2
votes
1answer
1k views

File upload vulnerability: rename solution?

I have a module in which the user can upload images. I searched Google for different kinds of upload attacks checking dimension of the image (still vulnerable) checking of file extension ...
1
vote
1answer
118 views

Determing and deciphering an encrypted drive (knowing the password)

I have a Western Digital external drive (my passport essential 500GB), which comes with a little software that allows you to encrypt your data (which I did sometime ago). Unfortunately, this software ...
6
votes
1answer
7k views

Which security risks are associated with alternative DNS providers?

I'm considering using an alternative DNS provider on my computer. Which risks do I run if I use one? I already know that the DNS provider may return a malicious IP address when I'm trying to access ...
3
votes
2answers
1k views

Possible implementations of networked+encrypted filesystem

Is it possible to implement scheme where remote server just share its filesystem (or resizable container file in it) and it's locally encrypted and mounted? And what is best practical method? (On ...
2
votes
1answer
579 views

Can I encrypt a file incrementally?

Is there any way to encrypt a file incrementally? The problem is that I receive a file a chunk at a time via Internet (it's a client-server application and I send byte arrays via a WCF service) and I ...
33
votes
4answers
5k views

What alternatives are there to the existing Certificate Authority system for SSL?

Whilst the current CA system works very well for a lot of people, it does put a lot of power into individual CAs' hands, and makes a CA hack potentially devastating for customers and business. What ...
12
votes
7answers
3k views

Should we force user to HTTPS on website?

Should we force website from HTTP to HTTPS , one of the method is using .htaccess: RewriteCond %{SERVER_PORT} 80 RewriteRule ^(.*)$ https://www.example.com/$1 [R,L] But what I notice is that some ...
2
votes
1answer
1k views

What would be the scenario if P = NP for RSA algorithm?

Suppose I am using RSA for my security system. Now someone discovers find a polynomial time algorithm for RSA. Then what measure should one that such that RSA never breaks. Maybe large number of used ...
6
votes
1answer
1k views

What is HiASLR?

I have been hearing this word the whole day long. Can any one give me a brief intro? How does it differ from ASLR?
1
vote
2answers
281 views

anti virus acting up/DNS poisoning

I was running my desktop and the AV deleted a file that it said was a virus (this was not during a scan, just normal usage). Now I'm just browsing the web and I got a couple of DNS poisoning attacks ...
1
vote
2answers
2k views

How to check if a port can be accessed from the outside

I want to be sure that the firewall protecting the intranet is effectively rejecting/granting access to a port. I have no access to the firewall nor any other external machine. Is that possible at ...
20
votes
2answers
12k views

Strength of WEP, WPA and WPA 2 PSK

I know there are three method for wifi security. What are the relative strengths of the password encryption in WEP, WPA and WPA2 PSK?
1
vote
1answer
93 views

sigsegv in php5.3.10

I found an overflow situation in php5.3.10. Probably it's not 'something new', but if I can understand this, it will help me to find this kind of bug faster in the future. What can I do to check ...
2
votes
3answers
3k views

DDoS on LAN: How to Defend?

DDos on a wired network has to be extremely rare, since the intruder has to be physically connected to the network. However, let's say that it still managed to happen. How would you be able to defend ...
3
votes
2answers
2k views

How to correctly secure a ssh session against MITM attack?

How do you improve the security of your ssh session against a man-in-the-middle attack?
2
votes
1answer
988 views

Replaying SSL traffic in an active connection [duplicate]

Possible Duplicate: Are SSL encrypted requests vulnerable to Replay Attacks? I have an SSL connection with my bank open from A to B A -> B Through that connection I transfer $100 to ...
2
votes
3answers
2k views

Potential consequences of using “Everyone” to manage permissions?

