Questions tagged [wifi]

Security for 802.11 wireless networks.

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6answers
657 views

Doing a demo about open wireless networks exploiting with Firesheep

A collegue and I have been asked to do a demo where we show off stealing Facebook sessions with Firesheep. I've never used Firesheep before myself, but I reckon it should be a simple task. I know the ...
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6answers
6k views

Are smartphones at least as safe as “regular” computers for personal data?

Like a lot of people, I pretty much run my life on the Web these days. I use online bill pay, I shop at Internet retailers, I keep in touch with friends electronically, &c. I'm pretty comfortable ...
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2answers
2k views

What security risks do unauthorized mobile hotspot (MiFi) devices on company proprerty pose?

I'm having some difficulty determining how, or if, MiFi devices on property should be regulated. Personally, I see them as having little difference from any other rogue AP in the environment - the ...
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1answer
17k views

Why is a CA certificate required for EAP-TLS clients?

When setting up clients with WPA2 EAP-TLS, most clients (ie: my phone, my computer) require both a client public/private keypair (for obvious reasons) and a certificate authority certificate. It's ...
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3answers
5k views

How do WPA/WPA2 cracking programs know when the PMK/PTK is correct?

I'm doing some pen-testing on my home wlan with aircrack-ng and it got me wondering how programs like these(eg. aircrack-ng, cowPatty, pyrit etc) really work. Specially, when performing a dictionary-...
8
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1answer
729 views

Can hand/finger movements be determined via changes in WiFi signal strength?

On a password generator website I came across the following claim among a list of security tips: If there are WIFI routers in your home, then it's possible to know the passwords you typed (in your ...
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3answers
2k views

Can my school see exactly what I’m doing? [duplicate]

My school requires us to install digicert global root CA and digicert sha2 secure server to access to the secure and guest WiFi onto our personal devices. Does this mean that the school can see the ...
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5answers
2k views

Use WiFi tracking to identify burglars

Recently I had the following idea. I live in a rural area where few people pass in front of our house. Burglars like such areas, because the chance of being seen breaking into a house is small. ...
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2answers
5k views

What is the best way to protect a captive portal againt MAC spoofing

What is the best way to protect a captive portal againt MAC spoofing? The MAC Address appears one of the only ways to distinguish wireless clients from one another, anything one authenticated client ...
8
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1answer
8k views

WiFi Deauth Attack equivilent for bluetooth?

I have used WiFi deauthentication attacks in the past to successfully knock WiFi connected-devices off of my LAN network. As far as I can tell, the attacker just spoofs a client and sends the access ...
8
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1answer
17k views

Bypassing a captive portal with tor

I know that NSXTS and Iodine can be used to bypass a captive portal by taking advantage of permissive DNS firewall rules. What I have found recently is that simply by using Tor, I can also bypass a ...
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3answers
1k views

Avoiding Wifi attacks

I read that Wifi network cards when disconnected are constantly sending probes to check if any known AP is around. This means that a hacker could capture those probes and simulate one of the ...
8
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1answer
1k views

Linux wireless hacking book

I am looking for recommendations on a good wireless hacking book. I would like something more focused towards the defensive, but a healthy knowledge of both would be great. I would also need it to go ...
8
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1answer
799 views

Triangulate a MAC address

Last Sunday my iMac was stolen by a burglar. On Monday it showed up on 'find my mac'. Good police work and a lot of luck ended up in me retrieving my device that was on a location more than 50 meter ...
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1answer
5k views

What makes PINless Wi-Fi Direct using WPS on Android secure?

I've read from Wikipedia that Wi-Fi direct uses WPS (Wifi Protected Setup), and I know that in Android (at least what I have which is 4.0.1 on Galaxy S3) uses the WPS method of the "push button" to ...
8
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1answer
138 views

Is it possible to determine router firmware version as a Wi-Fi client?

