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0
votes
1answer
70 views

reading/downloading big files in metasploit module [closed]

I am writing a post exploitation module that supports meterpreter sessions. For my module to work, I need to read/download some files from the victim machine that may be small or bigger. I am having ...
2
votes
2answers
84 views

How risky is having sensitive files on webroot?

I understand that having anything sensitive under webroot is not smart; someone may be able to access it via url. However, I do not have a choice with my web host (iPage) as they limit my server space ...
0
votes
2answers
84 views

How to transfer securely a file between servers?

Let's say I have two Linux servers. One containing a desktop app database (running on a local network) and a webserver. I want to automatically transfer each hour a database file (with a size of a ...
0
votes
1answer
48 views

Can benign software modify Widnows DLL files?

On Windows (XP, 7, 8, NT ...): can .dll files be modified (in any manner) by benign programs/software already installed/running on the computer ?
0
votes
2answers
134 views

Why do file storage sites have a long unique id for their download links?

I'm creating a file storage site and what I would do is just have the download links format as: https://www.domain.com/[id]/[file name] //id would just be 1, 2, 3 etc. Dropbox and many others have ...
0
votes
1answer
208 views

Force download files protected with auth headers

By several REST clients the credentials are sent with every request through custom HTTP authorization headers to the REST service. Is there a way to force file download in the browser when accessing ...
2
votes
1answer
228 views

One-Way Data Transfer Cable

Is there a cable that physically only supports data flow in one direction (out)? The idea here is to put this on a system that can only export data so that there is very minimal risk of the ...
0
votes
1answer
81 views

Is a properly configured server secure against unauthorized data access?

Take for example a game. Typically, when you buy or download a game that can be played offline, all of the data required to run the game is shipped with the executable. In order to protect these ...
-3
votes
1answer
96 views

Need to prove someone sent an email, not me [closed]

Received: by 10.182.241.38 with HTTP; Sat, 15 Mar 2014 14:09:36 -0700 (PDT) In-Reply-To: <294B46790F860A4B9790B42606DFA3E4E4E5AE@MAHEXMB02.thrivehosted.local> References: ...
2
votes
3answers
290 views

Can I use 777 file permissions inside server virtualisation (that only I have access to) without worry?

For this question, please assume I have followed every possible security measure to secure my Linux server. Only I have access to the web server via one open SSH port. If there are security issues ...
3
votes
2answers
118 views

How can I ensure that Dropbox is using only its folder?

I'm using several cloude storage services, like Dropbox. Each have windows app for its synchronization, and this app actually can read anything from my disc, not just files from its 'synchronized' ...
2
votes
2answers
164 views

Access control of Linux and Bell LaPadula Model

I know that access control is a very important think when we want to protect our files and in security in general. Does anyone know what access control system is used by linux? In addition I just ...
1
vote
1answer
305 views

Installing Joomla with nobody:nobody user/group (CentOS/cPanel)

If you are installing Joomla via cPanel's File Manager to your mywebsite.com (user mywebsite) account, you will upload the package to your server and extract the archive. All files will have the user ...
0
votes
2answers
70 views

Restricting locations for unzipping a zip file

I hope that I have found the correct place to ask my question regarding unzipping files. I would like to see if there is a way to restrict the locations available to the user to unzip a password ...
16
votes
6answers
5k views

How do I prevent copying of my PDF files?

One time while I was printing my documents at a copy center, I saw they dragged-and-dropped my PDFs from my flash drive to their desktop. How do I protect my files without using password? Is there a ...
1
vote
1answer
370 views

Limit BitTorrent Sync connections to a specific network

Is it possible to limit BitTorrent Sync connections to a a specific network using the client software? Right now the closest I can come up with would be IP limitations imposed on each client using a ...
0
votes
1answer
191 views

Luhn algorithm applied to file access

I am in the following setup: given department ids, employee ids and file ids I want to check whether employee xy of department AB is allowed to access file f. E.g. department id = "012", employee id ...
-1
votes
1answer
99 views

Is my invitation based file access authorization scheme worthwhile?

I need to allow users to upload files with sensitive data to a server, then invite other authenticated users to access specific files. This is my proposed solution: Each user will have his own ...
8
votes
2answers
249 views

What's ownership concept for?

I fail to grasp the necessity of using concept of owner (ownership) and find clear explanation of its necessity. What cannot be done without concept of owner(ownership) in filesystem/database object ...
2
votes
1answer
175 views

zip file downloaded: is it enough to remove it to be secured?

I downloaded a zip file, with vb files inside. If by any chance, it contains a virus, or a source code to have access to my computer, what should I do? I removed the zip file and the folder extracted, ...
0
votes
1answer
345 views

Restrict file access in php.ini

Can anyone explain me the difference between include_path and open_basedir in PHP? My php.ini looks like this: include_path = ".:/usr/share/php:/usr/share/pear:/var/www" If for example I try using ...
1
vote
1answer
179 views

Disadvantages of a single administrator checking all file permissions

What would be the security disadvantages of a single administrator checking every file permission in a network of computers? Obviously this is a theoretical question. I'm thinking that the fact that ...
-1
votes
1answer
3k views

Incorrect file permissions for LAMP [closed]

I have installed Apache 2.4.6 on my server and have the following virtual host config: <VirtualHost *:80> ServerAdmin webmaster@localhost ServerName foobar1.com DocumentRoot ...
-2
votes
1answer
73 views

Persisting data and programs by continually overwriting?

