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  • Cracking WEP wireless networks [closed]

    - by John
    I have a problem.I am new to linux and would like to know how to crack a WEP and WAP wireless encrypted network.I have been typing the command "airmon-ng" i have even initialized the wlan0 with the following command on Backtrack 4 but it has failed,When I use airmon-ng command, it does not display my wireless driver.SomeOne please xplain to me from scratch.Would really appreciate it.

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  • How Can I Find Out *HOW* My Site Was Hacked? How Do I Find Site Vulnerabilities?

    - by Imageree
    One of my custom developed ASP.NET sites was hacked today: "Hacked By Swan (Please Stop Wars !.. )" It is using ASP.NET and SQL Server 2005 and IIS 6.0 and Windows 2003 server. I am not using Ajax and I think I am using stored procedures everywhere I am connecting to the database so I dont think it is SQL injection. I have now removed the write permission on the folders. How can I find out what they did to hack the site and what to do to prevent it from happening again? The server is up to date with all Windows updates. What they have done is uploading 6 files (index.asp, index.html, index.htm,...) to the main directory for the website. What log files should I upload? I have log files for IIS from this folder: c:\winnt\system32\LogFiles\W3SVC1. I am willing to show it to some of you but don't think it is good to post on the Internet. Anyone willing to take a look at it? I have already searched on Google but the only thing I find there are other sites that have been hacked - I haven't been able to see any discussion about it. I know this is not strictly related to programming but this is still an important thing for programmers and a lot of programmers have been hacked like this.

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  • What are some topics you'd like to see covered in an 'Introduction to Network Security' book?

    - by seth.vargo
    I'm trying to put together a list of topics in Network Security and prioritize them accordingly. A little background on the book - we are trying to gear the text towards college students, as an introduction to security, and toward IT professionals who have recently been tasked with securing a network. The idea is to create a book that covers the most vital and important parts of securing a network with no assumptions. So, if you were a novice student interested in network security OR an IT professional who needed a crash course on network security, what topics do you feel would be of the upmost importance in such a text?

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  • Problem with return 2 libc method

    - by jth
    Hi, I'am trying to understand the return2libc method. I'am using an ubuntu linux 9.10, 32 bit with ASLR disabled. In theory, it sounds quite easy, overwrite the saved eip with the address of system() (or whatever function you want), then put the address to which system() should return and after that, the parameter for system, the "/bin/bash"-string. But what happens is that my exploit keeps segfaulting the vulnerable program. I assume something with the system()-address went wrong. This is what I did so far: Determined the address of system(): (gdb) print system $1 = {<text variable, no debug info>} 0x167020 <system> (gdb) x/x system 0x167020 <system>: 0x890cec83 I used the subsequent x/x system because those 3 bytes returned by print system looks like an index in some sort of jumptable (PLT?), so I assume 0x890cec83 is the right address which is used to overwrite the saved eip. After that I determined the address of the /bin/bash string in memory, using a small C program which basically consists of this line: printf("Address of string /bin/bash: %p\n", getenv("SHELL")); Then I looked a little bit around in the memory and fount /bin/bash: (gdb) x/s 0xbffff6ca 0xbffff6ca: "/bin/bash" After I gathered this information, I filled the buffer: (gdb) b 9 Breakpoint 1 at 0x8048407: file victim.c, line 9. (gdb) r `perl -e 'print "A"x9 . "\x83\xec\x0c\x89FAKE\xca\f6\ff\bf";'` Breakpoint 1, main (argc=1111638594, argv=0xc360cca) at victim.c:10 10 return 0; (gdb) x/s 0xbffff6ca 0xbffff6ca: "/bin/bash" Stack frame looks like this: (gdb) i f Stack level 0, frame at 0xbffff440: eip = 0x8048407 in main (victim.c:10); saved eip 0x890cec83 source language c. Arglist at 0xbffff438, args: argc=1111638594, argv=0xc360cca Locals at 0xbffff438, Previous frame's sp is 0xbffff440 Saved registers: ebp at 0xbffff438, eip at 0xbffff43c This seems all right to me, saved eip was overwritten with the (hopefully) correct system()-address, return address for system was set to "FAKE" (shouldn't matter) and the address of /bin/bash also seems to be correct. When I'am continuing the execution, victim segfaults on some strange address and certainly not in 0x890cec83: (gdb) cont Continuing. Program received signal SIGSEGV, Segmentation fault. 0x0804840d in main (argc=Cannot access memory at address 0x41414149 ) at victim.c:11 11 } Has anyone an explanation or a hint what happens here and why the execution isn't redirected to 0x890cec83? Thanks in advance, any hint, and be it only vague, would be appreciated. I have no idea why this doesn't work.

