An attempt by a threat to exploit a weakness in a system.

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1answer
569 views

secure website against the ping of death attacks

Any programmer is interested in securing his website. So I found this http://www.youtube.com/watch?v=DB4eMFrQYiY&feature=youtube_gdata_player which talks about crashing a website using cmd only. ...
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3answers
495 views

does switching to linux remove existing computer virus

if you change from a malware/spyware infected windows setup to a linux setup will infections migrate to linux if they were on the computer? (when you are hacked/infected is it the op system that is ...
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2answers
299 views

NX bit: does it protect the stack?

I once heard the NX bit was a panacea, then that it was not. One detail I've wondered about though: Does the NX (no execute) bit protect against code inserted into the stack and executed there? It ...
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3answers
1k views

Javascript containing a long hexadecimal string and eval: is this suspicious?

At the bottom of the index.php file for a simple “contact us” form, I found the following (some whitespace and newlines added): try {if(window.document)--document.getElementById('12')} catch(qq) ...
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5answers
4k views

Efficient way for finding XSS vulnerabilities?

Manual (reliable) way: Put string containing characters that have special meaning in HTML into some parameter of HTTP request, look for this string in HTTP response (and possibly) in other places ...
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3answers
5k views

Can you tell if your computer was hacked and pictures stolen from 2-6 months ago?

Can a home computer, not wireless, be hacked from the outside and have pictures copied? Can I track and see if that happened?
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2answers
6k views

Kernel Intrusion on home broadband router - what does it mean?

My home broadband connection has been up and down all day, I took a look at the router logs and saw the following: Mar 27 12:22:30 kernel: Intrusion -> IN=atm1 OUT= ...
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2answers
219 views

Why would Tor not be vulnerable to this easy-sounding attack?

I'm thinking of this attack on Tor, which I'm sure won't work, as it is much too simple. Mr. Blackhat sets up lots of intermediate nodes. However, whenever TCP connections come in, they are given ...
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5answers
205 views

Methods used to reverse a hash

I know that a hash is a one-way-function and that therefore there isn't a reversal function. By reversing a hash I just mean to find some plaintext that gives the hash. I think that I understand that ...
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3answers
1k views

Disadvantages of HTTP GET/POST Flooding Attack?

I asked about What is HTTP GET/POST Flooding Attack? recently and I got a few detailed answers about what they are and how they work. Now I want to find out what are the disadvantages of them.
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2answers
268 views

Can an attacker slow down my server without compromising it?

We have a Linux server with WHM/cPanel which has been running without problems for almost 3 years now. Yesterday, the server became unresponsive (it was definitely there though) for around an hour. ...
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2answers
180 views

What are stolen passwords used for?

Say there is a line of business application which has username/password datatable in the DB. Personal email address is not stored, and usernames are assigned by an administrator. Someone gains access ...
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1answer
330 views

Need assistance diagnosing hacked website

Despite all my work to harden my website, someone has managed to hack it. When loading the homepage in IE8, the page appears to load normally. Then, the status bar briefly displays a request to a ...
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2answers
1k views

Some questions about penetration testing distribution Backtrack 5

I know just the basics of backtrack and I want to ask some questions about it: Can you attack an ftp server using backtrack? an email server? I have a Centos virtual private server and backtrack is ...
2
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3answers
222 views

Insert string to memory with null character

I'm trying to implement return-to-libc, here's the code void func(const char *str) { char buf[4]; strcpy(buf,str); printf("you entered [%s]\n",buf); } int main(int argc, char *argv[]) { ...
2
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1answer
225 views

Bypass va_randomize_space and stack-protector

Is a program compiled with the GCC -fstack-protector option and running in a Linux environment with the va_randomize_space kernel variable set to 1, totally protected against buffer overflow attacks? ...
2
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1answer
674 views

How does Binding Images with Malicious Patches happen?

Well I don't know if this technique is still used, but about 5-7 years ago it was a popular way to deliver a malicious patch (Sub-7 , bifrost etc ..) to a victim. There used to be a program that ...
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2answers
302 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, ...
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3answers
3k views

How should I defend against TightVNC brute-force attacks?

How should I defend against this type of attack? This is a tightvnc logfile excerpt from a linode cloud server running Ubuntu 12.04 (Precise) with the ubuntu-desktop package added to the bare server. ...
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3answers
137 views

hiding javascript in image

I have read a post in thehackernews and searched the net to find how it worked. How can anyone add javascript in an image such that when the image is displayed it can run a script. Can this be done ...
2
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1answer
248 views

Can malicious phone software mount a MITM attack on a phone call?

Suppose my smartphone has been compromised and there is malicious software running on it. You can assume that the malicious software has broken out of any sandboxes and is running as root. If I'm on ...
2
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2answers
2k views

Difference between masquerading and replay attacks?

I know that masquerading is to impersonate a false identity and replaying is the same wherein unauthorized person uses the credentials of the authorized one to have the privileges.Then what is the ...
2
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2answers
228 views

What steps can I take to identify what type of compromise of my computer has occured

I got involved in a strange scenario today :-) . Some 'UDPAgent.exe' file/worm/virus was trying to access my collegue's system and the antivirum program was showing that this particular thing is ...
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2answers
49 views

Is it possible to implement a secure game without having a reliable arbiter?

N players are playing a perfect information game (the kind of game where everyone knows moves of everyone) by making moves by turn (P1, P2, ..., Pn, P1, ..., Pn, ... till the game will finish). Game ...
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2answers
294 views

How to get URL behind REST-style

I've asked same question on StackOverflow but topic passed away with no answers except few comments so I'll try to ask the same question here as it's probably more specific to security. The only ...
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3answers
2k views

MITM: tools for intercepting and modifying traffic?

