Recently  Mathy Vanhoef of imec-DistriNet has discovered a vulnerability in WPA2 standard which enables a Man in the Middle to sniff and decrypt packets over the wireless network. The details about this vulnerability is provided on https://www.krackattacks.com/

WPA2 is used to secure the wireless communication between the clients and access point. It was considered as unbreakable untill this vulnerability is discovered. Here are the key things you should know about this vulnerability.

The Positive

  • This vulnerability cannot be exploited remotely. The attacker or his device must be close enough to connect to the targeted wireless network to run the attack. This limits the effect of this vulnerability significantly.
  • There has been no reports of this vulnerability being exploited in the wild, yet.
  • This only enables the attacker to decrypt the wireless frames and expose the payload. Is the communication is over HTTPS/TLS the attacker can still not decrypt the payload and all of your communication data is still safe.
  • The vulnerability was discovered many months ago and was communicated to many vendors whose products are vulnerable. So the patches will be available soon.

The Negative

  • This vulnerability effects every client device that uses wireless as the vulnerability is in the WPA2 standard.
  • There are no patches available to fix it at this moment so till the time the device vendor releases a patch the wireless communication is prone to this attack.
  • This enables the attacker to get private information over wireless communication if the payload is sent over plain text/http protocol.
  • Though the HTTPS communication is safe from this attack, it still exposes your DNS traffic which is in clear text.
  • The attacker can modify the DNS traffic and can redirect you to a malicious website.

Things you should do to keep yourself safe from this attack.

  • Keep an eye on any update released by your device vendor, patch the device as soon as an update is available.
  • Do not send any private information like Username/Password, account login, Payment information, personal details over unencrypted connection. Always check of the website you are submitting the details is using HTTPS for encrypting all the communication related to private information.

  • Ensuring this green lock button on the browser is even more important now as the attacker can modify DNS traffic and redirect you to a malicious website. If that is the case you will get a certificate error on the browser. Do not proceed if your web browser warns you about any problems with the website certificate.
  • If possible always use VPN when connected over wireless, so that all the communication over wireless is protected by an extra layer of VPN encryption.
  • For the paranoids, keep yourself from using wireless at all until this vulnerability is patched.

A new android Malware has been found by Trend Micro which it claims is a successor to a Dress Code malware found earlier.

This malware uses port 22 to establish a SSH session with its Command and Control (CnC) server owned by the attacker.

As it uses SSH all the data between the Android phone and its CnC server are encrypted which makes it difficult for the enterprise security infrastructure to detect it. Security solutions cannot detect the data inside the encrypted connection unless they are doing Deep Packet Inspection of SSH traffic.

MilkyDoor Vulnerability

                                                                                    How MilkyDoor Malware Works

 

Using this SSH session the attacker can run vulnerability scan on the internal network. This is important as many enterprise allows employees to use their own phones connected to the same network as the internal infrastructure.

MilkyDoor was recently found in over 200 Android applications available through the Play Store.

It is important for the enterprise security gateway solutions to block all ports for the BYOD network except the ports necessary.