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  • How would I go about prevent DLL injection.

    - by wowus
    So the other day, I saw this: http://www.edgeofnowhere.cc/viewtopic.php?p=2483118 and it goes over three different methods of DLL injection. How would I prevent these from the process? Or at a bare minimum, how do I prevent the first one? I was thinking maybe a Ring 0 driver might be the only way to stop all three, but I'd like to see what the community thinks.

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  • Capture DDE Data that is being streamed in to a software

    - by user534391
    Hello, I have a trading software that gets data from the internet. I want to capture that tick data. There is one software that has been made by a local develop which is able to do that and it looks like it uses DDE (NDde.dll, NetSQL.dll). I want to write a custom application that does the same. Any pointers how I can check how the data is being streamed and how to capture that data. I don't think it is encrypted, since the other developer would not have been able to decrypt either. I just need to scan how the software is getting the data. Thank you.

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  • Crash firefox using Javascript

    - by user324675
    I'm part of a testing team and have been tasked with "behaving badly" using javascript in a firefox browser. I've tried these methods to take the browser down http://www.yuki-onna.co.uk/browserdeath.html but none of them do anything worse than cause a popup asking to shut down the script. Any other ideas?

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  • Getting a NullPointerException at seemingly random intervals, not sure why

    - by Miles
    I'm running an example from a Kinect library for Processing (http://www.shiffman.net/2010/11/14/kinect-and-processing/) and sometimes get a NullPointerException pointing to this line: int rawDepth = depth[offset]; The depth array is created in this line: int[] depth = kinect.getRawDepth(); I'm not exactly sure what a NullPointerException is, and much googling hasn't really helped. It seems odd to me that the code compiles 70% of the time and returns the error unpredictably. Could the hardware itself be affecting it? Here's the whole example if it helps: // Daniel Shiffman // Kinect Point Cloud example // http://www.shiffman.net // https://github.com/shiffman/libfreenect/tree/master/wrappers/java/processing import org.openkinect.*; import org.openkinect.processing.*; // Kinect Library object Kinect kinect; float a = 0; // Size of kinect image int w = 640; int h = 480; // We'll use a lookup table so that we don't have to repeat the math over and over float[] depthLookUp = new float[2048]; void setup() { size(800,600,P3D); kinect = new Kinect(this); kinect.start(); kinect.enableDepth(true); // We don't need the grayscale image in this example // so this makes it more efficient kinect.processDepthImage(false); // Lookup table for all possible depth values (0 - 2047) for (int i = 0; i < depthLookUp.length; i++) { depthLookUp[i] = rawDepthToMeters(i); } } void draw() { background(0); fill(255); textMode(SCREEN); text("Kinect FR: " + (int)kinect.getDepthFPS() + "\nProcessing FR: " + (int)frameRate,10,16); // Get the raw depth as array of integers int[] depth = kinect.getRawDepth(); // We're just going to calculate and draw every 4th pixel (equivalent of 160x120) int skip = 4; // Translate and rotate translate(width/2,height/2,-50); rotateY(a); for(int x=0; x<w; x+=skip) { for(int y=0; y<h; y+=skip) { int offset = x+y*w; // Convert kinect data to world xyz coordinate int rawDepth = depth[offset]; PVector v = depthToWorld(x,y,rawDepth); stroke(255); pushMatrix(); // Scale up by 200 float factor = 200; translate(v.x*factor,v.y*factor,factor-v.z*factor); // Draw