This is a sort of security-related thought experiment. In a (slightly odd) conversation I recently had, we got to discussing ways that a file could be kept the same, even when malicious users attempt ...
2
votes
1answer
199 views

Preventing access to file for process running as root

I have a client with a legacy application running on RH 3 (=the latest version supported by app). There is a process that has to run as root (and not in a chroot environment). I need to prevent this ...
1
vote
1answer
79 views

Securing Downloadable Files on Website Per User

I have an ASP.NET website serving up private PDF documents. The PDFs are stored unencrypted on a share on the internal network. The user logs in and navigates to the download page. The web server ...
1
vote
2answers
57 views

Per-transfer authorization of file transfers on a per transaction basis

In my organization, users have the rights to transfer files to and from servers using SSH File Transfer protocol for a variety of reasons; e.g. application troubleshooting, BAU, etc. Although our ...
0
votes
2answers
39 views

Safely generate a non-log file within an application server

How does one go about safely write a temporary file to a location within an application server that is publicly accessible?
0
votes
3answers
2k views

Are file permissions set in Unix/Linux effective in Windows or Any other OS?

Consider some files and folder in Unix/Linux OS which are configured for only read access by root, if the hard drive stolen, and used in Windows Environment, are these permissions are still effective? ...
7
votes
3answers
1k views

Security tradeoffs of pathname-based MAC (e.g., TOMOYO, grsecurity, AppArmor, …)

I have been learning about MAC (Mandatory Access Control) systems in Linux. Often, but not always, these are tied to Linux Security Modules. Some systems I've looked at: SELinux, Tomoyo, AppArmor, ...
4
votes
2answers
4k views

How to restrict skype file transfer outside of LAN

We are mobile application development company. Due to security of Source Code and other file, we need to restrict Skype file transfer outside of LAN. How to restrict Skype file transfer outside of ...
0
votes
1answer
101 views

Credentials using AWS IAM

I have a server, which should provide temporary credentials to the client. The credentials will be transmitted using HTTPS. The client should be able to upload S3 files, as well as download them. The ...
3
votes
2answers
134 views

Local Network Data Sync and Access Log

We have some confidential data for our research. Currently, we use an encrypted hard drive for storing the data and any researcher using the data takes it off the drive. However, we do not have any ...
5
votes
3answers
229 views

Could browsers improve security of stored passwords by using setuid?

On Unix-esque systems, Mozilla Firefox stores a users' preferences, web history and stored passwords in a set of files that are readible and writeable by that particular user. This makes sense: when ...
4
votes
4answers
317 views

How to securely share files with other individuals?

I have a collection of files I would like to securely share with a small number of other people. The collection is mostly static; no more than one or two new files will be added per month (after the ...
3
votes
3answers
269 views

Why should every file have a user and a group?

I've been reading in most hardening guides for linux, that you should check for files and directories without valid user or valid group. What I can't find, is how this could be used for an attack, or ...
3
votes
1answer
2k views

Header opening a PDF file, can someone hack a website from there?

Can someone hack a website that uses this kind of header to open a pdf? <?php header("Content-type:application/pdf"); // It will be called downloaded.pdf ...
4
votes
2answers
759 views

Possible arbitrary file download vulnerability

I am auditing a possible vulnerable piece of ASP code on a Windows environment. The code is as follows: If InStr(strPath, "\Only\Download\From\Here\", CompareMethod.Text) = 0 Then Basicly it is ...
6
votes
4answers
379 views

Are there a standard method(s) for me to give someone else read-only access to my data?

Are there a standard method(s) for me to give someone else read-only access to my data? There are several situations where I may want to give a few people read-only access to some data, but I would ...
1
vote
1answer
335 views

Shellcode for higher file privileges

I'm learning exploits from the book Hacking: The Art of Exploitation. The shellcode below was written to enable higher privilege access to files. \x31\xc0\x31\xdb\x31\xc9\x99\xb0\xa4\xcd\x80 ...
1
vote
4answers
7k views

blocking direct access to files via url input while still allowing a script on server to access files

I am trying to accomplish the following and have been unsuccessful. I would appreciate any insight. Scenario: http://www.mydomain.com/filename.html is a webpage. On this webpage I am running a ...
3
votes
1answer
390 views

Can UNIX Domain Sockets be locked by user ID?

If I created a folder /tmp/me with permissions 700, and started a process under me that starts a listen socket under /tmp/me/socket. I currently assume that a connection to that socket originated ...
6
votes
1answer
117 views

What are concerns with storing passwords in a restricted public folder on exchange?

Is it safe to store data such as account log-in information (for vendor websites, not administrative accounts), settings policies, activation documentation, and operating system keys in a public ...
3
votes
2answers
1k views

How to protect from copying files?

Is possible to protect files from being copied if you are the administrator of a machine? I heard that this behaviour is possible: one software developer sells his software in such a way. He installs ...
1
vote
1answer
191 views

users avatar names based on Primary Key, is it safe?

We upload users avatar with their primary key name. avatars name are 1.jpg,2.jpg,3.jpg,... according to their primary key. We implemented this to omit avatar field from database, instead with use ...
2
votes
1answer
619 views

My MP3 file is blocked, but still playable?

My computer is telling me that my MP3 file is blocked: I have no problems playing the song, so I was wondering what exactly does it mean for my MP3 file to be blocked?
3
votes
1answer
955 views

Which Domain Administrator created file X on a Windows 2008 R2-based server?

Someone created a file (web.config) in a location that basically caused IIS to not work. Is there any way I can determine who created this file? The creator/owner says "Domain Administrators". ...
15
votes
1answer
2k views

Something is changing my hosts file without asking

First: I can't find any information on this phenomenon, not anywhere on the net. I don't know which application does it, but something in my Windows 7 Home Premium system (fully updated & legal) ...
10
votes
3answers
19k views

Monitoring file access on Windows

I need a way to monitor user file access on windows. What I need is: monitoring of user opening, modifying (don't need to know what the changes were, just that a file was modified), copying, pasting ...