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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2
votes
1answer
405 views

How can the Google web crawler bypass portals?

This is a situation that I have encountered on a number of occasions. I will conduct a web search in Google, a link to a file (.pdf for example) will take you to that file on the server. It opens up ...
4
votes
1answer
142 views

Car Remote App Security

Car manufactures like BMW, Audi or Mercedes-Benz all provide mobile applications to control your car. All apps share really critical functions like remote lock/unlock or the ability to find your car ...
0
votes
3answers
254 views

What security issues will I face with outsourced VPS server?

Our small comapny wants to launch a paid service, hosted on the outsourced VPS server. The obvious risk is that the machine is physically not in our office and that possibly the database could be ...
1
vote
1answer
72 views

what are security flaws on providing access to users through a unlisted/private/token/signed URL?

Some web applications enable registered users to grant temporal application access to un-registered users sending token/private/unlisted/signed URLs (I ignore the exact terminology for this), which ...
1
vote
0answers
297 views

Since when Access-Control-Allow-Credentials is required?

About several years ago I found a website during a pentest which had the Access-Control-Allow-Origin header set to "*". I made a POC to get the response of a webpage from an untrusted domain. The goal ...
0
votes
3answers
55 views

Restrict access to admin area by checking SSH connections

Assuming that the users have dynamic IPs (so I can't whitelist) and that setting up a VPN is not an option, is it a valid approach to restrict access to an administration area by only allowing IPs ...
0
votes
2answers
92 views

How to handle data-dependent Claims?

This question is about Claims-Based Authorization and Windows Identity Foundation (unfortunately I lack the priviledge to create a tag for this). Consider the following simple use case: I have a ...
-3
votes
1answer
276 views

How could an attacker have gained remote access to my laptop? [closed]

I have a 15 yr old daughter who's become not only a certified Microsoft Expert, but by pure accident, it came to my attention she'd long ago created a SPLIT network connection on our internet, HIDDEN ...
-1
votes
2answers
459 views

Is there a difference between Broken Access Control and Insecure Direct Object reference? [closed]

According to me,if this difference is correct,it is that for exploiting a broken access control you don't necessarily need to be logged into the application,but for exploiting insecure direct object ...
6
votes
2answers
1k views

What are best practices for implementing ACL

I have a website that has certain menu items that need to be hidden from end users. The web site has PHP in the front-end and Java and Spring in the back-end, deployed on a Linux OS in a VM ...
5
votes
2answers
1k views

Claim Based Authorization vs Attribute Based Access Control

Is there a difference between Attribute Based Access Control which is usually associated with XACML and Claim Based Authorization which seems to be a term coined by Microsoft? Is the latter simply ...
5
votes
2answers
3k views

Securing remotely accessible IP cameras that do not support HTTPS

I have some IP cameras set up on my home network, which is WPA2 protected. These cameras are setup to be accessible from the Internet thru my router's DDNS address, and port number. So for example, ...
6
votes
3answers
211 views

Is SESAME really used in Europe?

I am looking at a text that mentions that the Secure European System for Applications in a Multi-vendor Environment (SESAME) was designed to address some of Kerberos weakness, with enhancements such ...
2
votes
0answers
789 views

Google ads and/or DoubleClick wants to access the keyboard API in Firefox? [closed]

I have started Firefox in an Ubuntu terminal, and now I see these messages during browsing: "No permission to use the keyboard API for http://googleads.g.doubleclick.net" I mean... WTF? Why does ...
2
votes
0answers
155 views

Can we create custom APDU for non-smart (memory type) contactless card?

I want to implement card-based authentication for the parking system in a university. Currently all students own a Java Card-based student ID card, if they have not broken or lost it. Can we create ...
46
votes
5answers
4k 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, ...
3
votes
1answer
1k views

Looking for approach to implement attribute based access control (ABAC)

We are looking to implement Attribute-Based Access Control. While we are sold on the philosophy, there are two topics that seem to crop up: Will it lead to significant performance issues? Especially ...
0
votes
2answers
101 views

Anonymizing data for applications

I try to design a system which reads events comming from devices, stores them and exposes API to various applications. Originally I wanted to introduce a module Id translator, so I would store only ...
1
vote
4answers
210 views

Comprehensive audit of firewall - is Internet truly not accessible?

We have many Linux servers in several co-locations over the world. By design, these machines generally should not be able to access the Internet. Depending on location and role, some sites may have ...
0
votes
3answers
326 views

Is a console application with NT Authority/System rights dangerous?

A developer managed to open a console application with NT Authority/System rights at the startup screen before logging in. From that command prompt it is possible to execute arbitrary programs like ...
0
votes
1answer
194 views

Employee Snooping [closed]

I just got hired at this SW tech company with a few IT gurus in it. There is a clever genius that is suspect. He obtained my personal home email address I use. It was obtained from company ...
40
votes
8answers
8k 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 ...
1
vote
2answers
75 views

user roles or access levels

I am beginning a new project and I already know that I'll have various roles for various users, regardless of their access level. They just have different jobs to do. With that in mind, I'm thinking ...
2
votes
2answers
120 views

RBAC and assertions, which authorization flow is better?

I'd like to ask which authorization flow is considered better or standard. First approach (has role AND assertion is valid): if (!isGranted(roles, permission) { return false; } if ...
1
vote
0answers
467 views

automatic connection from LSASS to different IPs. Is this the usual behavior?

