Solved

File folder permissions for Linux web server (Amazon EC2)

Posted on 2014-01-05
3
1,070 Views
Last Modified: 2014-01-06
hi guys

I have a web server in the cloud hosted with Amazon cloud. It's a linux server.

Not long ago, the website was badly compromised due to flaws in the PHP code. So the hacker was able to 'inject' some sort of code and was able to make changes to the php file.

The security holes in the PHP code have been patched. However, we're still worried of something like that happening in the future.

As it stands, the files and folders on the public facing side seem to have the 775 permissions. The owner of this group is the actual EC2-user, which is the default user. However you can only access the files/folders as this user if you have a special private key, otherwise you can't (well, the hacker evidently did when the site was vulnerable).

Question is, if this was you, how would you tighten the security? Would you create a new user and set all files and folders on the public side to have 755 permissions and make that user the owner of those files/folders?

thank you
Yash
0
Comment
Question by:Yashy
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 35

Expert Comment

by:Duncan Roe
ID: 39757895
If you can get in as owner, you can always change permissions. Do the files need to be group-writable? They should only be group writable if it's actually necessary.
0
 
LVL 1

Author Comment

by:Yashy
ID: 39758040
The don't need to be group writeable no.

Point is, the new user I create will be given to our developers. So in terms of ownership, what would you change? (if i'm being too vague, let me know what you need and I'll provide more info)

THanks
0
 
LVL 35

Accepted Solution

by:
Duncan Roe earned 500 total points
ID: 39758684
As root, I would do a chown -R on the system so all the files belong to the newly created user. Still no need for group write I should think.
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A customer recently asked me about anti-malware and the different deployment options available for his business. Daily news about cyberattacks, zero-day vulnerabilities, and companies that suffered a security breach made him wonder if the endpoint …
In the first part of this tutorial we will cover the prerequisites for installing SQL Server vNext on Linux.
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
Both in life and business – not all partnerships are created equal. Spend 30 short minutes with us to learn:   • Key questions to ask when considering a partnership to accelerate your business into the cloud • Pitfalls and mistakes other partners…
Suggested Courses

615 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question