Hacking Vulnerability in All WiFi Networks

[vc_row][vc_column][vc_column_text]The security protocol that isvused to protect the vast majority of wifi connections has been broken, potentially exposing wireless internet traffic to malicious eavesdroppers and attacks, according to the researcher who discovered the weakness.

Mathy Vanhoef, a security expert at Belgian university KU Leuven, discovered the weakness in the wireless security protocol WPA2, and published details of the flaw on Monday morning.

“Attackers can use this novel attack technique to read information that was previously assumed to be safely encrypted,” Vanhoef’s report said. “This can be abused to steal sensitive information such as credit card numbers, passwords, chat messages, emails, photos and so on.

Vanhoef emphasised that the attack works against all modern protected wifi networks. Depending on the network configuration, it is also possible to inject and manipulate data. For example, an attacker might be able to inject ransomware or other malware into websites.”

The vulnerability affects a number of operating systems and devices, the report said, including Android, Linux, Apple, Windows, OpenBSD, MediaTek, Linksys and others.

“If your device supports wifi, it is most likely affected,” Vanhoef wrote. “In general, any data or information that the victim transmits can be decrypted … Additionally, depending on the device being used and the network setup, it is also possible to decrypt data sent towards the victim (e.g. the content of a website).”

Vanhoef gave the weakness the codename Krack, short for Key Reinstallation AttaCK.

Britain’s National Cyber Security Centre said in a statement it was examining the vulnerability. “Research has been published today into potential global weaknesses to wifi systems. The attacker would have to be physically close to the target and the potential weaknesses would not compromise connections to secure websites, such as banking services or online shopping.

“We are examining the research and will be providing guidance if required. Internet security is a key NCSC priority and we continuously update our advice on issues such as wifi safety, device management and browser security.”

The United States Computer Emergency Readiness Team (Cert) issued a warning on Sunday in response to the vulnerability.

“The impact of exploiting these vulnerabilities includes decryption, packet replay, TCP connection hijacking, HTTP content injection and others,” the alert says, detailing a number of potential attacks. It adds that, since the vulnerability is in the protocol itself, rather than any specific device or software, “most or all correct implementations of the standard will be affected”.

The development is significant because the compromised security protocol is the most secure in general use to encrypt wifi connections. Older security standards have been broken in the past, but on those occasions a successor was available and in widespread use.

Crucially, the attack is unlikely to affect the security of information sent over the network that is protected in addition to the standard WPA2 encryption. This means connections to secure websites are still safe, as are other encrypted connections such as virtual private networks (VPN) and SSH communications.

However, insecure connections to websites – those which do not display a padlock icon in the address bar, indicating their support for HTTPS – should be considered public, and viewable to any other user on the network, until the vulnerability is fixed.

Equally, home internet connections will remain difficult to fully secure for quite some time. Many wireless routers are infrequently if ever updated, meaning that they will continue to communicate in an insecure manner. However, Vanhoef says, if the fix is installed on a phone or computer, that device will still be able to communicate with an insecure router. That means even users with an unpatched router should still fix as many devices as they can, to ensure security on other networks.

Alex Hudson, the chief technical officer of subscription service Iron, said that it is important to “keep calm”.

“There is a limited amount of physical security already on offer by wifi: an attack needs to be in proximity,” Hudson wrote. “So, you’re not suddenly vulnerable to everyone on the internet. It’s very weak protection, but this is important when reviewing your threat level.

“Additionally, it’s likely that you don’t have too many protocols relying on WPA2 security. Every time you access an HTTPS site … your browser is negotiating a separate layer of encryption. Accessing secure websites over wifi is still totally safe. Hopefully – but there is no guarantee – you don’t have much information going over your network that requires the encryption WPA2 provides.”

There’s likely to be a delay before the vulnerability is used to actually attack networks in the wild, says Symantec researcher Candid Wuest. “It’s quite a complex attack to carry out in practice, but we’ve seen similar before, so we know it’s possible to automate.

