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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1answer
90 views

Block OS fingerprinting without using iptables?

I have a Linux machine connected to a Windows 98 PC on port 104. Now I want to block the OS fingerprinting using nmap for the windows 98 PC. I tried using iptables (blocking that particular port) but ...
-1
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1answer
140 views

Why is Linux considered more secure than Windows? [closed]

Why is Linux considered more secure than Windows? Is there some sort of recent security report that proves it? I have come to believe that Linux has been safer so far, but now as we have Windows 10, ...
0
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2answers
64 views

Mac OS X vulnerabilities and not having the need for an antivirus?

I have just read news about Mac OS X vulnerabilities and wondered why would people say that you don't need an antivirus if you are using a Mac? There are vulnerabilities in other operating systems ...
1
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1answer
19 views

Are there any mechanisms to verify the correctness of a burned disc?

I was recently recommended a specific smartcard over on HardwareRecs.SE. As part of this, the answerer (our ursine overlord) stated that the cards in question don't offer a means to securely backup ...
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6answers
184 views

Relative merits and risks of encryption and OS security [closed]

There are many aspects to computer security and many threats to address: poisoned DNS, worms, trojans, viruses, rootkits, firmware malware, etc. One of the biggest software vulnerabilities is buffer ...
3
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2answers
155 views

What information could be identified about a Virtual Machine which routed traffic via a VPN?

Background: I have a Virtual Machine which is running all it's traffic through a VPN (from within the Virtual Machine) so to obfuscate all web traffic. This Virtual Machine is running from within an ...
0
votes
4answers
126 views

Isolated safe anonymous OS

I wonder about a setup where I can have a primary OS on my Laptop, but keep a second OS that is safe, anonymous, persistent and isolated (for sensivite data that may communicate with the outside ...
5
votes
2answers
69 views

How to secure shared user on build server?

We have a CI server which is installed as the builduser and all tasks are executed as that respective user at the OS level. We have many teams sharing the build server which means the build user and ...
12
votes
4answers
7k views

OpenBSD vs. NetBSD security

If I search for the two words: OpenBSD and NetBSD on http://www.exploit-db.com/ then I get 17 hits regarding security bugs on OpenBSD, and 8 hits regarding security bugs on NetBSD. So what are the ...
32
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10answers
6k views

Vulnerable OS's?

Which vulnerable OS's like for example DVL would you recommend for someone to use for the purpose of pentest/exploitation learning?
4
votes
1answer
307 views

Is there a GNU/Linux or BSD distribution dedicated to air-gapped computer?

I am currently in the process of setting up an air-gapped computer which will be dedicated to managing cryptographic key (including: generation of GPG key/subkey, management of a small CA, generation ...
1
vote
1answer
60 views

Is there a way to create separate environments on your computer with no way of detection?

I would like to know if there is a way to create two different systems/environments on your PC (Windows OS) that you will enter each by different username and password. When someone enters your ...
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2answers
24 views

Privilege escalation if the privileged ID is known

If I know the ID of a group, whose privilege is higher than mine, is it possible for me to execute programs using that group ID? If so, how do I do it? If not, why not? Will appreciate all answers.
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1answer
2k views

Download an OS image via torrent [duplicate]

If you take the Ubuntu alternative download page for example, there, you have the possibility to download the OS also via torrent. Being a peer to peer where files are stored on anyone's machine got ...
1
vote
3answers
83 views

Since when can't any program get MS-DOS and MS-Windows admin rights?

I'm certain that I read that in the 80s with 8-bit Intel processorn, any DOS program that was run with MS-DOS was run in administrative mode and could do anything that any C program could do. Now I'm ...
3
votes
1answer
56 views

OS fingerprinting [closed]

I have been asked to write a small tool that detects the running OS on a victim device. The tool should be able to fingerprint Linux versus Android versus iOS. Extra credit for version info. It needs ...
0
votes
2answers
77 views

Access to system32 [closed]

Is there a way anyone can access the system32 folder on Windows without being logged in? If so, how would he do that and how to prevent it.
1
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3answers
54 views

Securing online SQL database and server [closed]

I am trying to build a big project but lack the knowledge of security of servers and SQL. So, please help me by telling what necessary steps should i take. Block all remote access :- I have heard ...
0
votes
1answer
55 views

Do I need to change my host OS to something like Tails if I already have Tails running in a VM if I want to be protected on the interenet?

First let me say sorry if I sound like a script kitty, because I am. Now on to my question. So I want to be protected on the internet when I go on the deep web, do banking etc. I use Tails to protect ...
5
votes
2answers
71 views

How does a firewall software intercept network communication?

I have a basic idea of what a software-based packet filter does, and I'm not sure if it's entirely accurate. Basically, a packet filter is a loadable kernel module that is inserted into the network ...
3
votes
2answers
1k views

Is a monolithic kernel more secure than a microkernel for a small OS?

Upon building a kernel for a small CLI system what option is the best one? I don't know much about what microkernels can do so bear with me if I'm being ignorant: In one instance, there are ...
5
votes
2answers
169 views

Wiping a computer of personal information while keeping the operating system intact

I have a unique situation but will try form this as a generally applicable Q&A: I must leave my Operating System intact, but completely wipe my information from the computer. How can I do this? ...
7
votes
1answer
504 views

OSX HomeBrew Security Risks

I've been trying to harden my OSX 10.11 computer and one of the guides suggested installing Homebrew to get updates to things such as OpenSSL. While updates are great, it seems like Apple should be ...
3
votes
1answer
451 views

What do Msgsrvr and Scientia-ssdb do?

