4
votes
3answers
628 views

Public key system confusion

I read the following about PKI: Using a public key system, a user may encrypt a portion of a document using his or her private key. This message will later be decrypted by the recipient using ...
5
votes
2answers
1k views

Scanning DVWA with w3af - Unable to detect SQLi when security on low

I've been messing around with DVWA (Damn vulnerable web application) and w3af. I've been scanning DVWA with w3af, and have used the spiderMan proxy and http config to setup auth credentials to get ...
5
votes
2answers
702 views

Could the bcrypt-ruby binding be vulnerable?

While developing a Ruby on Rails application using a commonly used authentication library named devise, I noticed from the prefix $2a$ of the produced password hashes in the application database that ...
0
votes
1answer
5k views

Dropbear SSH server use-after-free vulnerability

"This vulnerability is located within the Dropbear daemon and occurs due to the way the server manages channels concurrency. A specially crafted request can trigger a use after free condition which ...
7
votes
2answers
2k views

How do open source projects handle secure artifacts?

Specifically, how are things like keystores handled, or other items needed to build or run an app? In my case, I have a Chrome OS app that requires a keystore to build and publish to the Chrome Web ...
2
votes
2answers
304 views

Is it unsafe to allow apps other than Outlook to send email via the Exchange server?

My application is a .NET Windows Forms client, one of whose functions is to allow the user to send personalised mailshot emails to opted-in recipients stored in the database. The emails are sent ...
2
votes
2answers
460 views

Apple Mac Security - What do I need to know?

As I've been working on Windows machines most of my life I know most of the best practices and apps to keep them secure. When it comes to security on Apple macs I'm clueless as to where to start.
7
votes
2answers
5k views

How expensive is it to guess a 15 character password, and should I be worried?

I'm currently using AES encryption (at home) on GNU/Linux (one of LUKS AES-256 variants with xts) and on Windows 7 (Truecrypt) with a 15 characters password (alphanumeric lowercase only plus _). ...
11
votes
3answers
3k views

Installing Development Tools on Production Server? Security Risk?

I am using an Amazon Linux EC2 instance as a web server. My web app uses ImageMagick. Because the Amazon Linux (CentOS) repository doesn't include an up-to-date version of ImageMagick, I am compiling ...
11
votes
7answers
2k views

Prevent denial of service attacks against slow hashing functions?

I've been thinking about bcrypt recently, and what I wonder is if there's a way to deal with the inherent (D)DoS problems with slow hashing functions. Namely, if I set up bcrypt so my machine takes ...
1
vote
1answer
371 views

What are the most sophisticated techniques used by intruders you have found in the wild?

I am beginning to get involved in incidents, some of them are APT (Advanced Persistent Threat). Despite the complexity available in the 'bibliography' and in the conferences or security e-zine, the ...
0
votes
1answer
44 views

Secure intermediation of messages

Suppose there's systems A, B and C. A has an trusted relationship* with B and B has one with C. How can B intermediate a request from A to C while still providing both A and C the guarantee that ...
2
votes
1answer
4k views

Explanation of SSL handshake with certificate

I've read a lot of articles. The client uses the information sent by the server to authenticate the server. If the server cannot be authenticated, the user is warned of the problem that an ...
1
vote
1answer
948 views

Help with scope clarification of PCI requirement 8.5.15

Section 8.5.15 reads: If a session has been idle for more than 15 minutes, require the user to re-enter the password to re-activate the terminal. Section 8 Accompanying note reads: These ...
8
votes
4answers
715 views

Hash(master + hostname) password scheme for a server pool

I manage about 20+ Linux servers and I am considering using an md5 scheme similar to following to generate the admin passwords: echo 'masterpassword' 'serverhostname' | md5sum Which returns ...
3
votes
1answer
1k views

How to implement WSS UsernameToken when password on the server is salted and hashed?

I'm currently trying to write a web service for customer and requirement is to use WS Security. On their server side, they have passwords stored as SHA-1(salt+password). According to WSS spec, ...
7
votes
2answers
2k views

If I send an email over SSL, will it always be transmitted over SSL?

