6
votes
1answer
574 views

Safest way to keep an offline bitcoin wallet

Keeping a large amount of bitcoins in an online computer is dangerous. The bitcoin wallet is merely a file, and once the file has been copied the bitcoins can be transferred to another account. ...
3
votes
4answers
173 views

Generate DB Password from license key - a good idea?

There's this web app which has a SQLServer database, and the connection string it uses to access the database is not stored in any configuration file. Rather, the designers decided it would be a good ...
-5
votes
2answers
527 views

PHP injection on 777 file [closed]

Some one has modified a PHP file, which had permissions set to 777, on my VPS server. How can someone do that without administrative access to the server? What information I can give you? I know ...
1
vote
1answer
97 views

How can be detected connection throttling in response to portscan detection?

Imagine that I have to pentest a server that implements portscan detection based on the number of packets received to different ports in a time interval. I don't know that the server is implementing ...
1
vote
4answers
290 views

Tracking a user who has posted abusive messages

A visitor to our site has posted abusive messages and I wish to block them but I'm not sure there's much I can do besides blocking their IP address (and even that won't help much). After analysing ...
21
votes
4answers
11k views

Demystifying Web Authentication (Stateless Session Cookies)

I'm currently researching user authentication protocols for a website I'm developing. I would like to create an authentication cookie so users can stay logged in between pages. Here is my first ...
-1
votes
1answer
256 views

How to prevent code injection like automatically adding extra character? [closed]

Code: $result = "Hello World"; $jsonEncodeValue = $result; echo $jsonEncodedValue; Assumed Output: "Hello World" Real Output: \n"Hello World" This \n Line Feed added automatically. For this ...
3
votes
3answers
3k views

Email hacking myth

I never believed that some one can actually hack an email that easy. If someone hacks an email it means he actually hacked the server and he will gain access to many emails not to mine only. Anyway ...
0
votes
1answer
75 views

Situations that a firewall should use rule for all packets

When should a "match all packets" rule be used (instead of chain policy)? I think that this should be used in real time applications like audio streaming or video broadcasting. Are there other ...
1
vote
2answers
763 views

Secure against HTTP FLOOD ATTACK

What is the best way to defend your web site against HTTP FLOOD POST/GET ATTACK ?
3
votes
5answers
2k views

Strange android app … possibly a mass malware?

I started receiving on my android Samsung Galaxy note strange notifications in Mandarin (the language of the people of china). Once I click on the notification it opens my browser with a blank page ...
1
vote
1answer
106 views

Error using ncrack

I am trying to run a ncrack command of the following format: ncrack -P filePath1 filePath2 --user user1, user2, user3 ipAddress:port and I get the following error; Does anybody know why I'm ...
0
votes
1answer
108 views

Auto encrypt chunks of content for backup, best practice?

I'm just curious and it's more like a mind game, I'm not into cryptography. How would one encrypt data that's constantly generated? Put the data automaticly into chunks encrypt the chunk and send it ...
-1
votes
1answer
237 views

A simple but dangerous vulnerability in windows7?

I discovered that if you change the extension of any file to .lnk, that is make it like a shortcut file, then you can't change the extension again, even if you have set 'show the file extension names' ...
-3
votes
2answers
517 views

Good Practice: Storing Passwords in general

I've got a totally theoretical question to you on today - what is the "best" practice for storing passwords? [Best in terms of security and performance] Usually, especially PHP-Developers tend to ...
4
votes
3answers
5k views

How do you detect load balancing?

Scenario You need to PenTest XYZ.com. You expect, because it is a high traffic site, that multiple servers are being used with a load balancer. Question Aside from pulling the MACs (which are ...
3
votes
2answers
2k views

Why doesn't Microsoft implement salt on users passwords in Windows?

Pretty straightforward - So we use rainbow tables to get passwords of users out of hashes. So why won't Microsoft implement salt on the passwords in Windows to be hash(password+salt)? Won't this ...
2
votes
6answers
293 views

Protecting an admin area from the public

We are about a month away from launching a pretty important site, which comes with an admin console to help us manage the site. Now I'm not very interested at just leaving the admin out in the open ...
1
vote
1answer
230 views

Packet-filtering firewall evasion (Scanning)

Context I'm very familiar with different applications of scanning tools (. . . and you can use -mtu to specify the size of the fragments in nmap . . .) but every piece of information I read about ...
2
votes
3answers
189 views

Authentication system against the user

I try to search articles on the internet in this category, but no result. In generally we use authentication of the user against the system. So, we want to authenticate the user before he\she use our ...
3
votes
2answers
327 views

How content-type:image can lead to infected JAR file?

Symantec published a news about a malvertising campaign targeting IE users with Java exploits (already known vulnerabilities). At some point they explain that the users are redirected on malicious ...
1
vote
1answer
301 views

Os command injection privileges

I have a question about privileges when performing an Operating system command injection. If an attacker succeeds in getting a reverse shell on a remote server through netcat (netcat -v -e ...
3
votes
3answers
2k views

Is there is a way to lock my USB port over the device physically?