I'm having a task in a computer security class in school where I'm supposed to scan a host for open ports in order to find out what services are being run there. I have found out (among other things) ...
2
votes
0answers
70 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 ...
28
votes
1answer
7k views

iOS Encryption Details

Following on from this question, what resources are available relating to the technical specifics of how apple implement encryption on their iOS 4.x series devices? The Apple marketing material here, ...
3
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1answer
69 views

Operating system encryption of a Virtual Machine

I am a MacBook Pro user but sometimes I need to manage very sensitive data on Windows Seven. I am running Windows Seven on a virtual machine using Parallels Desktop v10.2.1. This software already has ...
49
votes
4answers
7k views

Old OS memory space protection - was it really that bad?

In his book Security Engineering, Anderson really focuses on how in the 90s and early 2000s programs would need to access memory that wasn't their own, and programmers programmed with the assumption ...
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votes
1answer
169 views

Can someone bruteforce my OSX? (Macbook)

Is it possible for someone to bruteforce or perform a dictionary attack on a Macbook? It's very easy to bypass security of a Windows box (Password Protection) , what is the difficulty level of ...
12
votes
4answers
1k views

When using multiple operating systems, can they affect each other?

Let's say I have two different OS on my PC, Windows 10 and Linux. It is well-known that Windows collects a significant amount of information and sends it to Microsoft's servers, but I wonder if it ...
0
votes
1answer
31 views

Who is the Mandatory Access Control Administrator

Would a mandatory access control implementation administered by a 'normal' user be discretionary since the user could change permissions as he sees fit? And if so, wouldn't root as a MAC admin, being ...
0
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0answers
58 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 ...
2
votes
3answers
1k views

Security in Windows 7 vs Ubuntu

I have two semi-related questions about the security-related reasons I hear for switching to Ubuntu over Windows 7 (or from other Windows OSs to other Linux distributions). Someone people say that ...
11
votes
8answers
2k views

Where to download OpenBSD release ISO's over HTTPS?

OpenBSD claims to be highly secure. So why doesn't it allow downloading the release iso's over HTTPS? Or I'm missing something? Can someone please explain this to me?
7
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3answers
1k views

How to hack a Win95 machine?

While playing with old operating systems, I came across that there are no remote code execution exploits available for Win95 machines, running just file share (no IIS or anything else). Win95 neither ...
1
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2answers
53 views

Does OpenBSD's security protect against identical vulns in other OSs?

I have been reading about OpenBSD and its more secure design. I was wondering therefore about the difference this makes to applications which can run on any number of OS. Lets take the example of a ...
-2
votes
2answers
557 views

What is the most “out-of-the-box” secure OS for a home user? [closed]

This question will encompass several topics and may also include user opinion. Here is the question, and how I want you to qualify it: Question: What is the most "out-of-the-box" secure OS for a ...
56
votes
9answers
10k views

Why don't OS's make keystrokes available to only the current app?

Seems like a relatively obvious way to prevent (software) keylogging would be to force only the current (in-focus) app to be able to receive keystrokes. There could be a way to make explicit ...
1
vote
1answer
95 views

Where does the list of trusted content authorities come from when using a web browser?

I was asked "how do browsers know whether or not to trust the certificate from the server it's connecting to" and thought it was a pretty good question. After doing some googling I found two answers: ...
2
votes
1answer
265 views

Security research on Operating system security measures, where to start?

I am researching on operating system security, And I don't know where to look for more information on this. I could find the following sources, but I need more guidance. Sources: Microkernel ...
9
votes
6answers
1k views

What is preventing the widespread common use of MAC-type systems?

Overall question What is preventing the uptake of MAC systems such as SELinux/AppArmor in corporate and desktop computing environments? Why don't you think it isn't already widespread? I do not ...
2
votes
0answers
55 views

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 ...
8
votes
4answers
202 views

Does it matter which platform a file is scanned on for malware?

Different operating systems use different file types and file systems. Does it make a difference to a virus scan which system it is being run on and what type of malware it's looking for? I ask ...
2
votes
2answers
61 views

Is it fundamentally possible to develop a (provenly) transparent computing system?

I recently asked a question regarding security obstacles of online voting via a web service, and one of the primary obstacles to doing this is the difficulty of proving that the program processing ...
12
votes
3answers
4k views

Can you extract memory contents from a hibernated Windows machine?

In a recent discussion about hardware hacks, attacks surrounding Windows hibernate popped up. I am not entirely convinced that it would be viable to get stuff out of the memory saved to disk. When ...
10
votes
1answer
143 views

Are there any architectures currently out there that use hardware-enforced process isolation? What would it take to add that to x86?

First-time asker/commenter, long-time reader. As someone who's currently doing a lot of thinking & writing about measures that might foundationally improve computer security (ie., involving not ...
2
votes
1answer
127 views

OS login password: How does it work?

I am making an application to create a password for a user. I am a bit baffled over how it all works though. Namely I want to be sure that my application will store the correct hash so the user can ...
5
votes
3answers
5k views

Is Linux spying on its users? [closed]

If you install some kind of Linux distributions on your computer, is their a possibility that their owners may spy on you? For example, can Ubuntu, Kali or Arch linux send data to its owners on what ...
35
votes
7answers
3k views

Is it safe to trust a Docker container?

When it comes to Docker, it is very convenient to use a third party container that already exist to do what we want. The problem is that those containers can be very complicated and have a large ...
3
votes
2answers
124 views

Is it possible to browse/access the files on a computer's hard drive by booting from an OS installed in a flash drive?

I have installed Tails in an USB flashdrive and then booted my macbook with it. I noticed that Tails was capable of seeing my macbook's hard drive. Out of curiosity I tried to browse it. ...