This is largely a question of how MTAs and different components communicate. I'm curious that if I send an email using SMTP over SSL to my MTA, can it's next jump to the next MTA or MDA be insecure? ...
2
votes
1answer
1k views

Help in understanding a PHP exploit code found on a wordpress application

I've found this code in base 64 on all php files of one of my client's sites (wordpress) and I'm trying to understand what it does. I'm also trying to figure out if it was an application exploit or a ...
5
votes
2answers
3k views

How to store IV and key temporarily but securely

I am using .NET 4.0 to develop a Windows service that will temporarily store encrypted data in a database. The data will be encrypted when it is inserted, then decrypted, processed, and deleted once ...
8
votes
5answers
2k views

How can I remotely wipe the contents of a Linux Laptop if its been stolen?

I am currently investigating using Linux Laptops for my development team. We currently run Windows. The one advantage that keeps coming up for Windows over Linux from a system administration / ...
19
votes
5answers
19k views

Can I detect a MITM attack?

Based on this question here: Are "man in the middle" attacks extremely rare? Is it possible to detect man-in-the-middle attacks, and if so, how would one go about it? In addition, what if ...
7
votes
3answers
1k views

Circumventing Device Fingerprinting

Regarding the concept of device (browser) fingerprinting, would it be possible for the user to spoof fingerprinting data by giving random information such that your fingerprint changes after every ...
120
votes
8answers
13k views

Are “man in the middle” attacks extremely rare?

In "Some thoughts on the iPhone contact list controversy and app security", cdixon blog Chris Dixon makes a statement about web security Many commentators have suggested that a primary security ...
10
votes
4answers
4k views

How do I encrypt the source and destination IP address, along with various parts of an email?

If the subject makes no sense to you, that's fine, it makes no sense to me. I've been tasked with securing emails sent from some devices, and I'm looking for advice on intelligent questions to ask to ...
4
votes
2answers
6k views

Confusing about Ephemeral Diffie-Hellman

1 Does Ephemeral Diffie-Hellman support authentication? Quote from www.rsa.com/products/bsafe/documentation/mesuite21html/dev_guide/group_EPH_DH.html Ephemeral Diffie-Hellman does NOT provide ...
4
votes
4answers
1k views

Database Security Best Practices for E-Commerce Site [duplicate]

Possible Duplicate: Securing an E-commerce site I'm developing an e-commerce site in a LAMP environment. Is it advisable to separate data on to different servers (i.e. to have one server as ...
5
votes
2answers
1k views

How does the encryption of FPGA works?

I know that FPGAS of Altera enables you to encrypt the RTL code while you work with it, what I can't understand is why it is really encrypted since once I have the FPGA, I can take it and with flash ...
14
votes
2answers
2k views

SSL fingerprint inconsistency: what does it mean?

I apologize if this is not the best place to ask my question on the stackexchange network, I couldn't figure out where to get enough attention and be relevant. Facebook provides a SSL host, it can be ...
4
votes
11answers
4k views

Definitely safest password storage scheme?

I already asked this on StackOverflow but I was suggested this would be a better suited place and I found no way to "move" the question so I have to copy it. Believe, I know, there are hundreds ...
3
votes
2answers
455 views

VPN Appliance Placement Options

I'm currently looking to implement a VPN solution (based on a Checkpoint Connectra) purely to provide remote access to staff (no site-to-site, or customer access), but the one design decision I can't ...
4
votes
2answers
715 views

Blackberry QNX / Playbook encryption details

Now that Blackberry received FIPS 140-2 certification for one of it's QNX devices, does anyone have technical specifics on how data is encrypted on both mobile phones or the Playbook tablet? I'm ...
3
votes
2answers
1k views

The point of PCI 1.3.1 through 1.3.3

In expansion to my previous question what qualifies as public access? I'm trying to wrap my head around the intent of the points 1.3.1 and 1.3.2 and 1.3.3 of the PCI standard. I have four DMZs at my ...
7
votes
5answers
898 views

How should I serve untrusted / unsanitized documents (PDF, DOC, XLS) to end users over the web?

