The tag has no usage guidance.

learn more… | top users | synonyms

5
votes
2answers
97 views

The history of thumbnails (or just a previous thumbnail) is embedded in an image file?

I was surprised when I cropped an image on Windows Phone, saved it, sent it via e-mail to a PC, and then downloaded it - and the thumbnail in the download folder was the one of original, not cropped ...
0
votes
1answer
157 views

Protect files on webserver, allow only internal use

I have a website and it has an audio player to play music files. The music files are hosted in a public directory. Since they are there anyome can point there and use the files on their website. Is ...
1
vote
1answer
27 views

Should pypi subdirectories be accessible from web browser?

I am a security researcher and when I was fingerprinting one web application I found out that all the subdirectories of domain.com/pypi were accessible from the web browser. The main directory pypi ...
1
vote
0answers
21 views

File sharing solution with approval workflow [closed]

Is there any solution out anyone is aware of that does secure file sharing but with the facility of an approval workflow. A case being a person can upload a file to the secure file sharing solution ...
5
votes
2answers
750 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 ...
-2
votes
1answer
35 views

How to protect EXIF data against editing/deleting in jpeg file?

Is there any option to protect EXIF data against editing or provide password protection? I came accross the idea of creating executable file from image file, so that someone can view image the way is ...
3
votes
1answer
83 views

Can email services upload files from your computer without your permission/knowledge?

The company I work for is involved in security clearance work, and thus all company computers are monitored (files, screenshots, etc). I am routinely logged onto my company email service with my ...
0
votes
0answers
40 views

Trying to read and write EF's on a smartcard

Please bear with me, I'm just starting to investigate communicating with smart cards via winscard.lib from within Windows. It is not my intention to try and crack them, I'm just trying to learn the ...
0
votes
0answers
16 views

accessing file through an RDC or sharing across network more secure?

Question: Which is more secure? The Goal: Billy works in an office that is setup on a domain and needs to create files then have a different department access them. Option 1: Billy rdp's into a ...
21
votes
3answers
2k views

Would it be plausible to write your own anti-crypto-ransomware tool? [closed]

Question After reading about how basic ransomware targets and encrypts your files. I was wondering if it would be plausible to write your own script to try and detect such activities? Initial ...
3
votes
2answers
172 views

How to detect if files were saved or copied from an external hard drive/USB?

Is it possible? If so, how? This is needed to alert on the copying of "important" files. An example of what I need: There is a document on an external hard drive/USB. You're just allowed ...
1
vote
2answers
31 views

Protect Public Directories Linux

Just for a brief overview. I have a system that can generate invoices and has a login system for a user to generate his/her invoices. Lets say the platform resides at /platform and the invoices in /...
7
votes
1answer
138 views

How to spare file server data from being held hostage by client ransomware?

Suppose in a network there is a file server which's storage is shared between all workstations and all users require full read/write access to this storage for their cooperation workflow. (Over samba, ...
9
votes
3answers
599 views

Is denying write access an effective way to stop ransomware?

I'm looking for ways to defend against ransomware. As part of this strategy I've come up with the idea to block myself from writing to as many locations (and files) as possible. It may be assumed ...
1
vote
0answers
35 views

Why doesn't homebrew fix file access problems by itself?

Before I took ownership of /usr/local, "brew link" caused a "/usr/local/..." not writeable. Is there any particular security reason why the program didn't say something like "The operating system won'...
3
votes
3answers
170 views

Is random URL token secure enough for file attachments and other user content? [duplicate]

Lets say we have a hypothetical system where there are various files are added by users and are sensitive, e.g. lets say an attachment to a private message. It's not that easy to verify access rights ...
2
votes
1answer
111 views

Security implications of the contents of /proc/self/environ in LFI attacks

During penetration testing on a website, the tests have found a local file inclusion vulnerability in an old wordpress plugin that was installed. An attacker can exploit the LFI vulnerability to ...
20
votes
2answers
4k 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) ...
5
votes
1answer
111 views

How to grant permission to read a text file to a specific application run by a regular user?

