Programming :: Need Exploit Codes For An Echo Program In C?
Mar 13, 2011
I am a student taking part in a comptition. We have a set of questions to complete within today. Can anyone please help me out with it. I have a custom written "echo" program in C, running on port number "1220" which echoes back the first 16 characters of whatever is given as the first command line argument. But somehow, my brother had got unauthorized remote root access. The program is given below. How did he do it? Please give the exploit code and explain how it works.
#include
#include
void echo(char* input) {
[code]....
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Jun 20, 2011
I have a simple testing program like this:
/*The Parallel Hello World Program*/
#include <stdio.h>
#include <mpi.h>
[code]...
My program is, I can't compile this program using gcc, and I can't find something like pgcc in ubuntu. How should I compile this program? After compiling, what should I do to run this program? Can I use something like mpirun to run it? I want to try to use both cores of my computer to run it and make it shows Node 1 also besides Node0.
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Aug 28, 2010
I think I put this in the wrong place
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Nov 3, 2010
I've got a 'nested' for loop which has a grep in it, if the grep fails there's no output - however the error code is still $0 and the second for loop is still entered, there's also a grep in the second for loop.I guess ultimately what i need to know is whether there's a way of making grep generate an error code. when no results are found?
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Dec 11, 2008
I have downloaded whole linux source codes of fedora in a dvd. There are several rpm packages and lots of directories in it. I want to load all source codes to version control system (svn or cvs) which is loacated in a server and develop it step by step .During this time I want to build my own distribution. So I need to know how to build all these packages at once. Is there anyone who can explain "how to do" to me
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Apr 4, 2011
I wrote a c++ program but for security reasons I need to make sure that no one can read my codes by my ".out" files. I did everything I could. But everyone can see it by "strings Alpha.cpp".I heard that g++ has some options to do so.
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Jun 16, 2010
I got some problems and need your help.
In school, my codes are writeen under UNIX system (Solaris10/SUN), now I need to transfer those codes to Linux (Redhat5). But after I directly copy to Linux, it shows many errors and warnings.
Does anyone know which codes I need to modify to specifily suit for UNIX? I am not familiar with those systems and hope to get your kind help.
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Jun 17, 2009
I am trying to echo some value using awk, and for reading the file i am using cat command. If there no space in the file content then the following script result correctly.
console: # cat 1
one;two;three;
four;five;six;
[code]....
In case any space is there in the file 1 then i am facing the problem in the output value
console: # cat 1
o ne;two;three;
four;five;six;
[code]....
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Sep 25, 2010
I wish to implement some part of my codes to use the GPU of my graphic card but I have no idea whether GNU as already implemented it (as for OpenMP). I mean, there are PGI Fortran compiler which embedded CUDA but I figure it's not free. I also wonder if that works only with ATI graphic cards or if for instance I can use my Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller.
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Jan 18, 2010
I'm confused about what "echo $0" in a shell actually return. Consider these tests:
Code:
[root@e11apvl151 ~]# # Login shell:
[root@e11apvl151 ~]# echo $0
-bash
[root@e11apvl151 ~]# # Starting a new shell
[root@e11apvl151 ~]# bash
[root@e11apvl151 ~]# echo $0
bash
[root@e11apvl151 ~]# screen
[root@e11apvl151 ~]# echo $0
/bin/bash
Depending on wether the shell is a login shell, a regular shell, or a screen utility, I get different results.
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Jan 8, 2011
One of the feature in my application involve changing of hardware setting. This require the user to be root or have administrative right.Before my application enable that feature, I want it to check whether the user is "root" or not, or whether user use "sudo" command to run the application or not, or whether the user has administrative rights or not.What are the codes or library that can do this?
NOTE: Sometimes, advanced linux user may set the user id of root to something else other than 0. So, getuid() may not be helpful in this case.
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Jul 19, 2010
I need a script that can print some series of strings in colors based in the information of a file, for simplicity let's say it only does:
Code:
#!/bin/bash
printf "e[1;31;32m%-10se[00m" "OK"
When you execute this in the command line it prints a bold green 'OK'. So far so good.
Now, I need to check the output of the script over time using the command watch. The problem then arises. watch seems to ignore the escape codes and just prints:
Code:
[1;31;32mOK [00m
Is there any way to fix this?
If not, how can I check inside the script if it is being executed from a command? (watch in this case) So I can print without color for those cases.
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Jan 11, 2010
I am testing the serial ports on a Single Board Computer(SBC) running Linux kernel 2.6.29. I usually do this by connecting the serial port to another PC serial port, then doing "cat /dev/ttyS0" on PC and "echo hello > /dev/ttyS0" on the SBC. However in the current system, "echo hello > /dev/ttyS0" command does not return at all! Also no characters appear on the destination port. I am running the echo command as root. The system boot messages show that the serial port in indeed /dev/ttyS0.
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Jan 25, 2010
I have always encountered this problem in ubuntu bash shell scripts that echo command in a function will be treated as a return value when used in a function. e.g.
[code]...
The output would simply be xyz. Hence the echo seems to function as a "return" command when used in a function with a return value.
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Dec 1, 2010
What's the difference between PHP echo() and PHP print(), especially in the execution time?