If a web application is set to run using a specific account, could a malicious user do something they shouldn't if I use the "Everyone" account to manage permissions on a folder on the server? The ...
2
votes
2answers
590 views

Attacks surrounding /etc/hosts/

Although /etc/hosts/ is a file that comes up a lot in security, I am surprised to find there is no discussion here on this forum that describes how this can be used for an attack. Thinking about it, ...
0
votes
2answers
584 views

Bypassing Trusted Computing

I have not been able to find any information about trusted computing on the Internet. I am reasonably sure that its software manifestation can be bypassed by a Linux live disk, but what about hardware ...
54
votes
12answers
3k views

How do you log in from an unsecured computer?

Suppose that you are on a cybercafe, at a friend's home or at your work office, and you need to log in on a site, but you feel that the the computer can not be trusted (e.g. your friend isn't ...
1
vote
0answers
168 views

Finding pre-image of MD5 hash [closed]

I have the following requirement for hashing using MD5. H(A,B,C,X); Where values A,B & C are given. However X is not given. I would like to find out what value of X would give a hash beginning ...
3
votes
2answers
505 views

Which ports are potential security risks for nmap?

I'm using nmap and I am having trouble finding which ports are dangerous and pose the greatest security risks. Which ports are potential security risks for nmap? I was thinking samba, telnet, vnc ...
19
votes
3answers
822 views

Should Stack Exchange be more obscure in its systems' structure?

I've noticed that Stack Exchange always reveals the detailed structure of its servers and systems (see these blog posts). And also the exact results of their tests and points of weakness (see the old ...
5
votes
2answers
4k views

When using symmetric key encryption, do we need to sign?

Say we're using a shared key between two parties, that has been distributed using public key encryption, is it still necessary to sign any data that's encrypted using the shared key? Or is it enough ...
2
votes
2answers
2k views

Security analysis tools for iOS 6 [closed]

Searched over web, however could not find much info on security analysis tools for iOS6. Can somebody point me to the security analysis (Static Code Analysis & Pen Testing) tools for iOS6?
18
votes
3answers
14k views

Authenticating a Proxy server over HTTPS

When browsing to a website over HTTPS, the web browser typically does a lot of work in the background - negotiating a secure channel, validating the site's certificate, verifying the trust chain, etc. ...
1
vote
4answers
207 views

Infection I can't shut down, disguises process as scvhost.exe [closed]

A little while ago my home machine got hit and I was able to clean out just about everything except this one process. I can't find the origin but it shows in my process manager as scvhost.net by the ...
2
votes
4answers
2k views

IPSec VPNs and symmetric keys

When dealing with IPSec based VPNs, I understand that there is a slight "problem" with symmetric key exchange. Obviously, you can't send the keys over the VPN, since they are used to guarantee the ...
10
votes
4answers
2k views

Possible to prevent Juice Jacking by only connecting USB pins 1 & 4?

According to this accepted answer, there is no phone on the market today that is immune from "Juice Jacking"*. I think an easy way to mitigate this threat is to have a filter that blocks USB pins 2 ...
-4
votes
1answer
124 views

How to distribute public keys in the network without losing its credibility? [closed]

How to solve the key distribution encrypted with the public key? How to make public key authentication? How to distribute public keys in the network without losing its credibility?
2
votes
1answer
232 views

What user information does Wikipedia retain when a page is viewed?

People worry about privacy issues of Facebook and Google, but Wikipedia, being the nice and not-for-profit guys that they really are, does not receive much attention. However, if access logs are not ...
1
vote
2answers
1k views

authorization vs federation vs entitlement

I am vague among the three following terms: authorization, federation, entitlement (as stated by the OpenAM product: OpenAM provides open source Authentication, Authorization, Entitlement and ...
-2
votes
1answer
255 views

Digest authentication - client side [duplicate]

Possible Duplicate: Client side password hashing How one design support for digest authentication in client side. HTML form probably won't help. Does one need javascript and set the header ...
5
votes
3answers
286 views

What are the security implications of allowing unlimited size cookies?