I'm using windows 7. firefox 22. connecting through a regular residential wifi router. In the last month I've noticed that when I connect to the internet and once in a while my firewall indicates me ...
-1
votes
4answers
460 views

what will happen if us government shutdown Tier-1 internet backbone?

what will happen if us government shutdown Tier-1 internet backbone? Although Internet is designed to be quite resilient: Internet BackBone The Internet, and consequently its backbone networks, ...
1
vote
3answers
201 views

Resetting passwords howto

I am currently in the process of designing a registration form for the users to register accounts. The accounts will contain a lot of personal information, so I want to ensure highest possible ...
4
votes
6answers
2k views

Locking IP addresses to try and improve security

(Originally posted on the work place and was suggested to post here) I know being an employee I am paid to do what my boss tells me to do, however: I am currently writing a website for my company ...
1
vote
1answer
91 views

Security controls to implement on a private environment

On a large project, my company is responsible of administering the internal servers where applications used within the intranet are installed. One of our sites are accessible from outside but we do ...
0
votes
1answer
225 views

Difference between password expiration and account expiration [closed]

If a password expires, the user can't access the account. If the account expires, the user can't access the account... So, what's the difference? Just that in the case of an expired account, I'd need ...
0
votes
1answer
1k views

Protecting MYSQL with Fail2Ban? [closed]

I have a bunch Raspberry Pis collecting data from behind client firewalls. I want to start sending this data to MYSQL server. Because the Raspberry Pis do not have static IP addresses, I obviously ...
2
votes
1answer
615 views

Security implications of granting IIS user group folder modify permissions

I have an Application Pool in IIS running under the standard AppPoolIdentity as part of the IIS_IUSRS group. What are the security implications of granting AppPoolIdentity modify and create ...
1
vote
1answer
250 views

Is a separate server needed for remotely accesing accounting software?

Wishing you all a great 2014. I hope this is the right section. Basically we have a Dell Poweredge R520 server in our office, and we now want to install some accounting software that can be accessed ...
2
votes
1answer
70 views

Preventing softwares from leaving traces in Windows | deleting the traces easily

Say I open a .doc file from my UFD. I want to avoid leaving any traces in Windows (e.g. recent files, back-up files, swaps, etc) , or at least be able to delete all easily. So in this case, I want to ...
1
vote
1answer
143 views

Spoofing and guest network security

I know a little bit about network security but it's only about enough to know there's a lot I don't know. My requirement is to add a 2nd wifi to my current setup (1 wifi emitted by a ...
0
votes
2answers
54 views

Contents retrieved from a not protected url from content owner's server. Legal? [closed]

Is legal to use contents retrieved from a not protected url (no authentication involved, just a public accessible URL) from the content owner's server? Is legal to distribute urls pointing to that ...
1
vote
3answers
529 views

How do I restrict network access to LAN for visitors

How do I restrict network access to LAN for visitors? In my organization's premises any outside visitor can come and connect to the LAN ports in our meeting rooms. We have seen that they are able to ...
1
vote
2answers
261 views

Isolating guest networks

I'm setting up a secondary guest wifi on my router and I want to make sure that it's impossible for clients connected to the guest wifi to access my primary network. Initially, I used IP filtering ...
3
votes
3answers
190 views

Governement like classified information system

I need to implement a classification system for my company, similar to the government's. I'm working for a company working with the government. The classification system in my country isn't public so ...
2
votes
1answer
942 views

Is htaccess secure enought to whitelist clients IPs?

I'm using .htaccess to control source IP of connections to my web application. My configuration looks more or less like this: order deny,allow deny from all allow from X.Y.Z.Q These ...
3
votes
4answers
11k views

How to check if computer is controlled remotely

My laptop has windows 7 installed. One Saturday night I couldn't fall asleep and was just lying in bed. Then suddenly at around 2 in the morning I heard the fan of the laptop start up and lights on ...
0
votes
1answer
255 views

Can I use a vpn to securely use prototypes of webapps from my phone or laptop?

I want to experiment with web development (using django) for both desktop and mobile. Server, phones and desktops could all be part of the same virtual private network. The VPN will be from some ...
8
votes
1answer
488 views

What datastructure would/have you used to store ACLs within a hybrid ACL/RBAC system?

In our system, every resource has an access control list (ACLs), which list entries (ACEs) that have a specific kind of access to that resource. The ACE can be for end-entities (eg: users like "Mr Q") ...
-1
votes
1answer
124 views

physical access proof smart card for disk encryption [closed]

Current full disk encryption on mobile devices rely on low entropy passwords like PIN numbers or pattern locks. Being able to use a smartcard with such mobile devices is a tempting idea. I know that ...
1
vote
1answer
121 views

How secure is the web-based file browser that comes with my NAS?

I have a Buffalo Linkstation Pro 2 Duo for home use. It has a web GUI for browsing the contents of the NAS (distinct from the admin interface). The idea is that you would expose the web GUI to the ...
2
votes
2answers
229 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
382 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 ...
1
vote
1answer
79 views

Storing opened mail attachments unencrypted in /tmp is a normal thing?

So there is an E-mail client. I can encrypt its database with a few clicks in its menu. But it's storing the opened attachments unencrypted in /tmp/foo/bla.xls. The bla.xls has 644 UNIX permission ...
1
vote
2answers
210 views

How to restrict access to unwanted sites?

I use Ubuntu 13.10. I tried to used OpenDNS to restrict some websites. Unfortunately, I couldn't do that. I use AirStream 1200 USB modem to access WiMax internet. OpenDNS setting didn't work for me at ...
0
votes
1answer
68 views

access control-intersection of subjects’ permissions

In the book named "operating system security", I read this paragraph: "Protection domains can also be constructed from an intersection of the associated subjects (e.g., Windows 2000 Restricted ...