0
votes
1answer
509 views

Is it dangerous to serve executable cgi files in public folder?

In the past, Apache used to serve cgi files from cgi-bin folder only, and it was always advised to avoid putting executable files in public folders. However, today's webservers fairly serve executable ...
1
vote
1answer
3k views

wireshark only showing inbound traffic

I am using a dynex DX-EHB4 ethernet hub with two systems connected to it, the target desktop and another desktop running wireshark in promiscuous mode. I have a filter in place "host x.x.x.x" so I ...
5
votes
1answer
1k views

Can a Bitlocker To Go user pin be brute forced?

I have a external hard disk and protected a partition on it with Bitlocker To Go. I printed the recovery code but I lost it. I can't remember the user PIN either. If I could only know the first ...
2
votes
1answer
378 views

Is it safe to invoke PHP GD functions if you don't know whether file is a valid image?

There is image upload function in web application. After image is uploaded, it's resized using functions from PHP GD like imagecopyresampled and others. Before invocation of PHP GD's functions there ...
4
votes
2answers
838 views

What is the purpose of using Youtube-style alphanumeric ids as URL slugs?

I asked a question on StackOverflow on how to generate the alphanumeric/base64 resource IDs that Youtube, Instragram, and others use to identify videos/pictures/etc. Discussion led to the question of ...
0
votes
1answer
804 views

Interpreting Snort's stream5 alerts

I am using snort on a mirrored switchport. We have a lot of apple devices that are downloading mp3s directly from a directory index. Snort is showing me a huge amount of, in particular, these two ...
2
votes
1answer
632 views

Using mysql root account to execute root commands

Suppose that I have full root access to mysql databases, but not root user shell (linux). How can I use the full root access to mysql databases to execute root commands?
39
votes
3answers
78k views

What is the difference between authorized_key and known_host file for SSH?

I am learning basics of SSH protocol. I am confused between the contents of the following 2 files: ~/.ssh/authorized_keys: Holds a list of authorized public keys for servers. When the client ...
1
vote
2answers
3k views

How to invalidate a session on browser closure?

I have a web application where web session need to expire after stipulated period of time. However capturing browser closure event is not a good idea to invalidate a user session. What can be an ...
9
votes
4answers
5k views

How does BeEF work? (working understanding)

I have recently come across the BeEF- a browser exploitation tool. In most of the articles, it is said time and again that it is developed for research and pen test purposes! Has anyone worked with ...
1
vote
2answers
205 views

Trusted device web application

I would like to build a web application which has a trusted device feature. What is required to store for recognizing the machine securely? Can I safely store an encryption key (private) on the ...
3
votes
1answer
236 views

What are the benefits of federated identity management over bare bones public key encryption?

What are the main reasons for having a federated identity system such as OpenID over having identities based purely on a public key? OpenID uses an Identity Provider to confirm that a user owns a ...
0
votes
1answer
284 views

Good reading about windows architecture/reversing [closed]

I have a feeling that I need to get more knowledge about system programming and winapi/windows architecture in particular to be able to understand how lots of exploits work (like those exploiting ...
3
votes
1answer
468 views

Are OpenJDK and non-Windows systems vulnerable to the Sept. 25th 2012 Java vulnerability?

I have heard of this vulnerability, but although it was announced on the Full Disclosure list, it does not provide any details (other than a severity assessment). Does anyone have more info than me, ...
1
vote
0answers
713 views

Comparison of Whitehat Security and Veracode [closed]

I'm a research student. My topic is Web Application Security Scanners. The companies under my study are WhiteHat Security, Cenzic, Veracode, Qualys, IBM Rational Appscan, HP WebInspect, Fortify. I'm ...
1
vote
2answers
206 views

What's the right way to prevent shell bounce back?

When an exploit was successfully executed, is there a way to block the user from bouncing back a shell? I would like to know about this on both Windows and Linux machines.
1
vote
1answer
2k views

NGINX / HTTP TRACE

I have a http server Nginx with HTTP TRACE Enabled. A single nmap --script=http-methods.nse host.name give this result : Not shown: 988 closed ports PORT STATE SERVICE VERSION [...] ...
5
votes
2answers
268 views

Does anyone know about how LinkedIn was compromised?

