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.

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Breaking out of a strict linux sandbox running virtually under windows: do the linux-sandbox access control policies even matter?

I am developing an application which will run untrusted code. I have been designing it for linux, thinking that I can just run it in a virtual machine on windows when the need arises. The linux ...
28
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19answers
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 ...
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1answer
223 views

Can HIPS software practically be considered a form of MAC

Host Intrusion Prevention Software can restrict applications from taking certain actions regardless if they have the privileged to do so as assigned by the operating system. Given that with the use ...
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5answers
653 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 ...
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2answers
680 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 ...
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2answers
831 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?
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2answers
376 views

Star property in read/write access

The * star property requirement for append access [SC(S) <= SC(O)] is looser than for write access [SC(S) = SC(O)]. Can someone explain the reason for this?
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3answers
2k views

Bell-LaPadula imlementation example

I'm currently studying the Bell-LaPadula model and i need to do an implementation as an example. I understand how the model works, but I have difficulties implementing it in a programming language ...
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7answers
1k 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 ...
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3answers
216 views

Remote Connection Tampering

My small high street laptop repair/service/maintenance shop has been up and running for about 3 years. It's doing quite well so I'm looking to expand into other areas of the PC market. One area I ...
8
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1answer
200 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 ...
6
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3answers
156 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 ...
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1answer
706 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 ...
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4answers
686 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 ...
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1answer
602 views

Securing sensitive data in a DB,is using H2 worth it?

I am designing a web application at the moment, and one of the requirements is to secure the user credentials as well as their roles. Now ofc besides the usual pwd hashing + salt +.... I was thinking ...
2
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1answer
2k views

BLP Lattice-structered system from Access Control Matrix

I've been reading a Computer Security book by Walliam Stallings and have found this example: http://i.imgur.com/5CAlc.png of an Access Control Matrix. Any example will do I just thought I'd screenshot ...
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5answers
53k 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 ...
13
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2answers
479 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 ...
3
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2answers
223 views

Which access rights should be chosen for doku wiki?

I'm currently making my first experiences with a CMS called "DokuWiki" (Link). This CMS needs only PHP and writes the information to files (seems to be /dokuwiki/data/pages). At the moment I gave the ...
27
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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? ...
11
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3answers
16k 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 ...
4
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1answer
3k views

Windows task manager can see all processes as non administrator without permission

On Windows Server 2008 R2 operating as a standard user, when I open Task Manager I can see all the processes from different users on the system. I have the option to click "Show all processes" which ...
6
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1answer
517 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.
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2answers
257 views

Can you pick up any device specific information by monitoring bluetooth signals? [closed]

Could I use some sort of permanent device ID broadcasted by the bluetooth radio in my phone to do something like unlock my door? I don't want to have to ever pair the device, or take it out of my ...
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1answer
785 views

Does Fedora 15 still use suid bits?

I heard that Fedora 15 will not use suid bits. Is that true? Is the suid bit a security design bug?
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3answers
338 views

How do I clearly distinguish between groups of formal and informal models?

I'm currently studying for the CISSP exam and would like to ensure that I'm using proper terminology when referring to models. I'm a little confused because I'm coming across generic and specific ...
8
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1answer
248 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 ...
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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 ...
4
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2answers
139 views

Is it correct to consider audits as exclusively “detective” in nature?

I'm studying for the CISSP exam and one of the video lecture points didn't quite make sense to me. The instructor was discussing access control administration areas and began categorizing certain ...
4
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1answer
707 views

Is it correct to consider Task Based Access Control as a type of RBAC?

I'm studying for CISSP certification and one of the video lectures I viewed (CBT Nuggets) really confused me. Here are some excerpts from the lecture: "Role Based Access Control doesn't ...
4
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3answers
175 views

(custom software) Security rules on each record when using user-groups per application

I'm working with custom software here, so don't worry about Microsoft whatever, Open anything, or something else. Let’s stick to theory of how this should go together. Let’s say I have a user ...
11
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3answers
212 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 ...
5
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3answers
1k views

Why does the ★-property rule of the Bell-Lapadula Model allow information to be stored in objects with HIGHER sensitivity labels?

I'm self-studying for the CISSP exam and am having difficulty wrapping my mind around the practical side of the ★-property rule in the Bell-Lapadula Model. I understand the mechanics of it and that ...
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3answers
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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 ...
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3answers
946 views

Security Architecture - Settings to drive UI and Privileges (Rights) - Role-Based, per User-Account

How do large companies implement their security requirements which are centralized and used to drive things people can do (allowed to call a certain web-service, submit an order, etc.) as well as to ...
5
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1answer
612 views

access control to data-center using rfid

I don't know if "here" is the right place to make this kind of question... so here it is.. Is rfid a good solution for controlling access to a data-center? Because rfid is "wireless", is it ...
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1answer
1k views

Clark Wilson Integrity Model: Rules

What is the conceptual difference between certification rules and enforcement rules in the Clark Wilson model? Am I on a wrong path when I assume that certification rules ensure external integrity ...
7
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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 ...
14
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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 ...
10
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3answers
435 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 ...
5
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1answer
1k 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 first icalcs return Mandatory Label\Medium Mandatory Level:(NW) for second icalcs doesn't return anything (that means ...
3
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1answer
781 views

I'm using a Cisco ASA as a VPN endpoint. Where do the VPN clients get firewalled?

(Is this too application specific? It seems like a reasonable question that would be useful to other people...) So, I've got this ASA in front of a network that I didn't set up. It's been ...
12
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3answers
5k 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 ...
7
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3answers
581 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? ...
6
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2answers
2k views

Bell-LaPadula and Biba Together

Theoretically, could the Bell-Lapaluda security model be implemented with the Biba integrity model in an Operating System? Or do are they mutually exclusive? [Edit: Follow up from this question on ...
5
votes
2answers
155 views

How is the password prompt going to protect me from ruining my computer?

On Unix based systems, I'm often prompted to enter my password before installing or running a program. Why does this protect me? If I'm running a kiosk, I understand that a password might prevent ...
7
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2answers
311 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.
9
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4answers
787 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 ...
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1answer
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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 ...