Is there is a way to lock my USB port over the device physically ? For example I am connecting the USB mouse and keyboard on an public computer but I do not want anyone to remove them physically. I ...
1
vote
0answers
39 views

Database hash for password field [duplicate]

I'm using a mysql database and am looking for a cryptographic hash method for a password with salt added to it. What would be the best hash method for this problem?
1
vote
2answers
146 views

Need a time consuming symmetric encryption

I have a database with millions of entries, each entry encrypted with a (different) password. Normally, only one entry is needed at a time. If somebody steals the database, I want to make it hard for ...
2
votes
1answer
581 views

Proxy server and IP address blockade

i am in china. so i use web freer to use blocked sites like face book and you tube. we use broadband connection provided by our university. some times the server goes too down and we can not use ...
3
votes
2answers
248 views

Securing Time Sensitive Data

I have a number of time sensitive, embargoed pieces of information that I need to distribute over the Internet and have received at a precise time. I'm currently dealing with the problem by uploading ...
11
votes
1answer
14k views

Brute Forcing Password to a Truecrypt-encrypted file with Partial Knowledge

A while back, I encrypted a few files with Truecrypt, and stored the password in my head. Now I need to access it again, the password isn't working. I'm sure most of it is right, but I'm off by one or ...
2
votes
1answer
796 views

sha-512 vs sha-3? [duplicate]

Does the new SHA-3 Keccak hashing algorithm offer any benefits from SHA-512? "Even worse, none of the SHA-3 candidates is significantly better. When SHA-3 is announced, I'm going to recommend that, ...
2
votes
2answers
3k views

What is more risky? Database Server in DMZ or Trusted Network?

Hoping this is not a dupe of any of the related database / DMZ questions, but I don't think any of them answered my question sufficiently. Assume the following A web server is being used for ...
3
votes
1answer
480 views

How to debug/reverse engineer java applets?

I need to analyze a java application (a .jar file) for a war game. I know java can be decompiled, but the coder apparently did a lot of obfuscation to prevent the reverse engineers from understanding ...
1
vote
4answers
1k views

My website has been hacked, what do i do next? [closed]

So. I couldn't see any other question like this on Sec.Se so i thought i'd ask. My public website www.foo.com has been hacked. The front page is sending it to be redirected to seoblog.fooblog.com in ...
1
vote
1answer
327 views

What is the fight-back mechanism in OSPF?

I want to know more about the fight-back security mechanism in OSPF routing protocol. When is the mechanism activated and how does it work? I found the source description of OSPF fight-back, but the ...
3
votes
2answers
3k views

Protecting against SSL Strip [duplicate]

I've read you can attack connections using tools like sslstrip, if you are on the same network. So what ensures that our SSL connections remain safe? Does it depend on the cert strength? Do you ...
5
votes
3answers
279 views

What is a reasonable expiry for user authentication certificates?

This question is about a nearly decentralized P2P system with a centralized certificate authority where users can authenticate and receive a certificate on their public key and then can authenticate ...
4
votes
1answer
374 views

For a desktop application, why use an SSL certificate from a trusted authority?

When a web browser connects to a server and downloads an SSL certificate, a third-party trusted authority ensures that the client is talking to the host that it's looking for. If the host uses a ...
17
votes
7answers
804 views

How to deal with a person who gets easily fooled by internet and mail scams?

alternative title: How to deal with a person who has gotten paranoid and doesn't want to go online anymore? A person, who has over the years been scammed many times, by bad spam/fraud emails, and ...
11
votes
1answer
4k views

Android Runtime Code Injection

I'm doing research for a static analysis tool to help detect malware in Android applications. I'm wondering if it is possible to perform code injection on Android without using a class loader. I ...
5
votes
4answers
163 views

How to avoid to lose data encrypted because it was encrypted by no longer supported software?

How can I avoid losing data that is encrypted using methods that may become obsolete? I have valuable family records I wish to secure, so I plan to encrypt them before putting them in long-term ...
9
votes
6answers
761 views

Does not having https moot this entire site?

On a bank website the other day, I noticed that they were giving out a phone number on a page that wasn't over https. This seemed really wrong to me, since it would allow somebody to change the phone ...
2
votes
1answer
1k views

Using John the Ripper to crack SHA hash w/ partial knowledge

Group, I have a SHA1 hash that I would like to brute-force. I have knowledge of several characters before and after the password (ie, if the hash is derived from "xxxpasswordyyy", I know both xxx and ...
-1
votes
1answer
160 views

setting up website for logged in users, anyone, and files no one should see (via the web) [closed]

I asked how to prevent not logged in users from seeing certain content but the solution I chose to implement encountered a problem. I chose to make my root directory for the server C:\WAMP\www\public ...
4
votes
3answers
285 views

February 7th 2013 Facebook integration error implications [duplicate]

What are the security, privacy, and overall availability implications of the Facebook event (link) yesterday? I was astonished to see site after site being redirected to a Facebook error page last ...
1
vote
1answer
287 views

Is it safe to use flex and bison as a protocol parser?

I started writing a a simple protocol lexer and parser for STOMP using flex and bison. Does anyone know of any security issues that might result from this? Edit: Added code. %{ /* Tokenizer for ...
0
votes
1answer
289 views

Does S/MIME provide means to propagate a certificate's revocation?

Can a revocation certificate for an old X.509 certificate be attached to an email in addition to a replacement certificate in such a way that the client user does not have to manually intervene? Or ...
1
vote
3answers
161 views

What is required to ensure users' information being sent over my website is secure with the use of account log ins

I have inherited the responsibility of managing my company's website. There are some customers who are required to submit highly confidential information via the website using online forms. I have ...
2
votes
1answer
318 views

Credit card data - sharing and storage [duplicate]

What is the industry standard for sharing credit card data between client (thin & thick) and server?
0
votes
2answers
565 views

OpenID without SSL certificate

Is it wise to use OpenID (from Google or Yahoo) to log-into a website instead of a username+password login if that website doesn't have an SSL certificate installed? Just to make things clear, ...
6
votes
1answer
667 views

Prevent cross domain form submission with nonce?

I haven't done much in web security before but am now in need to prevent a form from being submitted from anything but my own domain. I know how to lock this down in an .htaccess file but the ...
4
votes
2answers
157 views

Security implications of storing email attachments on Centos Server

There is an application I am working on which requires processing the incoming mails to cs@company.com. The company.com mail accounts are being run via Google Apps for Business. So I fetch the ...

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