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

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752 views

How to use and create attack graphs

I am trying to learn more about attack graphs and how they can be used. I have read a little bit about them from some simple Google searches and believe that they could be a useful tool for work. I ...
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2answers
1k views

Memory Dumping - Cause for concern in Virtualization?

Recently, I started exploring threats to Virtual machines in general. The first question that popped into my head was whether a host machine can dump its entire memory onto a file, and inspect the ...
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4answers
13k views

How to prevent my website from getting malware injection attacks?

My website was banned as a malware website by Google. When I checked the code, I found out that some code injected many files on my server. I cleaned everything manually, edited all files on my server ...
5
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2answers
143 views

Strange escape codes in a GET request - is this a known attack?

I recently came across some entries in nginx's access logs that resemble the following: ##.##.##.## - - [24/Sep/2014:01:21:51 -0400] "GET /767/browser-wars-side-show-ho ...
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2answers
348 views

Is this a DNS attack?

The following graph shows the UDP DNS queries/sec (blue) and DNS responses/sec (red) of traffic passing a router over the preiod of 4 days. DNS query is a DNS packet with query/response flag set to 0 ...
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1answer
337 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 ...
5
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1answer
567 views

Trying to prevent Cisco toll fraud

A little back story on the setup first; We have a Cisco VoIP setup at our remote office(where I'm at) and the main CCM/CCX/Unity setup is at the parent company across the US in Connecticut. We have ...
4
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2answers
532 views

An attack from my Employer

I am working in an ISP company as a junior support specialist. Recently, I have a serious suspicions that one of our "head" stuff member is compromising me by being able to control(see) my traffic.. ...
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2answers
1k views

Extract AES key by comparing plaintext and encrypted data

Is there a kind of analysis which would enable me to get AES key which was used for encrypting arbitrary data while I have both original and encrypted version of data ? The problem is that the AES ...
4
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4answers
413 views

Received a Kindle from a stranger, what are the risks?

While getting a coffee today, a man walked up to me and offered me a kindle. he said he no longer wanted it and that he was looking to give it away. An avid reader, I accepted. It has no accounts on ...
4
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2answers
303 views

How can I find out who owns a block of IPs?

I'm currently going through the logs on my apache install for potential intrustions, and I'm finding a lot of hits for SQL injections and exploit testing, from 173.212.195.* . I'm now trying to find ...
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4answers
1k views

Is this an attack and how can I fix it?

I don't know where to start in searching the forum for existing threads that might cover my issues. I recently received a spoof email pretending to be from a client for whom I've just started to do ...
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3answers
490 views

How do I protect myself against the attacks in this php script?

Due to a vulnerability in how PHP was installed (Shared VPS with PHP installed as an Apache module instead of CGI) and hence how OSCommerce was configured (with security of 777 on certain ...
4
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2answers
419 views

Are there volatile memory chips which dont retain data after power off?

It was demonstrated that dram modules can retain information up to 10 min after power off in certain conditions. My question - are there memory types which will retain data 10 sec at max even if being ...
4
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4answers
360 views

Security risk of adding a HTTP Header with server identifier

We are about to deploy a web application to a web farm of quite a few web servers. During our testing we have found issues happening in one of the servers but not in others. Most of them because of ...
4
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5answers
290 views

Can SSL requests be proxied by issuing a second certificate?

Alice wants to login to her account at https://www.bobsbank.com/. However she clicks on a malicious link in an email and instead gets sent to the malicious site https://www.charliesbank.com/. The ...
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3answers
225 views

Should user input be validated for it's length?

Is it bad not to validate length of user input to text field at server side. May it lead to such vulnerabilities as buffer overflows and other? I think it depends on programming language of ...
4
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2answers
266 views

XSS when <, > and " are escaped

I'm pentesting a website that has a reflected XSS, or at least a vector for a reflection, but the issue is the following : It escapes <, >, " to their URL entities (not &, ) or () You are ...
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4answers
212 views

Attack where browser URL appears valid

I remember reading about an attack where the "location bar" in a user's browser displays a valid URL (e.g. https://www.paypal.com/), but the traffic is really being directed to or intercepted by an ...
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4answers
851 views

VGA/HDMI Based Attack

Can I attack a PC via the VGA port? Is VGA one way or does it accept data from the other side? How about HDMI or DVI? And if so, are there known malware or PoCs to do that? or is it theoretically ...
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2answers
576 views

Is this an example of XSS attack?

A scripter sees on certain web pages it's technically possible to include markup like HTML and CSS/JS. It's technically possible to submit a javascript or iframe and have it display to the visitor ...
4
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3answers
197 views

Most informative DEF CON talk?

I didn't make it to DEF CON this last year... I'd like to know what you thought was the most interesting/informative presentation and possibly a link to more information on the topic. [mod - ...
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3answers
1k views

Create a page to experiment with SQL injection [closed]

This semester, I have taken a course on Information Security and my project for this course is to implement an SQL injection to obtain admin privileges. For this I first download Havij software ...
4
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4answers
636 views

Can public keys be a security risk when performing password-less SSH logins?

