A security mechanism which enforces policy describing which requesters may perform operations on specified objects. There are typically multiple types of operations. Common operations include: read, write, execute, append, create, and delete.

learn more… | top users | synonyms

47
votes
8answers
7k views

Risks of giving developers admin rights to their own PCs

I need to convince my internal IT department to give my new team of developers admin rights to our own PCs. They seem to think this will create some security risk to the network. Can anyone explain ...
46
votes
8answers
3k views

I'm an IT consultant. Should I discourage a client from telling me his password?

I'm an IT consultant. One client has known me for a few years. He wants me to do some work on his kids' laptop again. I'll need to log into his kids' Windows user account. (I'm guessing that multiple ...
43
votes
5answers
3k views

How does a country block its citizens from accessing a site?

Following Turkey's recent social site blocks, I am wondering how can you efficiently accomplish that as a country. Similar for a big company. Blocking IPs → easy to circumvent, (proxys, tunnels, ...
40
votes
9answers
7k views

Why am I allowed to access protected Windows files when I boot Ubuntu from USB?

How come I'm allowed to reboot a computer that I don't own, put in a USB, boot ubuntu from it and then access all files stored on the drives available (even critical files such as system files on C ...
28
votes
20answers
3k views

How can I prevent my kids from bypassing my computer restrictions?

My son has a downloaded copy of Ubuntu that he uses to "break" into my computer, bypassing Vista. I have two questions: Can this damage my computer or corrupt my files? (I have lots of pictures) Is ...
28
votes
4answers
3k views

Are there DRM techniques to effectively prevent pirating?

A question on Skeptics.SE asks whether current DRM techniques effectively prevent pirating: Is DRM effective? The question for IT Security is: Can DRM be made effective, and are there any examples? ...
21
votes
7answers
6k views

If a Windows laptop with an encrypted hard disk is stolen, can the contents be accessed by a professional hacker? [closed]

In other words, how easy is it to break into Windows without having the passwords for any of the users configured in the computer?
21
votes
1answer
12k views

What is the difference between RBAC and DAC/ACL?

What are the benefits of each, and when should I choose one over the other? Are there situations where these should be merged? Do you have examples of common usages? And what about MAC, where ...
20
votes
11answers
7k views

Prevent my site from being copied

Is it possible to protect my site from HTTrack Website Copier or any similar program? Without setting a max number of HTTP request from users.
19
votes
7answers
2k views

In Healthcare IT, is a “break glass” mode to bypass access controls commonly required?

I've seen referenced in literature the need to have a "break glass" mode in Healthcare IT applications. In this mode, the access controls in an application can be bypassed for an emergency when it is ...
18
votes
1answer
94k views

Why can you bypass restricted WiFis by adding “?.jpg” to the URL?

I recently read an article on Hacking a commercial airport WLAN. It's basically about circumventing paid airport WiFi redirections (they redirect you to a certain URL when you type something in the ...
17
votes
4answers
759 views

Securing an area both physically and technically

I work for a commercial printing company, and we're beginning to get a couple jobs labeled "High Security". Essentially this means that if any pictures/information/files/etc. of the product were ...
16
votes
3answers
7k views

Router password vs MAC filtering?

I just bought a Galaxy S4, and it didn't connect to the WIFI in my house (I have a 14$ router). After a bit of testing, I've decided to leave my connection open without a password, but added the ...
16
votes
3answers
410 views

Risks of Mullions in High Security Areas

I have a storage space full of information assets. The room itself is sound; there are no windows, the walls go all the ceiling, and there is only a single entrance with two good stout doors and high ...
15
votes
7answers
956 views

My company policy states I must put all passwords in a password safe shared with management. Is this secure?

As the title says, my company has a policy that all passwords to e.g. our workstations and server logins must be stored in an online safe. I won't say which one but there are some out there you can ...
15
votes
5answers
60k views

Can someone steal money from my bank account if they know my IBAN and personal details?