I know some super basic stuff about website security (e.g. using HTTPS, escaping user input), but hearing about high profile sites getting compromised makes me wonder in what way they were broken ...
0
votes
1answer
92 views

What expertise is required to create an Windows intrusion report?

I need an expert on a subject I know very little. I had a breach on one of my Windows systems. I know how someone got in but for legal purposes I need to prove that some former employee, whom I ...
7
votes
5answers
591 views

How to prevent pay per show/click abuse?

We have a webapp. 3rd party websites put our banners on their pages (banner is a snippet of HTML). They are paid for it using "Pay per click" or "Pay per show" methods. So 3rd party website's owners ...
5
votes
3answers
3k views

bcrypt: random salt vs computed salt

I'm pretty new to the whole password hashing business, so I might be missing something obvious. I was looking at the bcrypt algorithm, in particular BCrypt.Net, and I was wondering if it wouldn't be ...
1
vote
2answers
715 views

Tampering req.getParameter() Vs req.getAttribute() [closed]

Is following code vulnerable? If yes, how it can be exploited? <% Boolean redirectToSomeSite = (Boolean)request.getAttribute("redirectToSomeSite"); String someSiteUrl = ...
29
votes
4answers
1k views

What is the impetus for major sites being HTTPS-exclusive now?

I've noticed that there are a good number of sites (Google, Twitter, Wikipedia) that are serving up every page over HTTPS. I can understand given that everyone is concerned over privacy now, but has ...
4
votes
2answers
154 views

Taking action for exploit attempts

Just recently I see I have had about 40 hits in one second for the following Snort rule- signature id 1:16008, which corresponds to the CVE-2007-6239: "... allows remote attackers to cause a denial of ...
-1
votes
3answers
551 views

find password and iv of an encoded string knowing the decoded string

If I would know the clear and encoded versions of a string could I somehow find the password and.or iv that wore used to encode it? Encoding done with open_ssl aes-128-cbc.
2
votes
3answers
2k views

How to block the websites on client machines

In our office we are blocking sites like Facebook, Twitter etc.The problem is that some of the users bypass our proxy and firewalls through external proxy sites like www.youhide.com or ...
0
votes
2answers
3k views

Should ettercap make the targets this slow?

I recently started experimenting with ettercap, however, I quickly noticed that when I try and arp poison targets they can almost never communicate with each other. Is this normal? My computer is a ...
2
votes
2answers
2k views

Is it harmful to allow http requests with very long querystrings in IIS?

I am developing a website with a search feature that could generate HTTP requests that are very long (up to 15,000) characters. However, IIS has a default limit of 2048 characters for querystrings. ...
2
votes
1answer
771 views

Open source or common implementations for reverse proxy web application security

I realize there is already a question similar to this one, but this is somewhat of a follow-up. I understand that a reverse proxy server by itself is hardly useful as a web app security measure ...
13
votes
1answer
10k views

Where is the salt on the OpenSSL AES encryption?

I'm interested in knowing how and where OpenSSL inserts the generated salt on an AES encrypted data. Why? Im encrypting data in Java classes and need to guarantee that I can use OpenSSL to decrypt ...
3
votes
2answers
521 views

AES CBC over TCP - when is new IV needed

I am working on a project where two devices will be communicating with AES with CBC over TCP. We already have a secure mechanism for sharing the encryption/decryption key. I am not sure if we need to ...
1
vote
3answers
2k views

Testing http authentication via netcat

I'm currently trying to track down what I think is a false positive from Nessus, my attempts to netcat into the device are failing, but I believe the service is shut off anyway and Nessus is being ...
1
vote
2answers
646 views

Can fully homomorphic encryption be practical?

Fully homomorphic encryption has been implemented by Craig Gentry using ideal lattices. Can it be applied to data stored on a private cloud setup in practice? I've seen references here and on other ...
10
votes
4answers
7k views

What are the disadvantages of single sign-on authentication?

