2
votes
2answers
5k views

how to identify p2p on network

Im trying to work out if the traffic in the below image is P2P file sharing? If you notice the source ports are all random but the time 17.24 from c.port 58338 runs for a good length maybe about 400 ...
5
votes
1answer
396 views

SSL CipherSuite Choices

In SSL/TLS, is the CipherSuite chosen by the server or the client? Also, can the certificate in any way dictate or modify the CipherSuite?
-7
votes
4answers
497 views

Is TLS-in-TLS supported in any software? Does it make sense? [closed]

I got fun idea how to increase the security of the SSL (TLS) for websites. However I think there is no support for it in the browsers, so I thought I could add it eventually, but have no idea if it's ...
1
vote
3answers
2k views

How to setup an internal firewall

I'm hoping to get some advice on a project I've been asked to look after at work. I do all of the IT for a small company that sits inside of a larger corporation. We need to prevent access to ...
1
vote
3answers
310 views

Does this kind of hashing exist?

Let's say you have two user defined strings, X, Y and you want to hash them into the hash Z. That is what most websites would do, X is the user's password and Y is the salt. It takes a lot of time to ...
1
vote
1answer
1k views

How secure is github's whitelisting CORS domains?

The Github API allows you to make requests using CORS [1]. The CORS requests are only allowed by certain whitelisted domains : Any domain that is registered as an OAuth Application is accepted. ...
3
votes
2answers
4k views

SUN Remote Procedure Call Port 111 [closed]

I have found on my machine port 111 is open. This is listed as RPC. I understand there are possible attacks on this port. How can my machine be attacked if port 111 is open? How can I secure this ...
41
votes
3answers
17k views

Recommended # of rounds for bcrypt

What is nowadays (July 2012) the recommended number of bcrypt rounds for hashing a password for an average website (storing only name, emailaddress and home address, but no creditcard or medical ...
3
votes
0answers
208 views

How secure is HTTP basic authentication over SSL? [duplicate]

Possible Duplicate: Is BASIC-Auth secure if done over HTTPS? I want to set up a web server on a computer at home which will basically do no more than send the browser a file which contains ...
2
votes
3answers
879 views

Differences between brute forcing access versus decrypting password files or databases

I was just reading about how it's better to use bcrypt to protect passwords instead of saving password hashes in databases, and that got me thinking about other aspects that hackers work on that I had ...
0
votes
3answers
10k views

Win Server 2008 RDP Attack

On one of my machines I run Win 2008 R2 server. It has been recently updated. My RDP session is limited to my IP address only and firewall is UP. Even though the main RDP post 3389 is blocked by ...
54
votes
9answers
23k views

Why Disallow Special Characters In a Password?

The culprit in this case is a particular (and particularly large) bank that does not allow special characters (of any sort) in their passwords: Just [a-Z 1-9]. Is their any valid reason for doing ...
7
votes
2answers
6k views

Need help identifying the OSX process that's generating strange network traffic

Since the past few days, I noticed that my router was a bit slow, and was restarting by itself at times. When looked at it's logs, they had entries like: Friday Jul 13 13:09:02 2012 1 Blocked by DoS ...
9
votes
2answers
3k views

Is it possible to do HTTP header injection if CR/LF are stripped?

In HTTP response there is the following header with attacker controlled content: Content-Disposition:attachment; filename="attacker_controlled.html" The only characters that can't appear in ...
5
votes
4answers
4k views

How does a trojan like Trojan:JS/BlacoleRef.BV infect a website?

Today I find out my website is infected with Trojan:JS/BlacoleRef.BV. The server is a shared server from a hosting company. How does a trojan like this get on the webserver?
6
votes
6answers
10k views

Can you recommend a good book on Backtrack/Metasploit?

I have just downloaded Backtrack 5 R2 with Gnome and, while it looks cool, I don't really know where to start. I see it comes with Metasploit but, to be blunt, I still don't really understand what ...
2
votes
1answer
343 views

How does malware such as Stuxnet and Flamer propagate through USB memory sticks?

