The operating system is the software component that provides abstraction of physical hardware, and provides a generalized model for application software to execute without the need for specific hardware knowledge. Questions on the topic of operating system security should use this tag; you may also ...

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userWorkstations attribute in AD preventing users from logging into WebApp

For some of our users in AD, we have set userWorkstations attribute to restrict access to other machines. But this is preventing those users from logging into WebApplications (around 50+) protected ...
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What protections are put in place to prevent rootkits from getting ring 0 access?

I've been learning about What is a rootkit? As well as rootkit building and general system architecture. I have read that there are "User mode" rootkits that run in ring 3. But these aren't the ...
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Creating New Acc in Mac Mail 1st Connect to Server not SSL is uname & pw tx secure?

It appears that whenever you set up a new mail account on Mac Mail on OS X (or iPhone, iPad etc), that as soon as you enter the server and the mail account user name and password, Mac Apple-Mail tries ...
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Pentesting an ATM OS upgraded from Windows XP to Windows 7

How to approach penetration testing of a ATM OS that was upgraded from Windows XP to Windows 7? From what I gather, the testing flow should be as follows: Architectural Review Pentesting OS and ...
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Multiple Independent level of security vs Multi-level security

I am looking for a way to isolate two different networks from each other. Suppose we have 2 different network (public and private). I am looking for a way to connect to these two network via single ...
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DLL preloading attack - are IAT libraries affected too?

I'm about to distribute a dll library (there's also a linux version) to my users but I'm afraid of dll preloading attacks (i.e. someone substituting its malicious dll to get called by mine and gain ...
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How to encrypt a USB to be used with MAC & Win

I would like to find out if it is possible to encrypt a USB flash drive (or only password protection) which could work with dual OS ( Mac & Windows ). Is there a free software that i could use to ...
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Minimalistic operating system for enhancing ssh security?

As we know, although the SSH protocol is sound in theory, it can be compromised when the implementation is faulty or the underlying operating system is compromised in other ways that indirectly ...
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Can the instruction set be targeted directly?

Can malware directly manipulate the instruction set or is it restricted to the functions/services of the os/kernel?
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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 ...