1
vote
1answer
233 views

Blocking direct access to ajax source

I made a calculator. I want to prevent that people can use the ajax.php to get the results without accessing the webpage. They have to use the API for that purpose. I suppose I can add a key ...
5
votes
3answers
183 views

How to best present 'Security Vulnerability Feedback' to devs in the IDE (like VisualStudio)

I posted today a pretty cool PoC where I was able to provide real-time 'security vulnerability feedback' to a developer as he is writing code in VisualStudio. You can see the video at Real-time ...
1
vote
2answers
133 views

Can a biometric device serve as a user based entropy source?

I am wondering if a biometric device can be used to generate some entropy or key material that would be stable across each authentication. The contrary would be for biometric devices to act like an ...
3
votes
2answers
490 views

Risks of serving untrusted content under HTTP Content-Type: text/plain?

Am I gonna run into XSS attacks by doing this, or will a file download be prompted? Are there security problems that would rise in a modern browser?
1
vote
1answer
267 views

Is Oracle gathering information from my machine when I download Virtualbox or Netbeans?

When we try to download Netbeans or Virtualbox from the Oracle/Sun site, our firewall warns us that some suite called EdgeSuite tries to obtain information from our machines. I don't know what ...
5
votes
2answers
8k views

Is NAT Loopback on my router a security problem?

Some DSL routers prevent NAT loopback. Security is sometimes cited as the reason. Is NAT loopback really a security issue? And if so, how is this exploited? NAT loopback... where a machine on the LAN ...
2
votes
3answers
1k views

Why would you do a password audit

I was thinking last night after reading an article about pen testing and security audits, why would you get a list of all the passwords for the company you are auditing and put them through a piece of ...
1
vote
3answers
2k views

Tracing an IP from a mobile broadband ISP

My honeypot caught a hack attempt from an IP that was issued by Three Mobile Broadband (UK). My immediate thought was that most probable explanation was that the user was in the UK and had his ...
6
votes
3answers
598 views

Are online hash calculators dangerous?

I was about to use an online MD5 checksum calculator when I realized that my result could be added to a database. This is significant because the string I was going to type in was my bank password. ...
5
votes
3answers
590 views

How should I choose a difficulty factor for my password hashing function?

Assuming that I'm doing password hashing properly and using bcrypt, scrypt or PBKDF2, how should I go about choosing an appropriate difficulty factor? i.e rounds for bcrypt, iterations for PBKDF2 and ...
14
votes
3answers
4k views

Can someone get my WPA2 password with honeypots?

Yesterday I went to my cousin's home and I saw that I'm not connected to his wireless (for internet access). Then I have looked up the list of wireless points. I have found his name and clicked it ...
1
vote
2answers
222 views

Securing a VPN connection

I'm new to this we want to install a new VPN connection that will be used to connect using Internet to some networks in the office the contractor want to use a" Cisco NAC Network Module or Cisco IPS ...
2
votes
4answers
340 views

Fingerprinting Hash Function

For the purpose of fingerprinting data with the least chance of collision will combining the length (as a 32 bit unsigned integer stored in addition to the hash) of the input data and/or sampling a ...
1
vote
1answer
596 views

Smart card compatible with Schlumberger (Gemalto) Cryptoflex 16K and USB reader

Another question related to previous ones A SW system constructed with Microsoft CNG can be FIPS 140-2 Level 2 Compliant? and About performance of Smard card for performing 3DES in a MD5 hash We need ...
1
vote
1answer
315 views

About performance of Smart card for performing 3DES in a MD5 hash

Another question related to previous, unanswered A SW system constructed with Microsoft CNG can be FIPS 140-2 Level 2 Compliant? Another alternative is to store the keys in a Smart card permanently ...
3
votes
4answers
2k views

Determining the point of compromise on an infected web server?