a point point(0,0); popMatrix(); } } // Rotate a += 0.015f; } // These functions come from: http://graphics.stanford.edu/~mdfisher/Kinect.html float rawDepthToMeters(int depthValue) { if (depthValue < 2047) { return (float)(1.0 / ((double)(depthValue) * -0.0030711016 + 3.3309495161)); } return 0.0f; } PVector depthToWorld(int x, int y, int depthValue) { final double fx_d = 1.0 / 5.9421434211923247e+02; final double fy_d = 1.0 / 5.9104053696870778e+02; final double cx_d = 3.3930780975300314e+02; final double cy_d = 2.4273913761751615e+02; PVector result = new PVector(); double depth = depthLookUp[depthValue];//rawDepthToMeters(depthValue); result.x = (float)((x - cx_d) * depth * fx_d); result.y = (float)((y - cy_d) * depth * fy_d); result.z = (float)(depth); return result; } void stop() { kinect.quit(); super.stop(); } And here are the errors: processing.app.debug.RunnerException: NullPointerException at processing.app.Sketch.placeException(Sketch.java:1543) at processing.app.debug.Runner.findException(Runner.java:583) at processing.app.debug.Runner.reportException(Runner.java:558) at processing.app.debug.Runner.exception(Runner.java:498) at processing.app.debug.EventThread.exceptionEvent(EventThread.java:367) at processing.app.debug.EventThread.handleEvent(EventThread.java:255) at processing.app.debug.EventThread.run(EventThread.java:89) Exception in thread "Animation Thread" java.lang.NullPointerException at org.openkinect.processing.Kinect.enableDepth(Kinect.java:70) at PointCloud.setup(PointCloud.java:48) at processing.core.PApplet.handleDraw(PApplet.java:1583) at processing.core.PApplet.run(PApplet.java:1503) at java.lang.Thread.run(Thread.java:637)

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  • testing a shellcode...

    - by kmitnick
    hey folks, I have this piece of code to test a shellcode but I don't understand it so can anyone explain it to me??? forget about the assembly shellcode, what i want to understand is the C code char shellcode[] = "..."; int main(int argc, char **argv) { int (*func)(); func = (int (*)()) shellcode; (int)(*func)(); } I mean everything, what is the empty () ,please explain it as if you are explaining it to a beginner thnx all

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  • Could my forms be hacked.

    - by Mike Sandman
    Hi there, I posted a question yesterday, which I intend to get back to today however I wrote some JavaScript as a first line of prevention against XSS. However when testing this on my live server I catch some invalid input as the javascript catches the php section. My form uses post and php isn't in my form items (i haven't typed it in). Could this be picking up the form action or something? I'm baffeled, Any ideas Here is my code, it is triggered on the submit button. function validateForBadNess(){ var theShit = new Array("*","^", "$", "(",")","{", "}","[", "]","\", "|", "'","/","?",",","=","","gt","lt", "<","script","`","´","php"); var tagName = new Array(); tagName[0] = "input"; tagName[1] = "select"; tagName[2] = "textbox"; tagName[3] = "textarea"; for (ms=0;ms // loop through the elements of the form var formItems = document.getElementsByTagName(tagName[ms]); for (var xs=0;xs var thisString = formItems[xs].value; // loop through bad array for (zs in theShit){ //alert(thisString + " " + thisString.indexOf(theShit[zs])) if(thisString.indexOf(theShit[zs]) >= 0){ alert("Sorry but the following character: " + theShit[zs] + " is not permitted. Please omit it from your input.\nIf this is part of your password please contact us to heave your password reset.") return false; } } // loop for formitems } // tagName toop } // original condition }

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  • how to exploit vulnerability of php?

