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.

Filter by
Sorted by
Tagged with
-1
votes
0answers
25 views

Is possible to Access to read/write the ipad/ios memory? [closed]

There is a method to read the memory of an ipad ? What i mean is not to read about the data stored in the ipad but I'll need to read what data ( like os , the file system and bootloader ) are inside ...
2
votes
1answer
81 views

Access to foreign memory address

Modern operating systems like Windows 10 isolate memory addresses for processes so how is it possible that Cheat Engine can get these addressed and change their values? At this forum it has already ...
0
votes
0answers
35 views

How do I use my Android smartphone as a firewall for my PC? [closed]

Is there such application for my smartphone than can monitor and block the internet traffic of my PC? Or should I use something like a WireShark eqivalent to intercept the PC's traffic? Reason behind ...
0
votes
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 ...
0
votes
6answers
270 views

Switching operating systems for security

An operating system is a very important vector in an attack. If someone wants to hack your personal system he needs to know the operating system to know which exploits to use for example. But if you ...
50
votes
7answers
13k views

Can you hide your OS from programs? Can you trick a program into thinking you are on a different OS?

Is there a way or program to make another program think I am using a different system? For example, let's say currently I am on Windows 7 32-bit and I want the program to detect Windows 10 64-bit or ...
18
votes
4answers
10k views

How do I hide the OS I am using from internet sites?

I am currently trying to mask the OS system I am using from the websites I visit. I'm doing this for an added layer of security. How would I go about hiding the OS from websites?
1
vote
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 ...
3
votes
3answers
151 views

Should operating system passwords be complex if full disk encryption is used that has a complex passphrase?

If a device uses full disk encryption such as LUKS, BitLocker (with a pin), Veracrypt and others and boots using a complex password, what is the need for complex passwords to log into the operating ...
156
votes
14answers
25k views

Why is the OS obfuscation defense against “It's a Unix system!” not widely implemented?

The Jurassic Park scene referenced in the title is infamous for how ludicrous it sounds to those who are tech literate. But it also illustrates what seems to me to be a glaringly huge hole in web ...
9
votes
3answers
23k views

Where can I download vulnerable Windows OS images to practice penetration testing?

My objective is to learn and practice all the vulnerabilities and their exploitation on vulnerable OS.
5
votes
8answers
284 views

Is it useful to determine the name of the server software while doing a penetration test?

Getting the name of the server software through netcat or curl or any other method, is really useful? I mean, OS fingerprinting is useful in order to tailor an attack. For example with regard to OS ...
2
votes
3answers
212 views

Would services or whole operating systems written in pure Python/Java be safer?

Many Windows and Linux services are written in C and/or C++. Due to that fact, they can be exploited in several ways due to the lack of memory security (buffer overflow, etc.). Are services written ...
1
vote
1answer
137 views

Is an OS more vulnerable while it is being updated?

Are there any additional attack vectors that apply when an OS is being updated? For example, would the services that are being updated be unstable? An OS is generally more secure after being updated, ...
6
votes
1answer
4k views

Windows mandatory access control: How to remove “mandatory level” label from the file?

1) How to remove "mandatory level" label from the file? I have two files, for the first one icacls returns Mandatory Label\Medium Mandatory Level:(NW) for the second icacls doesn't return anything ...
2
votes
2answers
175 views

FarCry 1 Server Security Risks?

Some friends and I want to play FarCry version 1.40 on PC over the internet on our own private server but we have some security concerns. Since the game was released 15 years ago and we'll be running ...
451
votes
13answers
94k views

Are passwords stored in memory safe?

I just realized that, in any language, when you save a password in a variable, it is stored as plain text in the memory. I think the OS does its job and forbids processes from accessing each other's ...
1
vote
1answer
98 views

Is there any method or tool other than nmap for the detection of an OS?

I wanted to know if there was any other way to detect the OS of a network (other than nmap) since nmap doesn't detect most versions of Windows 10 at all and identifies them as a different OS ...
26
votes
5answers
14k views

OS with encrypted RAM?

Are there any applications, JIT frameworks or operating systems that focus on encrypted virtual memory, or perhaps virtual machines that do something similar? I know there are processors (albeit old, ...
0
votes
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 ...
2
votes
1answer
483 views

Is there a multi-layered DoS protection which can be tightly integrated with cloud hosting services?

I know that one can deny services (DoS) in any of the 7 layers of the OSI model and that in principle, a denial can be done by a single entity (human or machine) or from 2 or more such entities ("...
-1
votes
2answers
130 views

If my computer system is on, but none of my network connections are active, can someone work on hacking into my OS?

I thought I read that if my network connections, both wifi/ethernet, are NOT on, that if someone wanted to try and work on hacking my OS, that they would have to wait until the network connection is ...
4
votes
3answers
2k views

How could one say that older operating systems are more vulnerable?

Experiment conducted by me in Windows using Virtual Machine: I have collected all rogue security software that target a range of Windows versions and several latest malware (no older than a month) ...
0
votes
1answer
77 views

Blocking mimikatz on the OS level?

I want to know under which case would Mimikatz still run despite disabling WDigest? Whether wdigest is set to 1 or 0, mimikatz still worked. (tested on Windows 7, 8, 2012) Is there a better way to ...
4
votes
2answers
133 views

Is there such thing as an OS “internal firewall”

I was wondering if there is such thing as an OS "internal firewall". If it exists, it must be under a different name. I am looking for a way to control which applications can talk to which other ...
15
votes
5answers
26k views

Monitoring system calls (in a reliable and secure way)

It there a reliable method of “monitoring” system calls under Linux? There is strace for example to monitor system calls and signals. Is there a way for a process to dodge out of strace? If yes, is ...
4
votes
2answers
208 views

How can a VM handle a compromised host?