To deposit money into your account, some websites require that you provide them with a lot of details about your bank account: name, complete address and IBAN which includes your account number and ...
15
votes
6answers
13k views

Is it possible for a hacker to download a php file without executing it first?

I have a php website where everything is in the public_html\ folder, including inclides folder with config and classes. I told my developer to move it away from public folder but he said there is no ...
14
votes
5answers
2k views

Comparsion Between AppArmor and Selinux

I was reviewing several different comparison of AppArmor and Selinux which include Why I Like AppArmor More Than SELinux SELinux and AppArmor: An Introductory Comparison From these articles I ...
14
votes
4answers
3k views

Protection against account lockout DoS

Any ideas on how to protect against the following scenario? Company x uses active directory for authentication of it's employees. The company has multiple authentication points that are semi-public ...
13
votes
1answer
738 views

Are there Linux rootkits circulating that directly modify the kernel (without modules)?

It has been said, over and over, that disabling dynamic kernel module loading on Linux increases security. I understand why people give this advice, but I've always assumed that a bad guy could ...
13
votes
2answers
518 views

Network policies under AppArmor/SELinux

I am attempting to sandbox some untrusted processes using Linux's MAC frameworks -- either SELinux or AppArmor. I see that both SELinux and AppArmor allow the selected granting of socket level access ...
12
votes
3answers
6k views

Prevent acccess to the C drive on Windows systems

Is it possible to prevent regular users from accessing the C drive via Windows Explorer? they should be allowed to execute certain programs. This is to ensure that employees cannot steal or copy out ...
11
votes
3answers
451 views

Given SSH access, what should I do to protect a server and monitor (dangerous) user actions?

Context: Small business, mostly a software house for web applications but also some desktop software. Many external collaborators, so a variety of outside users with access to the servers. Single ...
11
votes
3answers
20k views

How do you discover what permissions an AD group has, if you have no documentation?

You just got hired at company A and the old administrator is no longer there. Requests start coming through for adding users to the internet restrict group. When you look at the groups none of the ...
11
votes
3answers
223 views

Different MySQL Users Security Benefits

Anyone with a brain cell knows that using a user that isn't root/dbo/etc adds a lot to security and how effective SQL injection attacks can be. I'm wondering if taking that idea a step further is a ...
10
votes
6answers
2k views

Difference between Privilege and Permission

I am a little confused on the contextual differences between permission and privilege from computer security perspective.Though I have read the definition of both the terms but it will be nice if ...
10
votes
6answers
1k views

Alternative to VPN

We have a network that is completely closed to the outside world. It needs to be. Problem is we need to remote into a server on this network once in a blue moon for diagnostics. We've discussed ways ...
10
votes
4answers
2k views

Role Based Access Control + Data Ownership based permissions

Is there a common system or pattern that combines the permissions given by a role in a RBAC-system with permissions in relation to dataownership? For example: Bob is a doctor and has the role ...
10
votes
2answers
1k views

Why do some Java APIs bypass standard SecurityManager checks?

In Java, normally permission checks are handled by the SecurityManager. To prevent untrusted code from invoking privileged code and exploiting some bug in the privileged code, SecurityManager checks ...
10
votes
2answers
2k views

Is there a secure way to have a publicly facing terminal server?

TL;DR We are looking at opening port 3389 for a terminal server all the advice I’ve seen is that its suicidal but without good explanations as to why. Is it really that bad? We are looking at setting ...
9
votes
2answers
972 views

Best practices for implementation of role-based access control in healthcare applications

Amongst the open source EMRs, which ones may be good to learn from? Any references I can go to as a starting point?
9
votes
4answers
828 views

RBAC model: user in two roles access dilemma

I am implementing the Role-Based Access Control (RBAC) model security system and I have a dilemma: one User1 is in Role1 and is in Role2. Role1 allows access to the Resource1 and Role2 denies access ...
8
votes
2answers
240 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 ...
8
votes
1answer
288 views

What is a practical example of an action that violates the non-interference model?