Some companies use monitoring software such as nagios or icinga. In order to perform checks on the servers, they often need password-less SSH logins. The servers being checked put the public key of ...
4
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1answer
120 views

Voice Call Safety

When i was dealing with an assistant of my bank through mobile call, she asked me to insert my bank login code after a beep. I was wondering if this procedure is secure against a malicious agent who ...
4
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2answers
476 views

SSH : Remote Host Identification Changed

As part of my daily routine, I was SSH'ing to one of the corporate servers. However this time I was presented with following message @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ ...
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1answer
678 views

How to prevent CSRF if you want to include Flash plugins in your form like Uploadify in your form?

What is CSRF? I need a basic definition that is not just lifted from Wikipedia. I understand SQL injection, XSS, cookie poisoning, but I just cannot wrap my mind around this. I am using a ...
4
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1answer
167 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 ...
4
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1answer
486 views

How secure is NFC on mobile devices?

Near field communication is becoming more commonly available in modern mobile devices, such as smartphones and tablets. This functionality can be used to communicate between such devices, or with ...
4
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2answers
206 views

Most secure response for a server to return to a user scanning for exploits

I have ASP.NET servers hosted in IIS, regularly i see bots attempting to scan my server searching for outdated versions of phpMyAdmin, mysql etc. Currently these requests all return 404 because ...
4
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1answer
117 views

Security consequence of Javascript hole in an online chat?

For an online chat that allows basic HTML, what happens if they leave an open way for a potential hacker to execute javascript on everyone who is in the chat? What is the worst thing they could do?
4
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3answers
144 views

Does allowing everyone know when a server process was started pose a security risk?

I recently found that in Microsoft .NET framework an impersonated thread is not allowed to request "time at which the current process was started". This could be done intentionally or this could be ...
4
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2answers
326 views

Can a MitM attack occur on an ISP's local exchange or street wiring cabinet?

If an attacker were to dig up the 'outgoing feed' from my local exchange or the street cabinet, could they sniff my entire neighborhood's network traffic? Or is this infrastructure secured against ...
4
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2answers
1k views

How to use attack trees and attack graphs

I am trying to understand how attack trees\graphs can be used in the security process. I read a lot of papers presenting the topic and how this reppresentation can be useful, but I really don't ...
4
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1answer
96 views

Use of JavaScript by LastPass to encrypt & decrypt the password database a secure approach?

LastPass is a top-rated password manager that comes as a browser extension and uses a master password to encrypt and decrypt the password database using the JavaScript. Is this a secure way of doing? ...
4
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1answer
309 views

Attacks against HIDS software running on the same machine

I am interested in the attacks that could be used to compromise or disable HIDS software such as Tripwire or Samhain. I understand that ideally checks should be run periodically and the database ...
3
votes
4answers
23k views

how safe is the 256 bit encryption used in bank transactions

Most of the banks use a 128 bit or 256 bit encryption. What does this mean? Does it mean that the keys used in ssl are 128 bit long or what? If they are the ssl key lengths then 128 bit rsa keys are ...
3
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3answers
362 views

Is there an attack that can modify ciphertext while still allowing it to be decrypted?

Is there any way an encrypted file using AES-256 could be modified without alerting the file owner, ie., so it can still be decrypted with the same key? I know that without an initialization vector ...
3
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4answers
687 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 ...
3
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1answer
695 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. ...
3
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2answers
1k views

I'm currently receiving a targeted attack

Since yesterday, I receive forged mails which are targeted at me. They use personal information, seem to come from one of my friends and only contain links to these web sites: http ...
3
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1answer
641 views

Are passwords stored in the cookie? encrypted?

Whenever I connect to security.stack.exchange, I am automatically logged in. I haven't allowed the browser to store my password. When I delete all cookies stored by the security.stack.exchange, I have ...
3
votes
5answers
5k 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 ...
3
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3answers
485 views

Wireless security attack techniques

Before I ask for some advice, please don't assume I'm a script kiddie or such. This is for one of my wireless security class (CSS 1015). It's a Saturday class and only 6 students are in the class ...
3
votes
4answers
1k views

What are the chances of a database being hacked?

How often do websites (and their databases) get hacked? Hacked as in user accounts stolen, tables flushed, and all in all, damage done to the database. I'm talking about e-commerce websites, and ...
3
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3answers
377 views

Is this a web attack I should be concerned about - trying to enter code for form vars

I have a created a simple CGI script running on a web server where a user can login using a username and password. The username and password are entered via a html form and the form POST's the data ...
3
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2answers
1k views

Reverse shell connections

Why are reverse shell connections so popular in the event of a successful intrusion? Many "hacking" videos show this and it is often seen in practice. Would not most servers restrict outgoing ...
3
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2answers
920 views

How does the Yahoo webmail exploit work?

I got an email (referring to me by name) from somebody I knew a while ago and the email itself was just two/three lines containing a bit-ly link. Although it seemed like it actually could be ...
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4answers
1k views

Comparing penetration testing suites

I've been using Backtrack for a while now. I was wondering if there is anything better, or on par with, that is worth looking into. Thoughts?
3
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1answer
237 views

Could Stock Exchange be shut down by HFT attack vector?

First of all, stock, not stack exchange. I just read this post on Krypt3ia. In short, it says that HFT attack vector in combination with DDoS is possible new nemesis for stock exchange IT systems. ...