    - by Dr Deo
    i have never seen a buffer overflow exploit in live action. supporse I have found a server that seems to have vulnerabilities. Where can i get proof of the concept code preferably in c/c++ to exploit the vulnerability? eg i found this vulnerability Multiple directory traversal vulnerabilities in functions such as 'posix_access()', 'chdir()', 'ftok()' may allow a remote attacker to bypass 'safe_mode' restrictions. (CVE-2008-2665 and CVE-2008-2666). How can i get proof of concept code for educational purposes PS I am a student and my only desire is to learn

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  • Registry remotley hacked win 7 need help tracking the perp

    - by user577229
    I was writing some .VBS code at thhe office that would allow certain file extensions to be downloaded without a warning dialog on a w7x32 system. The system I was writing this on is in a lab on a segmented subnet. All web access is via a proxy server. The only means of accessing my machine is via the internet or from within the labs MSFT AD domain. While writing and testing my code I found a message of sorts. Upon refresing the registry to verify my code changed a dword, instead the message HELLO was written and visible in regedit where the dword value wass called for. I took a screen shot and proceeded to edit my code. This same weird behavior occurred last time I was writing registry code except on another internal server. I understand that remote registry access exists for windows systems. I will block this immediately once I return to the office. What I want to know is, can I trace who made this connection? How would I do this? I suspect the cause of this is the cause of other "odd" behaviors I'm experiencing at work such as losing control of my input director master control for over an hour and unchanged code that all of a sudden fails for no logical region. These failures occur at funny times, whenver I'm about to give a demonstration of my test code. I know this sounds crazy however knowledge of the registry component makes this believable. Once the registry can be accessed, the entire system is compromised. Any help or sanity checking is appreciated.

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  • injection attack (I thought I was protected!) <?php /**/eval(base64_decode( everywhere

    - by Cyprus106
    I've got a fully custom PHP site with a lot of database calls. I just got injection hacked. This little chunk of code below showed up in dozens of my PHP pages. <?php /**/ eval(base64_decode(big string of code.... I've been pretty careful about my SQL calls and such; they're all in this format: $query = sprintf("UPDATE Sales SET `Shipped`='1', `Tracking_Number`='%s' WHERE ID='%s' LIMIT 1 ;", mysql_real_escape_string($trackNo), mysql_real_escape_string($id)); $result = mysql_query($query); mysql_close(); For the record, I rarely use mysql_close() at the end though. That just happened to be the code I grabbed. I can't think of any places where I don't use mysql_real_escape_string(), (although I'm sure there's probably a couple. I'll be grepping soon to find out) There's also no places where users can put in custom HTML or anything. In fact, most of the user-accessible pages, if they use SQL calls at all, are almost inevitably "SELECT * FROM" pages that use a GET or POST, depending. Obviously I need to beef up my security, but I've never had an attack like this and I'm not positive what I should do. I've decided to put limits on all my inputs and go through looking to see if i missed a mysql_real_escape_string somewhere... Anybody else have any suggestions? Also... what does this type of code do? Why is it there?

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  • Palm webOS CSS Targeting Hack?

    - by Tom
    Although it is not good practice, I am looking for a CSS hack to target Palm webOS. The problem is that Safari 3+ is awesome, and I can do some things like gradient background animations on text, but only in Safari. Right now I use @media screen and (-webkit-min-device-pixel-ratio:0) {} and it works like a charm, no Opera, Firefox, or whatever, because if I set the background to the image as I do in Safari they will all be ruined. But Palm's browser is based on webkit, and it uses the rules inside, and Palm's browser doesn't support text backgrounds so all I get is the image moving, no text. I would prefer a CSS hack, but if need be a Javascript one will do.