Our application firewall blocks requests if it detects a cookie is present with a value greater than 1024 characters in size. Are there any exploits involving large cookies? i.e. How much more ...
7
votes
2answers
1k views

Drupal filters XSS with regexes. What could bypass it?

Drupal filters HTML strings against XSS attacks using regexes: http://api.drupal.org/api/drupal/includes%21common.inc/function/filter_xss/7 However, as a lot of people know, HTML can't be parsed with ...
2
votes
1answer
659 views

VMware Workstation 9 Security Best Practice Guides

Could someone please be able point me in the direction of where I could find some best practice security guides for VMware Workstation 9 please? I've searched the VMware site and to say it's badly ...
25
votes
15answers
9k views

How to block or detect user setting up their own personal wifi AP in our LAN?

Recently, I found a user plug a USB Wifi stick on his desktop, and set up an AP without password. How can we detect or block this via firewall rules or other approach?
5
votes
1answer
425 views

Cufon or Prototype as an attack vector for Blackhole exploit kit?

I've been asked to look into the security of a client site that's apparently throwing antiviral messages when visited. Specifics: It's being detected as a Blackhole exploit kit inside of a Cufon ...
-1
votes
3answers
205 views

Activity's history to suspect an intrusion

I was hacked one month ago - a person who borrowed my device installed a key logger. Now, I have a new issue, sometimes when I open my computer in the morning, it is totally low battery, though it ...
4
votes
1answer
424 views

Accurately mapping networks for purposes of pentesting

I always love staring at those network topology diagrams you see posted up in schools and online. Obviously if you physically setup and configured everything, plotting out servers, subnets, routers ...
3
votes
1answer
329 views

Is there a better way to take advantage of current 'approved', 'proven', and memory/cpu-expensive algorithms while using salts and peppers?

I've read about the concepts presented in these two questions: Pre-hash password before applying bcrypt to avoid restricting password length Would it make sense to use Bcrypt and PBKDF2 together? I ...
1
vote
1answer
794 views

Different Security Issues Depending on OS? [closed]

I'm interested in learning more about OS specific security issues if there are any. I'm very new to this topic but I want to learn more about if there are specific security vulnerabilities associated ...
6
votes
1answer
835 views

Android and AES side channel attacks

I am working on a project that will involve symmetric AES 128 bit encrypted communication between an Android application and a bluetooth device. Are there any public AES libraries available for ...
4
votes
1answer
117 views

Is there such thing as a smart phone with auto-forget password feature?

Storing passwords to external services (e.g. corporate email servers) on smart phones is very insecure, since phones are more easily stolen. Has any vendor implemented a feature to only cache a ...
6
votes
1answer
2k views

Practices for storing username/password in Web applications

I have read the following question: Storing password in Java application but I don't find the answers useful for my case. So here is my question somehow related to that. I have a Java Web application ...
4
votes
1answer
1k views

Compatibility between OpenSSL 0.9.8r and OpenSSL FIPS Object Module v1.2?

I have a private key in PEM format that was generated by OpenSSL FIPS Object Module v1.2 using a proprietary third party tool (that I cannot avoid using). This third party tool encrypted the private ...
0
votes
1answer
1k views

How to escape user input in a value of javascript object?

How to properly escape user-controlled input when it's inserted as a value in JSON object? <script> $(document).ready(function() { new MyObject({ key1: "user_input", key2: ...
2
votes
2answers
2k views

Use HTTP POST for Google Search queries

When searching on Google from a browser, the actual search query is visible in the address bar of the browser, even when using Google's secure search (https). Is there a way to submit the search query ...
0
votes
1answer
110 views

Credentials using AWS IAM

I have a server, which should provide temporary credentials to the client. The credentials will be transmitted using HTTPS. The client should be able to upload S3 files, as well as download them. The ...
3
votes
2answers
138 views

Local Network Data Sync and Access Log

We have some confidential data for our research. Currently, we use an encrypted hard drive for storing the data and any researcher using the data takes it off the drive. However, we do not have any ...

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