My website will be hosting documents for end users and I would like to make this as secure as possible. Question Assuming that I have a need to share documents on a website that may contain hostile ...
6
votes
2answers
3k views

C# Image.FromStream is that secure?

after reading the data from the request as Stream i needed to convert it to Image so i used this Method: Stream inputStream = HttpContext.Current.Request.InputStream; Image img = ...
1
vote
1answer
6k views

Will JavaScript be executed which is in an HREF?

I located an issue with a site where I can insert a script tag into the href of an anchor tag: <a href="<script>alert(8007)</script>">Click Me</a> What I am trying to ...
6
votes
4answers
531 views

“There's a firewall on the router into the building so you can turn the one on your computer off”

I know some people that, in regards to network security, argue that because the firewall on the router into the building is on, that makes the network secure and therefore, the firewall on Windows ...
4
votes
1answer
520 views

Can UNIX Domain Sockets be locked by user ID?

If I created a folder /tmp/me with permissions 700, and started a process under me that starts a listen socket under /tmp/me/socket. I currently assume that a connection to that socket originated ...
4
votes
3answers
520 views

Security for home server, wiki

I recently set up my own home server, running Ubuntu linux. The intent I'm having for this is to have a private wiki for my family, so we can have a place to collect information like phone numbers, ...
2
votes
1answer
379 views

Does iOS use built-in certificates to authenticate peers when using ipsec VPNs?

Suppose I am setting up an IPsec VPN for Apple iOS clients with the requirement that the iOS clients need to know that the server is legitimate and vice-versa. I create a root CA and issue a ...
8
votes
2answers
185 views

Cloud-specific standards and regulations

Not specific to any particular industry or requirements, but in general - are there currently commonly accepted standards regarding cloud-based applications? I* am developing a system that will be ...
3
votes
1answer
349 views

Could somebody explain connect loop DoS?

I'm trying to understand this vulnerability. How can I reproduce this?
7
votes
2answers
257 views

Should I store my intellectual property / code online?

As a hosting company we have gathered a busload of information over the years that are pretty much confidential. This information includes code, graphics, ERD diagrams, SEO strategies and so much ...
3
votes
5answers
470 views

Securing data transfer between public network and personal accounts

I would be traveling soon and I am looking for all kinds of ways to encrypt the data transfer (usernames, passwords, emails ...) between the new networks to which I will connect my Laptop, that is ...
1
vote
3answers
197 views

Information Security standards in corporations

I'm developing a web based application. I want to create it so that it could be adopted by teams within corporations and large organisations that have tight IS standards. The initial organisations ...
3
votes
2answers
879 views

Efficient and simple way of securing home pc with hardware token

I am looking for a simple but reasonably safe way to secure my home pc (and laptop, nas, etc.) with a hardware token. I would like the system to be secure, but practical enough to be used on a day to ...
1
vote
3answers
1k views

How to find the OS of the target machine

I am new to this field. Currently I am using Linux OS and my question is how can I find the OS of another machine to which I do not have a direct access. I am interested in any possibilities which ...
6
votes
2answers
235 views

What to consider when generating random code as part of two-factor authentication?

I want to write a patch for a two factor authentication system that someone else has started. The code is a module for a PHP content management system and sends an SMS message to a user's phone, after ...
4
votes
2answers
1k views

Code Injection detection on Web Servers

Recently I found one of my web servers hacked with malicious code injected to websites hosted there. It wasn't exactly my fault, as I shared the server with other people and someone put some unsafe ...
3
votes
1answer
124 views

How and where to begin on the Return of Web Application Security Investment?

While there is a vast trove of vulnerabilties, threats and their corresponding countermeasures, the amount of information on Infosec Economics (Specifically for web applications) seems scarce. What ...
84
votes
7answers
4k views

Is social-engineering an actual threat

I've recently finished book The Art of Deception: Controlling the Human Element of Security by Kevin Mitnick The book was released on 4th December 2002. Not talking only about techniques described ...

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