Tag Archives: site isolation

ALERT! – Specter and Meltdown Security Flaw – ALERT!

Regardless of what computer you own, Apple or Windows, Spectre and Meltdown security flaws affect you. Security researchers recently revealed the details of these two microprocessor security flaws. Chips made by Intel, Advanced Micro Devices (AMD) and others are in billions of devices making them sitting ducks for hackers.

Devices with these chips include phones, tablets, PCs, and computer servers. Exploiting the vulnerability opens the door for hackers to steal personal data, passwords, cryptographic keys, and other supposedly inaccessible information from device owners. While the average consumer should exercise caution the impact on business could be devastating. 

The Meltdown flaw only runs on Intel chips while the Spectre flaw can affect devices with virtually any modern processor.

Computer microprocessors handle data like a passwords or encryption keys. Normally these are kept from other apps. But both Intel and AMD pride themselves on the speed of their chips. To do this the chips use whats known as “speculative execution” to try to guess answers that may be needed if a chain of calculations came out a certain way. Since the delay in calculations can be predictable researchers found that a rogue app could guess where confidential data was located in a chip’s memory and steal it.

Regardless of your web browser, Google Chrome, Apple Safari, or any version of the Windows family, they all use Javascript code.  Hackers could introduce a data stealing Javascript program and post it on any chosen web site. Your browser app would automatically run the rogue code like it was an ordinary part of the site’s features resulting in your data becoming vulnerable or stolen. As you can see this is an extremely grave threat to business computing.

Although this vulnerability is now known there is no evidence anyone has used it…yet. And that is where the danger lies. The danger of these flaws is so great that tech companies  swung into action quickly to fix the problem. Perhaps too quickly.

According to various news sources the Microsoft patch to fix the flaw has been damaging some devices.  In some instances the computers are suffering performance problems while others have been bricked. A bricked computer is frozen and unusable. The problem has become so bad that Microsoft has halted issuing the patch for both Spectre and Meltdown for AMD equipped computers and devices.

Intel’s CEO Brian Krzanich addressed the Meltdown and Spectre issue as the keynote speaker at the Consumer Electronics Show in Las Vegas. “I want to thank the industry for coming together to address the recent security research findings reported as Meltdown and Spectre,”  said Krzanich. He called the response to the issues a “collaboration among so many companies.” Krzanich promised that “for our processors and products introduced in the past five years, Intel expects to issue updates for more than 90 percent within a week, and the remaining by the end of January.”

Browser makers have swung into action to combat the flaw. Users of Google Chrome should turn on a feature calledsite isolation.”  The feature prevents malicious Javascript from accessing sensitive data. Google will soon release an update to Chrome’s Javascript feature that will improve protection against Spectre attacks, however, browser performance may suffer.

Microsoft has already issued a Windows security update for its Internet Explorer and Edge browser apps labeled “KB4056890” to protect against Spectre. According to Microsoft the update will change the browser’s features to protect confidential information in a device’s CPU. But make sure you check if your device has an AMD chip before using this patch.

Firefox maker Mozilla said its newest apps changed several features to make Spectre attacks more difficult. Released on January 4th, Firefox version 57.0.4 includes the new protections. Mozilla said in a blog post that it is studying additional ways to strengthen security against the attacks. “In the longer term, we have started experimenting with techniques to remove the information leak closer to the source, instead of just hiding the leak by disabling timers. This project requires time to understand, implement and test.”

Apple is planning to release an update to Safari in “coming days” to protect against Spectre. Early tests of the Apple updates showed a minimal impact on browser performance. For additional information on Apple products click here.