I'm studying the non-interference model as part of CISSP prep and am having trouble thinking of a practical example where a violation would be involved (and the consequences of those violations). I ...
8
votes
3answers
1k views

Practical non-government uses of Biba, Bell-LaPadula, etc. models

For example, the Biba model is now hanging out in current versions of Windows. Things downloaded from the Internet are tagged as such. Internet (low) stuff can't alter user (medium) stuff which isn't ...
8
votes
1answer
577 views

How to prepare for protecting identity after death?

In the context of online accounts and identities, what are some best practices to prepare for the one certainty we all face: not a one of us will get out alive.
8
votes
1answer
204 views

What practical uses are there for the AD feature of “Confidential Attributes”

Are any applications (off the shelf, or internal) leveraging Active Directory's Confidential Attributes? Would you store sensitive information here such as a private key, or a salt here? I'm ...
7
votes
3answers
608 views

What prevents this exploit from working (unix SUID)?

If I have a user on a unix system where Im allowed to create new files, what prevents me from downloading an executable file onto that system which is already SUID'ed to root on a different system? ...
7
votes
2answers
835 views

What is the procedure to follow against a security breach?

Last week, a couple of guys were fired from the company I work for; all of them had access to sensitive information. One of them erased all the e-mails from the mail server, sent a massive e-mail to ...
7
votes
3answers
2k views

User “home directory” on iPhone, Android, Windows mobiles and Blackberry

Is anyone aware of any mobile (iPhone, Android, Windows mobiles and Blackberry) Operating System that support multi users? I am not aware but I thought it is worth double checking. Off course, in ...
7
votes
3answers
384 views

Is it advisable to have a web browser remember login credentials?

I have a really long random password for my cellphone account and have it written down in a safe place. I only use it once a month and am considering having my browser remember it. Would there be any ...
7
votes
2answers
320 views

How is UAC a security improvement?

What does User Account Control on Windows offer in terms of security? It's just an extra click to potentially run a virus.
7
votes
2answers
1k views

What's the difference between an access control method, security model, and security policy?

(I should apologize in advance because this question is going to be messy -- I'll try to refine it as the subject becomes more clear to me). I'm studying for the CISSP exam and I'm getting confused ...
7
votes
1answer
195 views

Using / finding covert channels in inter-process communication

I've got a class exercise that involves a virtual game of Werewolves/Mafia. We're not really taught how to do anything in this class, which makes it hard for everyone to do the labs. The idea is that ...
6
votes
6answers
413 views

Disable internet access of development PC for security

My friend's company is trying to disable Internet access of programmer's primary development PC to improve security, while giving them another PC to connect to the Internet. He is a web programmer. I ...
6
votes
5answers
736 views

What is the practical difference between MAC and Capabilities

Both Mandatory Access Controls and Capabilities allow for fine grained privileges to be assigned to applications irrespective or in place of privileges inherited by the running user. Is there any ...
6
votes
3answers
158 views

Requiring Authentication to Exit

I've often wondered why facilities do not require authentication as a default on exit. Beyond the oblivious reasons: Fire safety policies would require a panic mechanism to override the access ...
6
votes
4answers
1k views

Safest way for multiple users post to a single social networking account

Suppose I have a team or organization managing a single twitter account and a single facebook page. Different users need to be able to post content to the same account. How can I minimize the risk of ...
6
votes
2answers
796 views

How do I log everything a certain program is doing?

i have a program which is pretty simple. Its just a simple login form. Is there any possibility to log what this program is doing (maybe which file he is accessing and which website he is visiting ...
6
votes
2answers
322 views

Full-disk encryption and theft mitigation?

Is it possible to combine the security of full-disk encryption (e.g. Truecrypt) with the honeypot-like performance of anti-theft tools (e.g. Prey)? In other words, is it feasible to have both strong ...