The best explanation I found is from this article but it still is unclear to me. Apparently a new vulnerability has been found involving .lnk files where when a folder on the memory stick containing ...
6
votes
1answer
20k views

Repairing corrupt TrueCrypt volumes/disks?

(I'm asking this for a friend of mine as I'm trying to help him with this problem over remote desktop, so if any details are needed, just ask and I will get them). Two entire hard disks were encrypted ...
2
votes
2answers
1k views

How are signatures for IPS determined

For example , how do Snort's VRT team or some one who gives us the signatures, determine them at all ? I would be more interested to know , how are the traffic patterns analyzed against some known ...
14
votes
4answers
3k views

Why do browsers warn about mixed content for images?

I'm dealing with a phpBB forum user who wants to set up SSL on their entire site to secure user credentials and "private" parts of the website. However, they want to preserve the traditional forum ...
1
vote
1answer
465 views

What torrent software should I be aware of as a security professional? [closed]

I am new to the torrent world and want to experiment / learn with the lowest risk possible. What do I need to know about torrent software, and related software and network configuration in order to ...
-6
votes
2answers
746 views

End of mail spoofing?

I've made the simplest e-mail program in C#. using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text;...
1
vote
2answers
243 views

I want to remove my WAP access list

Background: Fabrication of data is a high security concern Interception of (most) data is a low security concern Destruction of data is a medium security concern (everything is backed up, but ...
1
vote
2answers
827 views

Closing handles of a process as a regular user

Here's the situation: As an adminstrator, I am able to stall the application by closing 2 handles held by the process. (Using ProcExplorer) . Is there any way/hack I can use to close file handles ...
4
votes
3answers
619 views

Protect our payroll data from a legal and moral obligation

We have our payroll software to be installed on our file server. This contains all the details of current and past employees. The data contained in the payroll software includes tax, bank, National ...
12
votes
4answers
4k views

Challenging challenge: client-side password hashing and server-side password verification

We have a website where users need to log in to access privileged information. Obviously we are using SSL, but I also want to avoid plaintext passwords from accidently ending up in server logs, or ...
8
votes
2answers
340 views

What are some good arguments for having your work send you to e.g. DEFCON or Black Hat

What are some good arguments for getting your work to send you to the popular con's? Some of them can involve quite a bit of travel cost thus increasing the need for good arguments for going. I'd ...
-1
votes
1answer
228 views

Why don't G+, Facebook and Twitter use text editors to share? Why would someone receive each separately? [closed]

I've seen sites use text editors as below: What is the risk in using these? G+ receives images individually, others receive it all at once. Could someone shed some light on it?
8
votes
6answers
11k views

Security testing plan template or example

What does a security testing plan look like? Can anyone point out a template for such a document or an example?
-3
votes
6answers
587 views

Is this password hashing method secure?

I have made a custom hashing method to help make my users' passwords more secure if the database will be leaked. The encryption method is like this: A method takes an input of 1 character, gets the ...
1
vote
1answer
895 views

How to fix the audit failure in our web server

We noticed that we are getting the following audit failure logs in our web server. The workstation is not in our network. Can anybody help me how to isolate and prevent this from happening? An ...
5
votes
3answers
7k views

PHP crypt() or phpass for storing passwords?

When storing passwords, should I use PHP's built in crypt or phpass? If using crypt, should I use CRYPT_SHA512 or CRYPT_BLOWFISH?
7
votes
5answers
2k views

How to destroy old credit card?

What is the best (in terms of security) way to destroy old (but still working) credit card?
3
votes
2answers
1k views

SASL Authentication Protocol with No Cleartext passwords

As you know, LDAP supports three authentication mechanisms: anonymous, simple and SASL. The first one is only suitable for particular cases, and therefore I'm not going to talk about that. The ...
10
votes
4answers
10k views

How can I identify that my page is requested by robot, but not user's browser?

