Microsoft has released an out of band patch to fix the "Meltdown" vulnerability on 3rd of Jan 2018. More details of the patch can be found on the official KB4056892 page.

This patch is available only for Windows 10 OS. The patch will install automatically once the PC connects to internet.

 

There has been multiple reports of some application not being compatible with this latest patch. Certain Antiviruses are causing blue-screen after installing the Meltdown patch.

There has been reports of some SSL VPN applications not connecting to the server after the patch is applied

Antivirus vendors are releasing patch to fix the compatibility issues but it may take a few days for all of them to be available.

I would recommend you to update all the important application installed on the PC before applying this patch to prevent any incompatibility issues.

If you the patch is already installed and there is some critical application causing issues, you can try to uninstall the patch and check if the application works without this patch.

 

Spectre

Spectre is the latest vulnerability discovered in processors which allow amalicious application to trick another application into exposing its memory to read by the malicious application.

This vulnerability affects almost all the processor variants from Intel/AMD/ARM. Which means that all computers both Desktop/Laptop and SBC and all the smartphones are affected by this Vulnerability.

 

More information about this vulnerability can be found at https://spectreattack.com/

CVE-2017-5753 and CVE-2017-5715 are the official references to Spectre. CVE is the Standard for Information Security Vulnerability Names maintained by MITRE.

All OS manufacturers are releasing patches to fix these vulnerability, You can follow below steps to update the OS and patch the vulnerability.

Fix the Spectre on a CentOS/RHEL/Fedora/Oracle/Scientific Linux

Type the following yum command:

sudo yum update

You must reboot your Linux server using shutdown/reboot command:

sudo reboot

Run the following dnf command if you are using a Fedora Linux:

sudo dnf --refresh update kernel

OR

sudo dnf update

Reboot the Linux box:

sudo reboot
.

Fix the Spectre on a Debian/Ubuntu Linux.

Use the following apt-get command/apt command:

sudo apt-get update
sudo apt-get upgrade
sudo shutdown -r 0

Fix the Spectre on an Amazon Linux running on AWS

Just run yum command:

yum update kernel

 

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.