We were discussing to implement single on in our web application,right now after analyzing we came to know that the following were the advantages of single sign on authentication. Advantages Users ...
3
votes
1answer
1k views

TESTING DNSSec from command line

I am doing a research project on DNSSec. I have a SOA, Stub resolver and a client as well as a attack machine. My question is this. On a Linux Client is there a way test for validity of record ...
7
votes
1answer
1k views

Plausible deniability with TrueCrypt

If I have a TrueCrypt container with a capacity of 2 GB which I use to fill 1 GB with real, hidden data, and leave the other GB for decoy data, then if I need to reveal a password and give out the ...
4
votes
1answer
187 views

Computational Feasibility of finding 'Good Links' of the following format

I recently stumbled upon this and am checking here to see if what I am proposing is indeed feasible and can be considered a breach of privacy. For obvious reasons I am not revealing the website ...
21
votes
6answers
3k views

Why do some sites prevent users from reusing their old passwords?

I have always wondered why it is that bad to reuse old passwords; it should not be the end of the world if we happen to use an old password that we previously used. After all, I believe most of the ...
8
votes
1answer
2k views

Why does Microsoft limit password length? [duplicate]

Possible Duplicate: Should I have a maximum password length? According to a recent TNW article: Microsoft doesn’t like long passwords. In fact, the software giant not only won’t let ...
5
votes
2answers
295 views

How will security need to be changed if we can crack password hashes in quasi-polynomial time?

If we suppose that we have access to some form of generalized password hacking/cracking that can somehow find an $n$-bit password in time $O(n^{\log n})$, is there need for alarm? This question ...
1
vote
2answers
1k views

How to defeat ASLR in linux kernel? [duplicate]

Possible Duplicate: Stack Overflows - Defeating Canaries, ASLR, DEP, NX is there anyway to disable ASLR in Linux kernel 2.6.32-71.el6.x86_64, with Apache privileges?? I tried this commands: ...
3
votes
1answer
3k views

Detect a server supporting SPDY?

With my current interest in the CRIME attack, I am currently trying to check if there actually exits a way to "fingerprint" a server that supports SPDY? My research lead me to believe only that the ...
8
votes
1answer
189 views

Why would it be preferable for a system to shut down when the security log is full?

When running in a configuration that supports Common Criteria, Windows must be configured to shut down when the security event log is full. Why is this a preferable option?
12
votes
1answer
2k views

Insecure versions of crypt hashes

I read at crackstation not to use these variants of bcrypt* ($1$, $2$, $2a$, $2x$, $3$),but I've used bcrypt ($2a$) in various sensitive implementations recently. Can any security expert clarify why ...
4
votes
1answer
177 views

What is the effect if a Cisco router is transmitting PDUs to an ISP?

I was recently tipped off by our ISP that our router is transmitting PDUs to their switch, and told that if we don't turn it off they might be able to penetrate our LAN. What do they mean that we are ...
3
votes
2answers
4k views

Best practices for TrueCrypt + Yubikey combination

I'm trying to find a secure and convenient way to encrypt my external disk with TrueCrypt. Currently I use a 50 character strong password but I'm tired of typing it every single time. I have a Yubikey ...
0
votes
1answer
2k views

Is OSX or Mac hardware used in the InfoSec world? What resources are available? [duplicate]

Possible Duplicate: Mac OS X from an IT Security Practitioners' Perspective? I'm new to the OSX world (formerly Windows background) and am interested in understanding what is or isn't ...
3
votes
2answers
369 views

Secure Spring FrameworkUser Management

I got asked this question: "Any decent reusable / plug-able Spring user management systems (registration, change pwd, reset etc)? How do you guys do authz in Spring, including managing those roles ...
3
votes
3answers
10k views

How to create ssh tunnel using netcat?

I want to create reverse connection between two machines, but these is a firewall in the middle preventing all connections, except ssh. I want to create ssh tunnel using netcat, could you please tell ...
0
votes
1answer
1k views

Telnet local privilege escalation exploits possible even when telnet is running under a normal user account?

http://www.exploit-db.com/exploits/8055/ says: The telnet protocol allows to pass environment variables inside the telnet traffic and assign them to the other side of the tcp connection. The ...

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