Recently a friend of mine has had his web server compromised - all PHP files were injected with malicious code, in particular one that looks to be called "GetMama". If I look this up, it seems that ...
20
votes
5answers
741 views

Hashed password storage with random salt

Ever since I've been making sites that require a user to log in with a username and password I've always kept the passwords somewhat secure by storing them in my database hashed with a salt phrase. ...
1
vote
1answer
98 views

How to detect suspicious tokens collected by a hacker

I previously asked a question here What's the use of adding a challenge in the otp algorithm? Let's suppose that a hacker has succeeded to collect tokens. Is there a way to detect suspicious ...
2
votes
1answer
415 views

Is using decrypt_derived more secure than a keyfile?

Say I have two partitions on a Linux system, a root partition (/) and a /home partition. Both of them are encrypted with LUKS. The /home partition needs only to be decrypted if / is unlocked and ...
6
votes
2answers
1k views

How can end-users detect malicious attempts at SSL spoofing when the network already has an authorized SSL proxy?

I'm working on one client's network where they have enabled HTTPS authority spoofing on their proxy. This allows them to effectively perform a man-in-the-middle attack to decipher all outgoing ...
4
votes
2answers
387 views

Are sandboxes overrated?

I've stumbled upon the following on the blog of the NoScript developer Giorgio Maone. First, he quotes the following ArsTechnica article about an XSS bug in Adobe Flash: As useful as sandboxes ...
4
votes
4answers
378 views

Malware that uses http as a covert channel

I'm working on a http traffic analyzer and I need a collection of malware, which uses http as a way to get commands and respond, to analyze their network behaviour. Is there any database of malware, ...
0
votes
1answer
223 views

Which software scans software for potential vulnerabilities?

Is there any kind of parser-software-analysis tool that will analyze c code and outputs possible vulnerabilities like buffer oveflows?
1
vote
4answers
271 views

Learn about network and security for securing a server

I'm setting up an OpenBSD server that I want to connect to the Internet (it's going to be used to host a site - so, with Apache, SQLite and the like). I want it to be as secure as possible. Social ...
-2
votes
1answer
187 views

What is the interest of Reverse Proxy? [closed]

I have read many explanations on reverse proxy I still don't understand the interest. Could someone really explains in plain english
0
votes
1answer
218 views

Differentiate normal flow and broadcast attacks

How do you identify whether a broadcast traffic is normal or is considered an attack such as a DoS attack?, There is some information that the plot or the source that allows me to differentiate ...
1
vote
3answers
390 views

Client side scripts through proxies

If you're trying to hide your IP address using VPN/proxies can a website using client side scripting record your real ip? If yes is there any alternative to blocking all scripts as that breaks ...
4
votes
1answer
58 views

Are viewable permissions an issue?

Is it, generally, considered to be a security issue if a user in 3-tier application has read-only access to other users' permissions? I.e. Alice can see that Bob has or has not access to some ...
19
votes
8answers
19k views

How does Google Maps know where I am, when I'm using a VPN?

How does Google Maps determine my location? I've gotten some understanding of Google Maps' geolocation methods from here: http://friendlybit.com/js/geolocation-and-google-maps/ In the newer ...
7
votes
1answer
5k views

Does Google Chrome protect against cross site scripting (XSS)?

In Firefox I've been using the NoScript extension to protect myself from certain kinds of malware attacks. NoScript is well known as a very powerful extension for Firefox and introduced protection ...
3
votes
3answers
1k views

Is a company website secure against sslstrip if it doesn't use ssl on homepage but ssl everywhere else?

Most ecommerce websites use SSL/TLS when you want to log. But most have homepage using http only. Is it enough to have SSL/TLS on login page and logged page to prevent sslstrip ?
0
votes
3answers
578 views

Proxy Server options for school administrators [closed]

I want to set up a proxy server for a school to prevent users to log-in to site like Facebook, Youtube, etc. I have no idea how to do this, so I´d really appreciate your help.
7
votes
4answers
797 views

Alternative to “web of trust”

Let's say I have an SMIME platform where I want to easily establish trust across the entire world for a particular purpose, for example for sharing valid financial information. I think that a ...
14
votes
3answers
1k views

How secure is Microsoft-mandated UEFI Secure Boot, really?

