Wireless Analysis With Monitor Mode On Android

An anonymous reader writes "We are a group of three researches, and in the last few weeks, we have been working on Wi-Fi monitor mode for Android devices, based on Broadcom BCM4329 and BCM4330 chipsets. Currently we have a successful PoC for Nexus One and Samsung Galaxy S 2. We've released all the info in our new blog."

Comments

You Brick My Phone

[smittyoneeach]

You brick my phone
(And I'm not alone)
We'll find us time
For Amish crime
Burma Shave

Seriously: great project. As I'm connected using a Galaxy S 2 in hotspot mode as I write this, I may need to have a go at this project.

Strengthen your passwords

[AmiMoJo]

With modern graphics cards dictionary attacks on WPA2 passwords are realistic. Since everyone carries wifi radios around with them and can gather the necessary data you should probably expect more such attacks on your network in the future.

Re:Strengthen your passwords

[fuzzyfuzzyfungus]

It doesn't help entities that are likely to be targets of directed attacks(either high value institutional targets, who ideally aren't using PSK and are rotating passwords properly, or people with psycho and/or prankster neighbors); but the easiest way to keep people out of your network, for most of us, might actually to be to give them some of what they want.

APs with multiple radios, or chipsets capable of handling multiple SSIDs with distinct security and routing rules, are increasingly common and cheap. If you broadcast an open SSID(all traffic originating from there QoS tagged as lower priority than traffic from your internal network, naturally) that dumps anybody who connects straight to the internet, no connection to the internal network or router configuration interfaces(through Tor if you are really worried about somebody's warez and/or kiddie porn pointing back to you), that removes the bulk of most people's interest in cracking your network itself...

Re:Strengthen your passwords

[L4t3r4lu5]

WPA2(AES) is the most secure, as long as your vendor implemented it properly.

Re:Strengthen your passwords

[Penurious Penguin]

It uses the aircrack suite and supports injection. I imagine if people write convenient scripts for this software, it could get pretty popular. I've never owned a smartphone and don't know what their ranges are, but if they are close to a half-height mini-PCI, then this is a pocket sized menace indeed. Throw in the Cloud, rainbow tables, mega dictionaries and so on, and you get action. I have no doubt that many people will use such an application just as a novelty (because they can) -- but others may opt for more. Of course, those who don't use common ESSIDs and use peculiar passwords along with WPA2, they should have nothing to worry about. The rest, however, should definitely start with stronger passwords.

For example, someone can crack your WEP regardless of your password; but to enter the router where the real fun can begin, they would encounter great difficulty if a strong password and unique user ID were set. Verizon figured this out some time ago. A strong password could limit an "attacker" to simply using your network. While stronger passwords are a good idea, it shouldn't be one's only recourse though.

Re:Strengthen your passwords

[spectrokid]

Use AES with a very long random gobbledigook password. Write the password down on the back of your router. from wikipedia:
Weak password Shared-key WPA remains vulnerable to password cracking attacks if users rely on a weak password or passphrase. To protect against a brute force attack, a truly random passphrase of 13 characters (selected from the set of 95 permitted characters) is probably sufficient.[12] To further protect against intrusion, the network's SSID should not match any entry in the top 1000 SSIDs[13] as downloadable rainbow tables have been pre-generated for them and a multitude of common passwords.

Re:Strengthen your passwords

[DickBreath]

That is good advice. After you determine what you will use as a long cryptic password, you should set the SSID to be the same as the password to eliminate the possibility of forgetting the password. Also when guests are over, it is easy to tell them that the password is the SSID that their phone/laptop/tablet just scanned. Since the scanned SSID still has a lock icon next to it in the list of nearby WiFi routers, it is secure.

Re:Strengthen your passwords

[Penurious Penguin]

And how much time would you need to crack a password such as:
GrimTittyPat00shkinGarment
?
Time is all we have. Why squander millennia on a mediocre password? Also, it's not the weakness of passwords, but the weakness of protocols here. Install proper firmware that does not support WPS and REAVER becomes little more than aircrack. With a solid WPA2 setup on open-wrt, I'd relax and not even bother monitoring my network traffic whilst surrounded by hostile REAVER users.

Re:This article is plain spam.

[fuzzyfuzzyfungus]

This article is plain spam.

Wait: an article about some guys who reverse engineered a (very common) broadcom wireless chipset to add monitor mode to a linux kernel driver(complete with source and instructions on how to brick your own phone) is 'spam'?

What is slashdot for, if not trolling and arguing about linux drivers?

Re:N900

[fuzzyfuzzyfungus]

"As you know, ah, you write software to go with the hardware you have---not the hardware you might want or wish to have at a later time."

Re:This article is plain spam.

[kelemvor4]

This article is plain spam.

Wait: an article about some guys who reverse engineered a (very common) broadcom wireless chipset to add monitor mode to a linux kernel driver(complete with source and instructions on how to brick your own phone) is 'spam'?

What is slashdot for, if not trolling and arguing about linux drivers?

I agree, this article = "News for Nerds."

Re:BREAKING NEWS: SLASHDOT SOLD TO DICE

[smittyoneeach]

Fool!
"Man, Dice got rolled."

Re:This article is plain spam.

[Penurious Penguin]

When I don't prefer my spam with eggs, I often prefer my spam with plain spam. Nothing wrong with spam, is there? What more could you ask for anyway? It's already an exciting 3D representation of an entire pig stuffed into a single tin, with a few elements of modern science added.

~ Plain Spam - The Number One Choice for Spam Purists Since 1970