Information on CVE-2015-5154

Overview

Information on CVE-2015-5154 was made public on July 27, 2015. The vulnerability is in QEMU, a generic and open source machine emulator and virtualizer that is utilized by Xen, KVM, and other modern hypervisors / virtualization platforms.

Impact

Specifically a flaw with how QEMU’s IDE subsystem handles buffer access while processing certain ATAPI commands, exploitation can allow for the execution of arbitrary code on the host with the privileges of the host’s QEMU process corresponding to the guest.

Summary

  • Made public on July 27, 2015
  • This flaw exploits QEMU, a generic and open source machine emulator.
  • Allows for an attacker to execute arbitrary code outside of their own virtual machine.

Resolution

A patch is available, and Liquid Web’s Heroic Support has proactively scheduled a reboot to patch all affected servers.

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Information on CVE-2015-3456 QEMU Vulnerability (VENOM)

Overview

VENOM, or Virtualized Environment Neglected Operations Manipulation, was made public on May 13, 2015. The vulnerability is in QEMU, a generic and open source machine emulator and virtualizer that is utilized by Xen, KVM, and other modern hypervisors / virtualization platforms.

Impact

Specifically a flaw with how QEMU handles out-of-bounds memory access, exploitation can cause the entire hypervisor to crash and may allow an attacker to access other virtual machines outside of their own.

Summary
  • Made public on May 13, 2015
  • This flaw exploits QEMU, a generic and open source machine emulator.
  • Allows for an attacker to access other virtual machines outside of their own.
Resolution

A patch is available, and Liquid Web’s Heroic Support has proactively scheduled a reboot to patch all affected servers.

Continue reading “Information on CVE-2015-3456 QEMU Vulnerability (VENOM)”

How to Prevent Being Hacked by the Cross-site Scripting Vulnerability in WP Super Cache

The popular WordPress plugin WP Super Cache has been found to have a cross-site scripting (XSS) vulnerability in versions prior to 1.4.4. On sites with outdated versions, it is possible for an attacker to take complete control of the WordPress site. Please note: this vulnerability only affects users which have installed WP Super Cache. However, if you are unsure if you use the plugin or not you should still take precautions to protect your site.

Thankfully, this is vulnerability is simple to address; version 1.4.4, available now, contains a patch.

This tutorial is very similar to our tutorial on updating any WordPress plugin: How To Update a WordPress Plugin

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How to Update a WordPress Plugin

Step 1: Login to WordPress as Administrator

Hopefully, you’re already well-versed in logging into your WordPress site as an administrator!

Step 2: Access Updates

If there is an update for a plugin or a theme, then you’ll likely have a number in the top bar and next to Updates as shown below (the number 5). Click on Updates!

How To Update a WordPress Plugin - 01

Step 3: Select All the Plugins

Check the box for Select All:

How To Update a WordPress Plugin - 02

Step 4: Update the Plugins

Click on Update Plugins:

How To Update a WordPress Plugin

And at the end of the update process you should receive something similar to, All updates have been completed.

How To Update a WordPress Plugin

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Information on CVE-2014-6271 and CVE-2014-7169 Bash Vulnerabilities (Shell Shock)

On September 24th, a vulnerability was reported in the GNU Bourne-Again-Shell (BASh, or Bash), specifically a flaw with how Bash processes values of environment variables, that allows remote code execution of varying types in many common configurations. The overall risk is severe due to bash being configured for use, by default, on most Linux servers.

While Liquid Web immediately began working to proactively patch this vulnerability, some servers may remain vulnerable depending on their update settings or other unforeseen intervening factors. Thus, we’ve provided the instruction below.

To Summarize:

  • This flaw exploits Bash, a Unix command-line shell run by default on most Linux servers.
  • Allows for remote code execution, and many types of command-line based attacks.
  • A patch is available, and your server can be easily updated.
  • We have tutorials on How to Update Bash on Red Hat and CentOS and How to Update Bash on Debian and Ubuntu.
  • Test the vulnerability of your server with the information below.

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