Let's say that I'm connected to some random Wi-Fi network and from that point I want to check the version of currently installed firmware, but let's exclude possibility of logging in with default ...
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2answers
3k views

Dictionary Attack on Wifi

I know a few people with pretty weak passwords. What kind of systems exist to prevent dictionary attacks? Would it make sense to restrict the number of connection attempts in a certain timeframe? ...
7
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5answers
3k views

How to keep secure while browsing on open wifi when SSL VPN is blocked?

After a recent visit to a hotel I was surprised to discover that they blocked access to my OpenVPN server. I often use this as a way to secure my internet traffic when I am on public wireless. ...
7
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2answers
3k views

Devices with cryptic names and Chinese ip addresses connected to my router

Please see image. Does anyone have any idea of whats going on? They come and go as attached devices in my attached devices list. I also attached my routers log for you all to see. http://pastie.org/...
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1answer
10k views

802.11w protected management frames - Wi-Fi

I've been reading about protected management frames, introduced in 802.11w, and had a few questions. Apparently, a message integrity check is provided with de-authentication frames, allowing either ...
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2answers
30k views

Detecting the presence of wifi devices

Is it possible, with a normal wifi adapter, to detect present wifi devices in the surrounding? Let's say, is it possible to detect an Iphone with wifi switched on in the range of my wifi adapter? ...
7
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5answers
3k views

Defending against wifi spoofing

Since a few weeks, someone is regularly running a wifi network copying the SSID and BSSID of my private router, resulting in some anoyance, due to being kicked out of my own network from time to time....
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2answers
2k views

Privacy of my company's guest Wi-Fi [duplicate]

I use my company's guest Wi-Fi along with another maybe 1500 other people across our site. On my breaks I access some random chat servers. Can my company see and hear my conversation?
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3answers
7k views

How to detect whether my network's key is being attempted to be cracked?

I use WPA2 encryption. But I know even that can be cracked with the aircrack suite. And a lot of users may not use strong passwords. I've read that while cracking WIFI keys the only noticeable ...
7
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4answers
2k views

Why don't wifi managers remember mac addresses for hotspots to defeat the jasager attack?

So I just learned about the jasager attack, via the wifi pineapple and it struck me immediately that it wouldn't work at all if network managers (privately) associated MAC addresses with hotspots and ...
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2answers
16k views

In inSSIDer, what is the difference between WPA2-CCMP and RSNA-CCMP?

inSSIDer shows my wireless network as RSNA-CCMP. The settings on the wireless router (Linksys E2000) do not at all seem to suggest an "RSNA" security option. The security filtering options in ...
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2answers
4k views

How should captive portals redirect?

I recently read this question, which makes me wonder a follow up question: how is this captive portal likely trying to redirect the user? A highly voted comment does say that it's doing it wrong, ...
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1answer
6k views

Are strong WPA2 passwords “good enough” for WiFi security?

I'm currently using WPA2-PSK with CCMP on my home WiFi network for encryption and security. I was a big fan of MAC filtering, until I realized that MAC addresses are publicly sniffable in the 802.11 ...
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2answers
4k views

Discovering IP or Mac address of mobile devices passing by.

Is it possible for someone to discover the IP and/or MAC address of my mobile device, even if I do not attempt to connect to their network?
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1answer
3k views

Hotspot with same SSID, how does authorization work?

My university has a wireless network I log into with my username and password. It's using PEAP. My phone and laptop automatically connect to this SSID when they detect the network. If someone sets up ...
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2answers
13k views

Estimated cost to make a brute-force WPA2 attack feasible

It's been shown that a brute-force attack on WPA2-Personal is possible in a reasonable amount of time. These successful attacks appear to be limited, however, to researchers who have the budget to ...
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3answers
213 views

Getting automatically logged in to others session via Wi-Fi

Recently, I experienced a very strange behaviour on our Wi-Fi network: we share a Wi-Fi network using a simple router. One of us pays the bills and he's the one, who got the management account from ...
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1answer
2k views

Is a public known password protected Wifi more secure than one without a password?

When connecting to a public Wifi from a café for example, some don't use a password and some do. If they do use a password it is often publicly known to everybody around. Does having a password on ...
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1answer
1k views

Did iOS 11.1 fix KRACK for only iPhone 7 and newer?

