Virtualization is the creation of a virtual (rather than actual) version of something, such as an operating system, a server, a storage device or network resources.

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Are virtualized environments vulnerable to the Row Hammer attack?

Row Hammer is an exploit which relies on RAM defects to get unrestricted access to the RAM content, allowing to read/write otherwise protected memory and to get higher privileges on the system. To ...
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When testing out security vulnerabilities on sites such as OWASP Projects, should we be in a secured/protected environment?

I was curious if there is any need to secure/protect ourselves when doing projects on sites like OWASP to learn about vulnerabilities or "Wargames/Challenges" such as what's posted in these links How ...
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How to handle password storage for my project?

We have NFC cards to keep track of presence, students scan their card to a terminal at the beginning of every lesson, we want to extend the cards usage to filter out who can access the Raspberry Pi's ...
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100 views

OpenVPN and running other services on same server

What security implications should I know about/look for when running OpenVPN on the same server as my network cloud controller and apt-cache-ng? I plan on using the same server to run apt-cacher-ng ...
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332 views

Virtualization / Cloud-Stack fingerprinting from running VM

How can the host environment (not just the OS) be identified from a running guest VM. To determine what the underlying host and virtualization stacks being used actually are. I.e. whether there's a ...
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Enabling virutalization, addressing the bluepill risk?

Background to this question is the ambivalence I assume with virtualization. Also to start directly with clarity: the term bluepill should here be a placeholder to denote "malware that uses ...
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Firewall in virtual machine

I'm putting my server to use as a file server and a firewall. I'm looking at KVM or Xen VM setup where file server and firewall get their own VMs and host is just supplying the hardware (so Xen way, I ...
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What are the steps to securing encryption keys/databases on an unsecured DAAS provider?

Most Desktop As A Service providers store their virtual hard drives and the VMs RAM in a way that allows them to access their contents. Choosing a provider who offers a 'no-knowledge of server' ...
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What's going on with connections to/from bluecoat?

I'm trying to track down a cause on an Internal Server Failure for an Apache server. The IP address changed recently, so I thought the crash might be related. A quick search of the old IP: $ sudo ...
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Can linux cgroups and namespaces assist hiding malware?

Reading about sandboxing/security possibilities I was looking a bit into cgroups and namespaces and asked myself: How do I know that my linux root account is indeed the real root account and not ...
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156 views

Are Hyper-V Memory Snapshots secure/encrypted?

When dealing with encryption tools (TrueCrypt, Bitlocker and any successors) the passwords are always somewhere in memory. Therefore when there are memory dumps on a hard disk, for example in the ...
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How to manage security for multiple PC and VM?

I have a firewall VM which creates I have used to setup subnet for different purposes. For example: (fake ips, of course) 1.1.2.1/24 DMZ 1.1.3.1/24 Internal 1.1.5.1/24 security/logging I use ...
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VM Introspection on Public IaaS clouds

I came across this Security SE post and a few papers on VM Introspection [1] [2] [3] What prevents cloud providers like AWS from using techniques like these to observe EC2 instance activity? If they ...
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Sandboxing IE on metro interface

I hold a tablet with Windows 8.1. When I'm on the desktop interface I do use Sandboxie for normal internet usage to prevent having Windows infected. I wonder if there is a way to do the same with the ...
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41 views

How to get a completely isolated virtual time using Xen?

Referring to the following quote https://www.kernel.org/doc/Documentation/virtual/kvm/timekeeping.txt 4.8) Covert channels and leaks In addition to the above problems, time information will ...
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70 views

Virtual Machine Introspection for VirtualBox

Is possible use Virtual Machine Introspection (VMI) for monitoring system calls and internal system operations in Oracle VirtualBox machine (if I use Linux as quest system) in this time? I have read ...
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95 views

VPN Server Inside VPN client on Router

This is a different context of an already asked question: In a few words: Sub-VPN or VPN SubNetwork... VPNsception? So I am using DD-WRT flashed router which connects as a client to VPN server "...
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55 views

Is it possible to lock guest VMs (or processes) to sticks of physical RAM to prevent row hammer attacks?

I was wondering if it is possible through some means to isolate processes (or preferably guest VMs) to physical sticks of RAM. This would be to prevent row hammer like attacks from using physical ...