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Jan 25, 2011
I try to write script and echo two command at the same line .
echo "A"
echo "B"
How can I pipe above two command at the same line in text file . So, in the output text file , you can see below ? Code: A B not Code: A B
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Feb 16, 2011
I am working on an epoll version of an echoserver that I am porting from a multithreaded version I wrote.What it should do: The server should get a connection from a client > say x client connected > print x message from said client. What it is doing: The server looks like it is only accepting one connection at a time, and any other clients are queued. When the queue is empty it looks like the program is aborting with a SIGABRT. EDIT:// fixed the program exiting in the close function. Still one client at a time
Code:
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
[Code]...
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Jan 4, 2010
I have a problem to use echo to display the content of a variable.
This is what I do:
Code:
#!/bin/bash
USAGE="Usage: name [OPTIONS] [DIRECTORIES]"
echo $USAGE
When I run this little script I get the following output:
Usage: name [OPTIONS] R
So I think that [DI might be some sort of escape sequence. But I do not know how to unescape it. Does anyone have a hint for me?
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Dec 16, 2010
What is the difference between
$echo cat
$cat echo
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Jul 27, 2010
I am trying to automate yum update of specific package on a remote machine. Essentially, the script executes, does a yum update, if not needed it would return echo result "update successful", if it needs the update and it installs it without error, it will return echo result "update successful", or if it fails the update it would echo "update failed". So far I have this:
[code]...
This is OK, but I NEED it to just return the final echo "Update successful". I can't have all the other lines. How can I do this?
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Feb 15, 2011
I will have to code this. However I am lacking of time since I have too much to do. make a short code bash/dash to prompt the country with Zenity, then, get the PLS or m3u url and prompt with another zenity which radio to play. http://www.listenlive.eu/index.html
My code to get url's radio country.htm is:
Code:
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Dec 8, 2010
Dan Rosenberg has issued another Linux Kernel Exploit with PoC described in LWN [URL] I have tested that this exploit is not working on -Current (custom kernel, 2.6.36.1), which is good sign that Slackware is already immune of those problems.
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Dec 15, 2010
I was just wondering wether a directory (I know thats just a special file) could be a security problem, as they have execute permissions? Could an exploit be attached to a directory. Has this ever happened?
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Jun 8, 2011
I've got a user getting heavily spammed but other users on the same domain are fine, it all started last night here's some info...
-rwsr-xr-x 1 root root 700492 Jun 8 18:18 exploit
I've got loads of these in 'top'
5975 dovecot 15 0 3712 1712 1432 S 0.0 0.2 0:00.00 imap-login
and these in ps dovecot
dovecot 5250 5533 0 13:05 ? 00:00:00 pop3-login
root 5533 1 0 11:21 ? 00:00:00 /usr/sbin/dovecot
root 5534 5533 0 11:21 ? 00:00:00 dovecot-auth
dovecot 5663 5533 0 12:15 ? 00:00:00 pop3-login
ps exim i've got
Code:
mail 19725 32303 0 15:03 ? 00:00:00 /usr/sbin/exim -bd -q15m -oP /var/run/exim.pid
mail 19732 19725 0 15:03 ? 00:00:00 [exim] <defunct>
mail 20142 19725 0 15:03 ? 00:00:00 [exim] <defunct>
[code]....
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Jan 15, 2010
Ok so Basically i have 2 questions
1. i know how to create a file with c++ using but is there a way to save it to a specific location on your computer with windows and linux
Code:
2. i need to know how to run/execute/open a file in a c++ program im using and its not working
Code:
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Apr 8, 2010
I've been looking awhile now, but no patch for this is yet to be found. Does anyone have more info, or better, a fix? Last version from GNU's ftp server is also vuln as of this writing.
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Nov 8, 2010
A researcher at security firm Alert Logic has published code that could be used to compromise some versions of Google's Android Operating System. The exploit, if properly adapted, could make Android phones vulnerable to remote attacks and compromises.
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Dec 14, 2010
Exim user can get owned by a remote exploit [URL].. I was running Exim 4.63 5.el5_5.1 on CentOS 5.5 x86_64 and my Exim user got owned by that exploit.
Now I ran yum update and exim updated to 4.63 5.el5_5.2 I cannot find anywhere if this updated fixes the exploit.
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Jan 9, 2010
I've scanned my computer (I'm using Ubuntu 8.04 Hardy Heron) and ClamAV has issued it has found a virus called Exploit.PDF-9669. What seems strange to me is that such a warning always happens (or, at least, in the most cases) in the same folder tree "sys" and ClamAV issues the very same virus/malware warning (Exploit.PDF-9669).
An example:
sys/devices/virtual/vtconsole/vtcon0/uevent: Exploit.PDF-9669 FOUND
sys/devices/virtual/net/ppp0/address: Exploit.PDF-9669 FOUND
sys/devices/virtual/net/ppp0/broadcast: Exploit.PDF-9669 FOUND
sys/devices/LNXSYSTM:00/device:00/uevent: Exploit.PDF-9669 FOUND
My ClamAV version is 0.94.2/10275/Fri Jan 8 22:06:46 2010. It has been not updated since I installed Hardy in my computer last year. Is my computer in danger?
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Jun 9, 2010
I read this morning that MicroSoft and Adobe Flash released a huge security update to counter the threat of malicious apps taking over systems. Included in the fix was Excel spreadsheets. Apparently a hacker could send a spreadsheet that if opened could remotely take over your machine. I opened my update manager and there was a sizable Open Office and Java update.
Question: Are Linux/Ubuntu machines susceptible to the security flaws?
Question: Since Adobe Flash is considered proprietary and not updated through the Ubuntu update manager, do I have to manually update that package?
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