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  • How can a hacker put a file on my server root (apache, php, 1and1)

    - by mike-sav
    Hi there, I have a site hosted on 1and1 and a couple of weeks ago I noticed a hacker had put a .php file on the server that when viewed in a browser exposed my DB schema, DB connection strings, FTP account (for file uploads using a form), etc, etc. Naturally I panicked and I wiped the server and reuploaded my files. Fortunatley I encrypt passwords using MD5 and I don't store things like credit card details, etc, etc. Now I checked my files and with all user input I use a clean function (htmlentities, sql_real_escape_string, etc, etc) that strips the input of any XSS or SQL injection. I have also made sure that the session key gets re-engineered when a user status changes (like they log into their account) to prevent session hijacking, my folder permissions are set to 755 and file permission are 644. Has anyone got any idea how this could have happened? Or if I'm missing something

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  • My site was recently attacked. What do I do?

    - by ChrisH
    This is a first for me. One of the sites I run was recently attacked. Not at all an intelligent attack - pure brute force - hit every page and every non-page with every extension possible. Posted with garbage data to every form and tried to post to some random urls too. All tod, 16000 requests in one hour. What should I do to prevent/alert this kind of behavior? Is there a way to limit the request/hr for a given ip/client? Is there a place I should be reporting the user to? They appear to be from China and did leave what seems like a valid e-mail.

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  • Limit URL Parameter Length in Web.Config

    - by Alex
    Is it possible to add some kind of restriction to the web.config to limit URL parameter length? I want to prevent people at the earliest possible point from submitting too large URL parameters so the server doesn't get taxed more than necessary in the event that somebody tries to "attack" it with large invalid URL parameters.

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  • Testing for security vulnerabilities on web applications

    - by Moak
    A lot of companies use CMS software that updates on the regular, often they are security fixes, implying that the previous version have security vulnerabilities. But most clients never upgrade this, or even the CMS has been modified so that an update would break the site. Are there sites that document these exploits, and instruct how to test for them? Or does this information not even get published? (in order not to have people try to exploit them) Also is there a generic php/js based check list to prevent hack attempts? I know about SQL injections and XSS, but I'm sure that there are more threats out there. Peace

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  • Got Hacked. Want to understand how.

    - by gaoshan88
    Someone has, for the second time, appended a chunk of javascript to a site I help run. This javascript hijacks Google adsense, inserting their own account number, and sticking ads all over. The code is always appended, always in one specific directory (one used by a third party ad program), affects a number of files in a number of directories inside this one ad dir (20 or so) and is inserted at roughly the same overnight time. The adsense account belongs to a Chinese website (located in a town not an hour from where I will be in China next month. Maybe I should go bust heads... kidding, sort of), btw. So, how could they append text to these files? Is it related to the permissions set on the files (ranging from 755 to 644)? To the webserver user (it's on MediaTemple so it should be secure, yes?)? I mean, if you have a file that has permissions set to 777 I still can't just add code to it at will... how might they be doing this?

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  • How to hack your own website

    - by Saif Bechan
    I am in late testing phase of my web application. The application will be tested at a larger scale now. During this time I want to try and hack my own system and application with some tools, scripts, etc. Mostly some code I can try and execute in the browser. I have backups for the whole system so even down to the kernel can be hacked. My system is nginx,apache,php,mysql on Linux CentOS.

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  • PHP - What to store in a session?

    - by eWolf
    I know about all the issues with session fixation and hijacking. My question is really basic: I want to create an authentication system with PHP. For that, after the login, I would just store the user id in the session. But: I've seen some people do weird things like generating a GUID for each user and session and storing that instead of just the user id in the session. Why? The content of a session cannot be obtained by a client - or can it?

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  • How to prevent arbitrary code execution vulnerability in our programs?

    - by Calmarius
    You always read in changelogs when your system or browser or any program updates that they fixed a bug that made possible that an attacker can execute any code in your computer with a forged website, or attacking your computer with carefully forged packets, etc... Because you read it so often that means any program can have similar vulnerabilites... What causes this? how to design our programs to prevent similar issues?

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