I've read a few articles recently about the UEFI Secure Boot feature, and how Microsoft will be requiring it to be enabled by default on all Windows 8 certified x86 systems. In theory, it sounds like ...
3
votes
3answers
306 views

What pros and cons are there to a one-time random salt between client and server?

In researching on best practices in hashing passwords using a salt I came across a presentation on slideshare. The approach outlined is as follows Client requests login page Server-side code ...
2
votes
4answers
608 views

Should links to images contained in emails be secure?

We are generating emails which contain links to images: our client's branding, images showing other products offered by the client etc... What are the security pitfalls if these links in the emails ...
3
votes
2answers
1k views

How to use RC4 securely

I want to encrypt my network communications with RC4. The reason for choosing RC4 is the simple implementation and speed. I need to have a pure Python implementation, because I cannot compile for my ...
2
votes
1answer
471 views

Intepreting PE (Portable Executable) headers of suspicious malware files

I am starting up on malware analysis, and I am analyzing a file to see if it is packed or obfuscated. Using PEview I am examining the .text, .rdata and .data headers. I know that if there is a big ...
0
votes
0answers
35 views

more justification for the impact scores used by the national vulnerability database [duplicate]

Possible Duplicate: why CVSS give a score of 0.66 for a full impact on CIA? Good day ; the CVSS attributes the following impact values ​​for confidentiality, integrity and availability: ...
1
vote
1answer
82 views

How many connections can TCP_WRAPPERS handle?

As we know that TCP_WRAPPERS is a good way of security on linux/unix system, to disallow or allow remote user to connect to the specific services. Assume that if there have a large number of ...
-4
votes
1answer
2k views

efficient 16 bit hash [closed]

I'm looking for a way to make a 16bit ID out of approx 100 bits of data. The solution should be easy to implement, or should already be implemented in c++, should be quick to evaluate, and most ...
3
votes
2answers
350 views

A SW system constructed with Microsoft CNG can be FIPS 140-2 Level 2 Compliant?

We have to design and construct a system that signs files with sensible data, like evidences/proofs. The sign process is simple, basically calculate MD5 of the file content and encrypt the MD5 result ...
1
vote
3answers
266 views

Mass account lockout prevention using CSRF tokens

I'm currently working on reducing the risk of mass account lockout on a site that (unfortunately) issues sequential, numeric user IDs. Changing the structure of the userID is not an option at this ...
1
vote
1answer
1k views

proxy services for torrents vs encrypting data

I've noticed growing popularity in proxy services for torrent clients; such as BTGuard. Most torrent clients encrypt traffic so aren't these services pointless? I read that it's because the encryption ...
17
votes
1answer
3k views

Is there a standard for printing a public key as a barcode?

Is there a standard for storing a public key printed on paper? Say, I want to hand out business cards with my public key pre-printed on them at a key signing party to help build the web of trust. My ...
3
votes
3answers
2k views

Why doesn't the same origin policy block get requests what contain arguments?

From what I understand, the same origin policy prevents scripts in a web page from talking to servers outside of the present domain (using post, xmlhttprequest, etc). I assumed that get requests ...
3
votes
2answers
187 views

What value security wise, if any, does a digital handwritten signature have?

Here's an example of what I mean: (It's basically the same thing as a traditional signature.) Given I've never seen someone fail this control, it's unclear to me what real security such a system ...
2
votes
1answer
1k views

How does knockd work?

It's rather easy to configure knockd for ex.: on an Ubuntu server's (10.04) sshd: ======================================================================== 0) # install knockd on the SERVER side ...
3
votes
2answers
778 views

Is it possible to forge post request and bypass maxlength in input box?

I have input box with maxlength=12, and that input box is vulnerable to xss. But because of maxlength 12 it is not possible to construct any really valid xss vector. The user input is stored in the ...
2
votes
3answers
166 views

Are my credentials unsafe if I am already logged-in before connecting to a public network?

Let's say I am already logged-in to my Gmail or Yahoo account using my 3G then I switched to a public WIFI in an airport or cafe. Is my username and password still vulnerable? What others kinds of ...

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