 12/29/2011 12:59:44 PM , Rating: 5
Your mac is openly broadcast by your devices and can be grabbed by any tool just about even if the stuff is "hidden". Once you have that you just change the mac and done.


RE: Tip
By Kurz on 12/29/2011 1:14:24 PM , Rating: 3
Gave up on MAC Security because of this. I use WPA2 and a nice 10 digit pass.

P.S. MAC Security is a pain in the ass to set up.


RE: Tip
By augiem on 12/29/2011 1:44:56 PM , Rating: 3
Everyone who wants to use my wifi hates me because of my 60+ character preshare key. :D


RE: Tip
By 3minence on 12/30/2011 10:36:13 AM , Rating: 2
What a fool you are! My 8 character is better than your 60+ character password! Wrong you think? Within range of my house are 3 totally unsecured Access Points. Who in the hell is going to bother cracking mine when they can connect to the others without cracking anything?

In this case, security is relative.


RE: Tip
By tastyratz on 12/29/2011 2:07:11 PM , Rating: 2
agreed, the longer the password the better.
I think the biggest hump to get over is people always think of password but not passwords. the most secure password isn't because you put a ! or $ in it, it's the longest password you can remember. odd char and caps make it MORE secure, but a longer string of multiple words is better.


RE: Tip
By Hyperion1400 on 12/29/2011 2:50:26 PM , Rating: 4
Correct Horse Battery Staple

http://xkcd.com/936/
(f'ing spam filter better let that link through...)

Anyway, Jason, wireless networking doesn't have to be difficult, people MAKE it difficult by not reading the instructions and giving up immediately. I can walk just a about any computer illiterate a-hole that can use a browser through it, over the phone, without(!) remote desktop support, in about 10 min.

Netgear: routerlogin.net/192.168.1.1>admin/password>cl ick "Wireless Settings" subcategory under "Basic">Type in what ever the hell you want your network to be called>Select WPA2-PSK>Enter in a pass and for the love of god remember it!

Linksys: 192.168.1.1>*blank*/admin>Basic Setup>Enter network name>Wireless>Security>Select WPA2 "Personal"(what ever the h*ll that means)>Enter in pass, same as above

Belkin: Buy yourself a Linksys or Netgear

All other brands: same as Belkin


RE: Tip
By iLLz on 12/29/2011 7:04:35 PM , Rating: 2
That Comic is wrong about the length of time it would take to crack that password. According to GRC's Password Haystack link posted in here by another, it would take 1.83 Billion Centuries to crack that password of Tr0ub4dor&3. There is capital and lowercase lettering and numbers and special characters.

Brute Force Search Space Analysis:
Search Space Depth (Alphabet): 26+26+10+33 = 95
Search Space Length (Characters): 11 characters
Exact Search Space Size (Count):
(count of all possible passwords
with this alphabet size and up
to this password's length) 5,748,
511,570,879,116,626,495
Search Space Size (as a power of 10): 5.75 x 1021
Time Required to Exhaustively Search this Password's Space:
Online Attack Scenario:
(Assuming one thousand guesses per second) 1.83 billion centuries
Offline Fast Attack Scenario:
(Assuming one hundred billion guesses per second) 18.28 centuries

What they did get right was that correcthorsebatterystaple takes longer with a time of 78.3 Billion Trillion Centuries, but that is only due to its length. Its 25 characters long but all lowercase lettering. If you add capital lettering and numbers and a symbol it makes it ridiculously long to crack.

Here is the one for correcthorsebatterstaple:

Brute Force Search Space Analysis:
Search Space Depth (Alphabet): 26
Search Space Length (Characters): 25 characters
Exact Search Space Size (Count):
(count of all possible passwords
with this alphabet size and up
to this password's length) 246,244,783,208,286,292,
431,866,971,536,008,150
Search Space Size (as a power of 10): 2.46 x 1035
Time Required to Exhaustively Search this Password's Space:
Online Attack Scenario:
(Assuming one thousand guesses per second) 78.30 billion trillion centuries
Offline Fast Attack Scenario:
(Assuming one hundred billion guesses per second) 7.83 hundred trillion centuries


RE: Tip
By iLLz on 12/29/2011 7:08:51 PM , Rating: 2
In the search space size to the power of 10 lines. They are:

5.75 x 10^21

2.46 x 10^35

Sorry the copy and paste didn't do exponentials properly.


RE: Tip
By Hyperion1400 on 12/29/2011 8:04:26 PM , Rating: 2
I really don't think they were intending it to be a mathematically perfect portrayal of brute-force hacking, but rather, an accurate analogy to disprove contemporary password logic. And, as you said, whether or not the math is right, the logic stands.

For my important stuff, like paypal, I use a 20 digit hex key...I don't think even God could brute-force hack that!