I want to carry out a MITM attack to modify traffic, so I can strip out/modify things in the request. For example: When I receive a request on port 25, I want to be able to intercept all the ...
2
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1answer
314 views

The impact of the Sony attacks on the security industry [closed]

First of all there was the PSN hack, which was compromised due to a vulnerable version of Apache and no Firewall and using a developer console. Then Sony Greece fell due to an SQL Injection attack. ...
2
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1answer
121 views

How are Ajax requests vulnerable to CSRF attacks if the Same-origin policy is applied?

What I know about CSRF is that a malicious website tricks a normal user into issuing a request to a trusted website using a form. I understand that is possible because we can post forms to different ...
2
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1answer
240 views

How to jam wireless AP?

The first comment under this question states: There are "smart jammer" techniques that are designed to mess with the protocol operations, not overwhelm the receiver with noise (e.g., for 802.11, ...
2
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1answer
141 views

What other place (besides libc) attacker redirect control flow to after an attack such as buffer-overflow succeeded

I am not sure this is a right place to ask this question or not. I want to know in previous or modern type of buffer overflow attack, when the attacker succeeded to overwrite return address, where ...
2
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1answer
921 views

Can active attacks really decrypt a particular AES-256, CBC, PKCS#7 encrypted file?

I recently found out that active attacks are a threat against AES-256, CBC mode, padded with PKCS#7 (the CBC mode in particular. I should supposedly change to EAX to guard against these attacks). ...
2
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1answer
267 views

solaris equivalent of /proc/self/environ LFI

I need to exploit a Solaris vulnerability for class, but we never dealt with Solaris before and I never installed it. Does Solaris have an equivalent to Linux's /proc/self/environ, exposing a ...
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1answer
187 views

amd64 safer than 686-pae?

Apart from stronger ALSR entropy... Is a system using amd64 any safer than 686-pae? What are the advantages, if any?
2
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1answer
654 views

Example of attack trees in the web application security analysis

Here I am again asking for some informations about attack trees usage in web application analysis. For my master thesis I decided to study the usage of this formalism in order to reppresent attacks ...
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3answers
132 views

I want to implement a new type of security feature over several platforms

I want to make a security feature that will go farther in discouraging people from looking through a secure system or server than what I have seen being implemented. Specifically, is there a way (or ...
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2answers
1k views

Microsoft ASMX Web Services Test form available on remote machines

I have been doing some research about Web Services security. I noticed that some sites are using Ajax and JQuery to consume ASMX WebServices. I navigated to the Web Service EndPoint and I realized ...
2
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1answer
3k views

How to Prevent This `Intrusion.Win.MSSQL.worm.Helkern`?

Sometimes my kaspersky Internet Security blocks this attack. What is this and how can I prevent/solve it for ever?
2
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1answer
183 views

Norse: Cyber Attack Map

This application analyzes web traffic and then beautifully displays attacks on a global map. How does it intercept web traffic so it can analyze it? Isn't web traffic private to everyone except to ...
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2answers
217 views

I've found security vulnerability in current linux distribution. What next?

I've installed ubuntu server 12.04 on VM two weeks ago. I've created regular snapshots. XXX time ago I've noticed unusual activity and I've found that a backdoor was installed into my server. One of ...
2
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1answer
619 views

How does Ram Scraper work?

I heard that during Christmas a lot of customer data was stolen using malware attack called Ram Scrapers. What exactly is a Ram Scraper?How would one infect a machine with it?What information can you ...
2
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1answer
261 views

what is the difference between virus, worm, trojan and other malware [closed]

Looking through the questions in IT security, I found out that there is no answer which cover this question in depth. I am aware of the answer and just hope to see something detailed about: main ...
2
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1answer
241 views

White-Box Cryptography Questions and References

I have recently started reading about White-Box Cryptography and looking at references/papers/web sites. A have a few questions I was hoping to get guidance on. As far as I can tell, WBC has ...
2
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1answer
304 views

Can JavaScript defeat source port randomization?

Can malicious JavaScript defeat source-port randomization in browsers? I am reading a research paper which seems to claim that the answer is yes: many browsers seem to always assign a random ...
2
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1answer
2k views

What is an active attack?

Browsing through the site I encountered this Is there a way to negotiate a secret between 2 parties with no prior knowledge? What is an active attack then?
2
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1answer
93 views

What does the Local exactly mean in CVSS?

CVSS (http://www.first.org/cvss/) provides the keyword local in the base vector. The definition given by FIRST is somehow not so clear for me: Local: Exploiting the vulnerability requires either ...
2
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1answer
82 views

How to detect if a user is logged in to a specific website?

I just learn about tabnabbing. Tabnabbing is a computer exploit and phishing attack, which persuades users to submit their login details and passwords to popular websites by impersonating ...
2
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1answer
109 views

What is DDOS TCP KILL?

I've recently been introduced to Kali Linux's webkiller tool, located in the websploit category. It works on the concept of Tcpkill. I don't understand how the DoS attack with Tcpkill works. Can ...
2
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1answer
102 views

Why would an attacker try to guess random email usernames on a small domain?

My mail server has recently come under a very bizarre attack. Every five to ten minutes, a new IP connects to SMTP, attempts to try weird usernames (like pil, bennett, netscape, msfuser, desktop, ...
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1answer
718 views

How to find the pharmacy hack in a Joomla website?

We've discovered today that our Joomla website has been hacked by a pharmacy trojan. It was difficult to discover because most users don't see it when visiting our website. One user reported about 2 ...
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3answers
226 views

How good is validating source with request.referer than checksum?

I have 2 portals(both are under my control & domain names are different) In 1st portal, there is a link on click of which User can directly get logged into 2nd portal. Link which will be hit in ...