This security article from Apple says that 11.1 fixes the KRACK vulnerability for iPhone 7 and newer devices. But what about the older devices? Has Apple not fixed them or does the vulnerability not ...
7
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1answer
753 views

Do cellphones periodically send a “hello” msg to nearby WiFi APs?

I recently stumbled on this site, offering cell phone detection solutions: http://www.libelium.com/products/meshlium/smartphone-detection/ Where they state that: Users have to do nothing to be ...
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2answers
1k views

Why do phones send wifi probes?

They could just listen to beacons. Why do they probe for every network you've ever connected to? Do other wireless devices do this? Does Windows, Linux esp. Kali, do this?
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2answers
2k views

Stealing WiFi Internet connection

I received a mail about illegally sharing copyright-protected material on the Internet; I never did it. I checked my router's configuration and noticed that the MAC address of one of the connected ...
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4answers
2k views

Has my network/computer been breached?

I'm not sure if this is the right site to ask, so I apologise if it isn't, but here goes. A while ago I started noticing some odd behaviour. My Gmail account was compromised, it seemed, and I had to ...
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1answer
1k views

How does WifiKill work?

How is possible for Wifi Kill to block someone from using Wi-Fi, even if you don't have access to the router settings and you even don't use MITM (I think)?
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2answers
432 views

Does a WPA2-PSK authentication only succeed if both parties know the pre-shared key?

Normally people think of WiFi authentication as the client proving to the AP that it knows the pre-shared key. But does the AP also prove to the client that it knows the pre-shared key? Is it ...
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1answer
3k views

Deploying a campus WiFi network that authenticates against an AD LDAP

We are looking to deploy about 15-20 Cisco 1131ag access points on campus. I have been reading up on different authentication methods, but I don’t know what will be the best long term solution that ...
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1answer
1k views

How to get hold of and use WPA session keys?

I'm testing sniffing and decrypting my WPA2 wifi network traffic. But when using airdecap to decrypt the capture file (created by airodump) using my WPA passphrase I only get broadcast traffic. If I ...
7
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1answer
803 views

Why do Android and iOS not let users view wifi passwords?

On Windows, admin users can view saved wifi passwords. I know that by rooting the device, it is possible to view them on Android and iOS, but usually, rooting is simply not an option. So, why don't ...
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1answer
330 views

How to provide user friendly WiFi access to gym members with WPA2 Enterprise?

Background A friend of mine is the owner of a medium sized gym. He wants to provide WiFi to his customers and asked me to come up with a concept and eventually also deploy it. As a computer scientist ...
7
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1answer
571 views

Preventing evil twin WiFi attacks on embedded systems

I've recently been looking at a few of the low-end WiFi modules used in IoT devices, such as the TLGUA06 and ESP2866. As expected, it's possible to deauthenticate these devices by sending a ...
7
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1answer
471 views

Is the GTK or MIC in the unencrypted portion of a WPA protected frame?

In order to decrypt traffic you must have all 4 portions of the WPA Handshake. In WPA protected data frames, is there an unencrypted portion of that frame that has some sort of identifiable value to ...
6
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3answers
21k views

Intercepting wifi traffic

So people always talk about how if you use http over a shared wifi hotspot, people will be able to see your unencrypted data, but I have never been able to make the direct connection from a network ...
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4answers
2k views

How can one defend against DoS attacks at the physical layer?

Of course, there's always the odd issue of old microwaves and wireless telephone handsets interfering with Wi-Fi performance. And, in many areas, there's a fair chance that you're going to have to ...
6
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7answers
26k views

How to choose a good (and easy to use) WiFi password?

Over the last few months I have had to enter WiFi passwords into smart phones, TVs, printers, etc. None of these have real keyboard and they make it hard to enter long passwords or passwords that ...
6
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2answers
5k views

Wireless hardware with limited range?

I have never used wireless networking at home, but am considering it. Does anyone make wireless hardware designed for single-room connectivity? Several sources have recommended WPA2, but I'd still ...