How can I protect a VM build e.g. with LinuxKit, if my host system is compromised? Are there methods available or am I always at the host's mercy? And is it possible to isolate what's going on inside ...
-1
votes
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 ...
2
votes
1answer
521 views

How to do forensis MBR hex dump?

I take OS first 512 hexdump using dd command. what kind of information extract using that and what are the tools or command(linux) can be used for analysis ? I take copy bytes dump using my Ubuntu ...
2
votes
0answers
95 views

Computer that can't upgrade beyond Windows 1803 - safe to use until when? [closed]

I have an old computer that can't (at least according to Windows Update) upgrade beyond Windows 1803. (Probably due to the manufacturer not releasing updates to drivers.) Until when will it be safe to ...
0
votes
1answer
125 views

How can vulnerability researchers find flaws in OSes / Embedded Systems?

Operating Systems and Embedded Systems usually don't come with source code or binaries that one can review. How can a vulnerability researcher look for flaws in a system (Architecture, Protocols, etc....
0
votes
1answer
405 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 ...
1
vote
2answers
160 views

Can a rootkit write to a virtual memory of a kernel process and rewrite a instruction to jump into his own malicious code inside that process?

So lets say we have a rootkit on our system can this rootkit write something inside a kernel process? for example in windows, can a rootkit write to ntoskrnl process, changing some functions and ...
34
votes
2answers
8k views

Why is there a need to modify system call tables in Linux?

I have been learning about rootkits recently and have noticed this hooking techniques that kernel-land rootkits use in order perform malicious actions. Where a typical hooking operation would be to ...
-2
votes
1answer
11k views

How can I check if someone tampered with the CCTV footage or system?

Recently I was staying in a hotel and I had some very important belongings stolen there in the hotel which is definite. The problem is that no one entered my room after I left the room (2 times for ...
-1
votes
1answer
111 views

Can a rootkit hide its data in slack space of pages in memory instead of disk?

So I'm asking about Linux or Windows type of rootkit/malware is this possible? can a rootkit use the slack space in the pages of the memory instead of disk to hide data? if so, has this ever been ...
1
vote
2answers
147 views

Security measures to take upon acquiring a new laptop?

I'm planning on buying a regular HP laptop. However, I'm still a novice when it comes to information security. I'm planning on using this laptop to SOLELY login to my bank accounts and NO OTHER ...
1
vote
3answers
683 views

If x86 architecture has overflow flag in the CPU, then why can't we use it to detect integer overflows in C binaries? [closed]

I'm talking about the overflow flag that is used in some architectures like x86: https://en.wikipedia.org/wiki/Overflow_flag why aren't operating systems using this overflow flag to stop integer ...
7
votes
1answer
583 views

Do any non-GNU/Linux display managers provide the same isolation as Wayland?

In discussions around the ongoing transition from X.org to Wayland, I regularly come across comments along the lines of "Linux security is not there yet". This refers to Wayland's promise of better (...
66
votes
4answers
9k views

Is an up-to-date browser secure on an out-of-date OS?

Windows 7 support will end on January 14, 2020. Assuming that after that day I still use an updated browser, is it true that I'm still safe? Can it "patch" the OS-based security holes? Minor question:...
7
votes
2answers
5k views

How SS7 attack first enter into SS7 network?

I've read the following article about SS7 attack: https://berlin.ccc.de/~tobias/31c3-ss7-locate-track-manipulate.pdf I have some questions about this kind of attack: Is SS7 attack can be done ...
20
votes
7answers
6k views

How can I protect my computer from my potentially malicious colleagues?

So, I work in this small company (10 people) where we do stuff in programming, for various platforms. I started recently working there (2 months) right after I graduated. My work is not exactly ...
95
votes
9answers
24k views

Can a virus destroy the BIOS of a modern computer?

In the late 1990s, a computer virus known as CIH began infecting some computers. Its payload, when triggered, overwrote system information and destroyed the computer's BIOS, essentially bricking ...
-1
votes
2answers
118 views

How can I ensure that I can trust to OS?

How can I ensure that some OS can be trusted? I'm not speaking about possible security problems which can happen everywhere but about something like a backdoor left by a developer. Can such a thing ...
0
votes
3answers
216 views

Can you detect that new files were added to a hard drive that was removed and replaced?

The internal HDD was removed from my laptop (with Windows 7) and connected to another machine to tamper with. Some new files were also created/copied by the mischief maker. After the tampering was ...
1
vote
2answers
303 views

Are the CPU protection rings meant to protect against malicious programs or against unintentional programming mistakes?

I am trying to understand what is the purpose of the CPU protection rings (specifically user mode and kernel mode). I don't think that the CPU protection rings are meant to protect against malicious ...
1
vote
2answers
252 views

Can a detached hard disk reveal the system information of machine from which the hard disk is detached?

Can an internal hard disk (on which Ubuntu or any other OS is installed) that I detached from the PC or laptop (Keeping the OS as it is) and connected to some other PC or machine reveal the info of ...
5
votes
1answer
419 views

How can I find a web application's document root using a path traversal vulnerability?

I am performing a penetration testing on an application hosted on an Ubuntu environment. So using a path traversal vulnerability, I can download any file. The API web application runs as root (...
6
votes
2answers
2k views

Ring 1 and Ring 2 Memory Protection Architecture

I have heard that Ring 1 and Ring 2 memory protections are basically no-longer used within modern systems. However, when I checked into things, all I found was that these rings are somehow associated ...
0
votes
1answer
92 views

What are the security implications if systemd is not restarted after it has been updated?

My understanding is that systemd is the parent process for all other processes running on Linux. If systemd has been updated on production devices such as servers and the service is not restarted, ...

1
2 3 4 5
8