How can I detect that my page is requested by robot, but not user's browser? I'm aware of basics tricks: Watch for incorrect headers or urls. For example, urls with hash or header with full url - ...
1
vote
4answers
846 views

Security risks of hosting user-supplied images?

I have a program that will accept and fetch images from urls. It will check if the extension is .png, .jpg, etc... I will fetch these files and store them, they will be shown to users in a gallery (...
21
votes
3answers
15k views

Is there a way to mitigate BEAST without disabling AES completely?

It seems that the easiest way to protect users against the BEAST attack on TLS <= 1.0 is to prefer RC4 or even disable all other (CBC) cipher suites altogether, e.g. by specifying something like ...
3
votes
5answers
565 views

Can web application do anything to prevent risk from client-side malware?

Client side malware (keyloggers, screenscrapers etc.) is a great risk. It can't be effectively stopped from side of ordinary application. Only users themselves can do some measures to prevent risk ...
4
votes
1answer
2k views

buffer/heap overflow - register of what is executed

When buffer overflow/heap overflow is executed, is EIP the one that tells which part will be executed next? Also, when exploiting the part that has buffer overflow vulnerability, after execution, will ...
1
vote
3answers
519 views

Is this approach of securing cookie secure?

I could not find writeups about secure cookies so I have done some thinking. (I already have a "secure" password database with bcrypt and salt) Steps: User logs in Save user IP + randomstring in ...
0
votes
3answers
792 views

SQL injection explanation

I just found in logs that someone try to exectue this SQL injection /commands.php?id=-1+union+select+0x6c6f67696e70776e7a,0x6c6f67696e70776e7a,0x6c6f67696e70776e7a,0x6c6f67696e70776e7a,...
1
vote
1answer
856 views

SSL Inspection - how should it be done?

I've seen several questions that deals with SSL Inspection, none of them really carried a detailed response on the secure way of doing so. The reason I'm asking is because of this: Cyberoam fixes ssl ...
4
votes
3answers
12k views

How do you properly setup Tor on Windows 7?

How do you properly setup Tor on a Windows 7 box to guarantee that ALL connections will run through Tor?
2
votes
2answers
784 views

Interesting article on a vulnerability found in Tor

This article describes how French researchers compromised users using Tor. I'm not sure I fully understand or agree with it. I don't see what Bit Torrent has to do with anything? I mean they start out ...
2
votes
0answers
66 views

Using GPG or PGP for symmetric database encryption/decryption in c# [duplicate]

Possible Duplicate: Using GPG or PGP for symmetric database encryption/decryption in c# I am looking to symmetrically encrypt/decrypt information in a database. This info consists of short ...
3
votes
1answer
1k views

Using GPG or PGP for symmetric database encryption/decryption in c#

I am looking to symmetrically encrypt/decrypt information in a database. This info consists of short pieces of information, which need to be individually encrypted when a specific method is called. I ...
6
votes
2answers
4k views

Safely disable firewire/thunderbolt, patching up DMA exposure

I understand that Firewire 400/800 and Thunderbolt have DMA enabled, and a malicious hardware device can easily read and manipulate system memory at will. If I disable the software drivers for these ...
22
votes
2answers
9k views

When using AES and CBC, is it necessary to keep the IV secret?

If I encrypt some data with a randomly generated Key and Initialization Vector, then store all three pieces of information in the same table row; is it necessary to encrypt the IV as well as the Key? ...
6
votes
1answer
2k views

Comparing the standard HTML form POST for user authentication vs Javascript/AJAX

Are there any security implications with POSTing a authentication request with the use of javascript/ajax, as opposed to POSTing an HTML element by pressing the submit button? thus <form method="...
4
votes
1answer
368 views

Custom EC2-style user authentication system - how secure is it?

At work I'm trying to design a user authentication system that is session-less (including session based tokens such as those used in OAuth2) due to client software requirements. The services are REST ...

15 30 50 per page