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October 3, 2017

“Commands that show your Wifi passwords” roundup

Filed under: Sicherheit, UNIX/Linux/BSD — Tags: , , , , , , — martin @ 9:51 pm

With a hint of sensationalism, @DynamicWebPaige asks:

Did you know that “netsh wlan show profile” shows every network your computer has ever connected to? And “key=clear” shows the *passwords*?

Screenshot_1.png

No, I didn’t, and to be frank, I don’t care. But I recently played with NetworkManager on Linux and saw my Wifi passwords in discrete files under /etc/NetworkManager/system-connections/.

So here’s how to show stored Wifi passwords on Windows, Linux and MacOS:

Windows

We’ve already seen that it’s quite straightforward, if you’re able to start a cmd shell as the system adminstrator.

First, the list of used SSIDs:

netsh wlan show profile

Second, the password for any given SSID:

netsh wlan show profile <ssid> key=clear

Linux

We can safely assume that anyone who configures their wpa-supplicant manually won’t be surprised that the passwords are stored in clear. So let’s move on to NetworkManager, which is what most Linux desktop users will use to connect to Wifi networks. NetworkManager stores one file each for every made network connection in the directory /etc/NetworkManager/system-connections/, so the simplest approach is to just grep for the passwords, in order to receive a comprehensive list:

sudo grep -H psk= /etc/NetworkManager/system-connections/*

macOS

MacOS (whatever way it’s supposed to be capitalized this time around) makes the task quite hard, because the saved networks are stored in a property list and the passwords need to be retrieved from the key ring one by one.

Here’s how to list the SSIDs of the saved networks:

defaults read \
 /Library/Preferences/SystemConfiguration/com.apple.airport.preferences |
 grep SSIDString
And here is how to read a single password from the key store:
security find-generic-password -w -a <ssid>

So here you go, have cross-platform fun. 🙂

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May 11, 2008

They’re actually schlepping!

Filed under: fun — Tags: , , — martin @ 7:30 pm

Wie es (vielleicht auch nicht) ausgesehen hätte, wenn Starbucks schon vor 10 Jahren der Inbegriff für “Internetkaffee” gewesen wäre, zeigt dieser nette Röhrenmonitor-Flashmob bei Youtube: Mobile Desktop (Nein, kein Embed, da hab ich kein Bock drauf.)

“Three agents entered a Starbucks one by one with their own giant desktop computer and CRT monitor rig. They bought coffee and worked at their computers as if they were laptops. One computer even had a Wi-Fi card installed, enabling our agent to surf the web.”

Der Netzsheriff findet es bemerkenswert, daß kein Terroralarm ausgelöst wurde. Wenn das Bahnkunden in der DB-Lounge gewesen wären, hätten sie aber mindestens mal eine Anzeige wegen Stromdiebstahl abgekriegt.

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