RE: Tip
By TrinityTP on 12/30/2011 8:44:41 AM , Rating: 3
No its correct. GRC's estimate is only valid if you pick numbers/letters/symbols at random. The point xkcd was making is people take a simple word "Troubadour" and replace a few letters with similar numbers and symbols "Tr0ub4dour" and add a number and/or symbol to the end. Common passwords have typically no more than about 2.5bits of entropy per character and a few number substitutions only add a few extra bits to the whole password.
Nobody would try to brute force the whole password keyspace as it would take too long so you use things like john-the-ripper to expand a common password dictionary with the standard substitutions people make.

So yet again Steve Gibson's security "advice" is less useful than a comic, he should have stuck to fixing hard drives he was actually good that that...


RE: Tip
By cochy on 12/29/2011 4:30:26 PM , Rating: 3
Good strong password creation tip here:

https://www.grc.com/haystack.htm


RE: Tip
By TrinityTP on 12/30/2011 8:48:10 AM , Rating: 2
Unless you can remember a truly random 10+ length password picked by a secure random password generator its not really good advice at all - more like highly misleading.


RE: Tip
By cochy on 12/30/2011 11:40:24 AM , Rating: 2
I don't follow what you are saying. What is misleading?


RE: Tip
By TrinityTP on 12/30/2011 8:05:55 PM , Rating: 2
Well at least Gibson specifies that it is not a strength meter (he's right it isn't) but calls it a keyspace meter instead (which is basically the same thing by another name). So having pointed out that is doesn't measure the password strength then goes on to describe how long it would take to brute force it. See the contradiction???

Keyspace (as calculated by that page) is irrelevant unless it represents the process of generating a key. For example, take a lowercase letter followed by 1234567879, that is a 10 character alphanumeric password but only has a keyspace of 26 (i.e. [a-z]123456789) and not (26+10)^10.
Basically don't reference that page (or that site), period. Ironically xkcd makes far better suggestions (as long as the password field is big enough).

P.S.
For Wifi a 19+ length random mixed case alphnumeric password is basically totally overkill ( ~113bits of security) since with 4096 rounds of PBKDF2 hardening we are nearly at the 128bit security level (the level that even thermodynamically speaking would require the entire planet's energy output for nearly a decade for a perfectly efficient computer to simply count to that number let alone actually SHA1 hash something that many times). Makes 256bit security look a bit silly really doesn't it?


RE: Tip
By TrinityTP on 12/30/2011 8:29:11 PM , Rating: 2
Sorry Cont...
As far as his actual password generation advice goes: its complete drivel! People are far more predictable than we like to think (I have don't several password audits and EVERYONE uses the exact same substitutions - no sorry none of you are at all original). This the reason tools like john-the-ripper exist, Gibson is stating something know to be factually wrong. Do not use his advice, its very bad. Don't use words with substations they are just not secure. Ideally try Diceroll or failing that try dingbats type representations of a long nonsensical passphrase (that is unique to you) movie quotes etc.

e.g.

Cheese but not Ties repel Cats because they are bigger than peas = Chse!&->"_">ppp
using "_" for a cat as it reminds me of the Cheshire cat in Alice in wonderland
and & for a tie


RE: Tip
By TrinityTP on 12/30/2011 8:31:22 PM , Rating: 2
Arrg sorry that should read "NO movie quotes".


RE: Tip
By Trisped on 12/29/2011 5:50:19 PM , Rating: 3
While your MAC is broadcast all over your LAN, those not yet on the LAN (or WLAN) will not yet know it due to encryption of your wireless network.

So in short, a MAC filter list is not a replacement for network encryption (like WPA or WPA2) but it can enhance the security of your network.

Note: I do not recommend WPA as WPA2 has been out long enough that everything supports it, and anything which does not probably has other security issues.


RE: Tip
By TrinityTP on 12/30/2011 8:57:07 AM , Rating: 3
No sorry, the MAC is sent in the clear even with encryption since its how your wireless radio knows the packet is intended for it.

MAC filtering is like a party with a strict guest list where the guest list is on a poster outside the venue.


RE: Tip
By ChronoReverse on 12/30/2011 12:15:24 PM , Rating: 2
And where the "ID" isn't something like a secured ID card or 3D facial recognition but a pencil scrawl on a scrap of paper =)


RE: Tip
By Alexvrb on 12/30/2011 7:58:30 PM , Rating: 2
I use smiley faces.

"Ah, Mr. Frown, we've been expecting you. Strangest thing, I thought I saw you go inside just a moment earlier with Mr. Big Grin. But what the hell do I know, I'm just a stupid router."

So yeah, if they can break your WPA2 (or bypass it entirely with an exploit like this WPS PIN fiasco), MAC filtering won't do jack.


RE: Tip
By TrinityTP on 12/30/2011 8:11:29 PM , Rating: 2
Reservoir Dogs had it right. You are Mr. Pink!

Abstract icons are just a bit too taxing for some these days...


“Then they pop up and say ‘Hello, surprise! Give us your money or we will shut you down!' Screw them. Seriously, screw them. You can quote me on that.” -- Newegg Chief Legal Officer Lee Cheng referencing patent trolls

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