“Small businesses and people at home should be concerned, but not too worried,” Wuest added, advising most users to simply apply the updates to their software as and when it becomes available.

The most important lesson from the weakness, he said, was that relying on any one security feature is risky. “You shouldn’t be trusting one single point of failure for all your security. Don’t rely on just your wifi, use a VPN or secure connection for anything important.”

Different devices and operating systems are impacted to differing degrees based on how they implement the WPA2 protocol. Among the worst hit are Android 6.0 (Marshmallow) and Linux, due to a further bug that results in the encryption key being rewritten to all-zeros; iOS and Windows, meanwhile, are among the most secure, since they don’t fully implement the WPA2 protocol. No tested device or piece of software was fully immune to the weakness, however.

The international Cert group, based at Carnegie Mellon University, informed technology companies of the flaw on 28 August, meaning that most have had around a month and a half to implement a fix. The Guardian has asked Apple, Google, Microsoft and Linksys the status of their patches. Google said: “We’re aware of the issue, and we will be patching any affected devices in the coming weeks.” Microsoft said: “We have released a security update to address this issue. Customers who apply the update, or have automatic updates enabled, will be protected.” No other vendor has replied at press time.[/vc_column_text][/vc_column][/vc_row]

How to Turn Your Computer Into a Wi-Fi Hotspot in Windows 10

How to Turn Your Computer Into a Wi-Fi Hotspot in Windows 10

By Melanie Pinola, Mobile Office Expert
You might sometimes find yourself with just one internet connection point--a single wired connection for your laptop at the hotel, for example, or your smartphone tethered over USB to your computer. But what if you have other devices that need internet access, such as your Wi-Fi-only tablet or your friend's or family member's laptop? The good news is you can share your laptop's wired or mobile broadband internet connection wirelessly with other devices.
The bad news is, with Windows 10, it takes a bit of trickery in the command prompt to turn your computer into a Wi-Fi hotspot.
To share your computer's internet connection, you'll need to open the command prompt in administrator mode and type in a few commands. The instructions below were adapted from the excellent guide on NirmalTV, which offers screenshots of the process.
  1. Open the command prompt in administrator mode by right-clicking on the Windows Start button and selecting "Command Prompt (Admin)". Alternatively, you can use this keyboard shortcut: Windows key + X (Win+X) then select the Command Prompt (Admin) option.
  2. When the "Administrator: Command Prompt" window opens, type the following command: netsh wlan set hostednetwork mode=allow ssid=[networkSSID] key=[password]. Replace the "networkSSID" and "password" fields with the name you want for your new Wi-Fi hotspot network and its password (you'll use these to connect other devices to your computer's Wi-Fi hotspot). Then hit Enter.
  3. Next, type in the following command to start the network: netsh wlan start hostednetwork and hit Enter. This enables and starts the ad-hoc wireless network connection.
  4. Next, head to your Windows' network connections page (type in "network connections" in the search field in the taskbar in Windows 10 and click on "View network connections" or navigate to the Control Panel > Network and Internet > Network Connections).
  5. Right-click on the network connection that is your computer's source of internet access (e.g., the ethernet connection or the 4G broadband connection).
  6. Choose "Properties" from the context menu.
  7. Go to the "Sharing" tab and check the box next to "Allow other network users to connect through this computer's internet connection"
  8. From the dropdown list, select the Wi-Fi connection you just created.
    Hit OK and close the properties window.
You should then see your Wi-Fi hotspot in Windows 10's network and sharing center. From your other devices, select the new Wi-Fi network in the wireless settings and enter the password you set to connect to it.
These command prompt steps for setting up an ad-hoc network aren't as user-friendly as having a built-in method with a graphic user interface, but it's what we have so far in Windows 10 and will do in a pinch.
If you're using an older version of Windows or are on a Mac, you can accomplish this "reverse tethering" in other ways:
Finally, to stop sharing your internet connection over the new Wi-Fi hotspot you created in Windows 10, enter this command in the command prompt: netsh wlan stop hostednetwork
Source: http://mobileoffice.about.com