A text file is situated in /opt/somefolder. It contains a pair login - password read by an application when authenticating on a server. The application is run by a regular user, so that the file can ...
4
votes
4answers
290 views

How can I prevent someone from carrying out a file from a machine

Assume the following scenario: You have to set up a machine in a way that a user is unable to bring out a certain set of files (or a single file only) from that machine while he has to be able to ...
0
votes
5answers
164 views

How to make sure nobody has read this!

Is there any computer/server which would allow me to get "guaranteed read access history" for files? For example, suppose I made a file with my plaintext passwords and simply wanted to make sure that ...
2
votes
1answer
64 views

How original PDF books get out of the publisher's reach and appear online for pirate downloads? [closed]

If a scanned book appears online for pirate download, it's no wonder: someone who had a hard copy just scanned every page. But there are a lot of PDFs out there that look like official publisher's ...
1
vote
1answer
42 views

Is it possible to log all file reads performed by an application in Windows 7?

I have a piece of software I'm supposed to be running on my computer. The only thing I'm slightly worried about is the files it reads, as it's closed-source and slightly fishy. I know it's not ...
5
votes
3answers
7k views

How to restrict skype file transfer outside of LAN

We are a mobile application development company. Due to the security of Source Code and other files, we need to restrict Skype file transfer outside of LAN. How to restrict Skype file transfer ...
3
votes
2answers
148 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 ...
3
votes
2answers
166 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. ...
0
votes
1answer
196 views

I need to transfer user's private key (RSA) to my App. Is file sharing a good solution?

I've asked a similar question here earlier iOS: Is it ok to store a RSA private key (use to decrypt text) in your application document directory? However, the person recommend me to use keychain ...
1
vote
1answer
93 views

Do file hosting services check user data manually by human? [closed]

I wonder if file hosting services like Dropbox, MediaFire, OneDrive, Google Drive, etc. manually check user data for piracy or copyright infringement. Although their terms of service always say that ...
1
vote
0answers
69 views

Potential security issues in a two-part upload process

I use a pre-signed URL approach for uploading files to a private S3 bucket. A CloudFront distribution is configured to use this bucket as the source. The upload process is only available to ...
1
vote
2answers
173 views

What are hardened ACLs for the Windows %systemroot% folder?

What are the recommended file permissions for %systemroot% in Windows 8.1? I couldn't find hardened file system permissions to apply to better secure a Windows installation.
1
vote
1answer
91 views

Solutions to decrypt data on access

I want to store sensitive data on on my (public) linux server. Also, I want to be able to access the data from different locations and different OS without much hassle. I thought about using a (simple)...
0
votes
2answers
107 views

Windows / Sensitive Data / Prevent access by various process

It's my understanding if you're logged into your Windows PC as DOMAIN\DUDE.NAME and you have access to \DOMAINFILES\SECRET STUFF\SUPER SECRETS.xlsx any process you run can also access that file - ...
2
votes
3answers
896 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 ...
1
vote
1answer
53 views

Protecting the root ca bundle

Applications (e.g. Firefox) often include a root ca bundle file containing trusted certificates. How can I protect those files from malicious agents trying to modify them? I think signing is not an ...
5
votes
1answer
439 views

How to to make a file private by securing the url that only authenticated users can see

I was wondering if there is a way to secure an image or a file to be hidden when it is not authenticated. Suppose there is an image in my website which can only be seen if that user is authenticated. ...
1
vote
3answers
481 views

Can an attacker spoof an IP address to access my .htaccess protected file?

Let's say I lock down my site through .htaccess and say DENY FROM ALL ALLOW FROM myip how involved is it for a hacker to to simply spoof their IP address to match whatever mine is and gain access? ...
16
votes
6answers
10k 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 ...
2
votes
1answer
1k 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?
10
votes
3answers
2k 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, ...
3
votes
2answers
2k 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 ...
0
votes
1answer
344 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
230 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 ...
1
vote
2answers
210 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 ...
4
votes
2answers
1k 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 ...
1
vote
1answer
492 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 ...
12
votes
3answers
37k 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 ...
0
votes
1answer
93 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
356 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
1k 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 ...
4
votes
1answer
2k 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 ...