Questions tagged [operating-systems]

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 like to use one of the [windows], [linux] or [macos] tags.

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Penetration-resistance of a HaLVM unikernel

A HaLVM unikernel is a Haskell program compiled with a modified version of the Glasgow Haskell Compiler to produce a standalone Xen kernel, which will boot on any Xen PV machine instance. A HaLVM ...
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1answer
112 views

How to enforce on the OS level to recognise only certain keyboards

I give employees AES wireless keyboards. I would like to enforce the OS to only recognise the keyboard we supply. Is that possible? Assuming my employees OS are Windows 10, Ubuntu, Mac OSX. How could ...
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0answers
157 views

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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0answers
78 views

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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0answers
482 views

How is hardware based chain of trust implemented in practice for secure boot?

To do secure boot we need an immutable public key baked into the ROM. This key is used to sign the boot loader or the key used to sign the boot loader. I have these questions - Which code does this ...
1
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1answer
286 views

Multiple Independent Levels of Security vs Multilevel security

I am looking for a way to isolate two different networks from each other. Suppose we have 2 different networks (public and private). I am looking for a way to connect to these two networks via a ...
1
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0answers
132 views

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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0answers
50 views

Using nmap to detect realtime operating system

I would like to understand whether nmap can be used to detect the operating system type for realtime OS (Vxworks, threadx, free RTOS, etc.). Has anyone done similar work before? Or if you have any ...
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0answers
61 views

Learning how to audit a linux system, what does it mean to configure password & system auth?

I'm currently using Linux Red Hat OS, and I need to configure it accordingly to /etc/pam.d/password-auth and /etc/pam.d/system-auth under CIS Red Hat Enterprise Linux 8 Benchmark v1.0.0-1. What page ...
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0answers
44 views

How can third-party VPN applications tunnel all traffic of all processes on sandboxed operating systems?

How can (third-party) VPN applications tunnel all communication of all processes on sandboxed operating systems (such as OSX, etc)? Can they access the traffic of other apps and redirect them? Why is ...
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1answer
158 views

how may I see if a .iso file is original (to avoid security troubles)?

I bought a license key for Windows Enterprise on eBay. The seller sent me a .iso file (Windows Enterprise cannot be downloaded from the Microsoft website directly). He told me he sent a version of ...
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1answer
113 views

Is a live-system vulnerable?

For example using a live-system (that should run just in RAM) like some linux distributions. I don't know which password restriction are used on some distributions, not sure I knew that some exploits ...