MS06-040: Vulnerability in Server Service Could Allow Remote Code Execution (921883) (uncredentialed check)

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
 script_id(22194);
 script_version("1.32");
 script_cvs_date("Date: 2018/11/15 20:50:28");

 script_cve_id("CVE-2006-3439");
 script_bugtraq_id(19409);
 script_xref(name:"MSFT", value:"MS06-040");
 script_xref(name:"MSKB", value:"921883");

 script_name(english:"MS06-040: Vulnerability in Server Service Could Allow Remote Code Execution (921883) (uncredentialed check)");
 script_summary(english:"Determines the presence of update 921883");

 script_set_attribute(attribute:"synopsis", value:
"Arbitrary code can be executed on the remote host due to a flaw in the
'Server' service.");
 script_set_attribute(attribute:"description", value:
"The remote host is vulnerable to a buffer overrun in the 'Server'
service that may allow an attacker to execute arbitrary code on the
remote host with 'SYSTEM' privileges.");
 script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2006/ms06-040");
 script_set_attribute(attribute:"solution", value:"Microsoft has released a set of patches for Windows 2000, XP and 2003.");
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
 script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
 script_set_attribute(attribute:"cvss_score_source", value:"CVE-2006-3439");
 script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
 script_set_attribute(attribute:"exploit_available", value:"true");
 script_set_attribute(attribute:"exploit_framework_core", value:"true");
 script_set_attribute(attribute:"metasploit_name", value:'MS06-040 Microsoft Server Service NetpwPathCanonicalize Overflow');
 script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
 script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
 script_set_attribute(attribute:"canvas_package", value:'CANVAS');

 script_set_attribute(attribute:"vuln_publication_date", value:"2006/08/08");
 script_set_attribute(attribute:"patch_publication_date", value:"2006/08/08");
 script_set_attribute(attribute:"plugin_publication_date", value:"2006/08/08");

 script_set_attribute(attribute:"plugin_type", value:"remote");
 script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows");
 script_end_attributes();

 script_category(ACT_GATHER_INFO);
 script_copyright(english:"This script is Copyright (C) 2006-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
 script_family(english:"Windows");

 script_dependencies("smb_nativelanman.nasl","smb_login.nasl");
 script_require_keys("Host/OS/smb");
 script_require_ports(139, 445);
 exit(0);
}

#

include ('smb_func.inc');

global_var rpipe;

function  NetPathCanonicalize ()
{
 local_var fid, data, rep, ret;

 fid = bind_pipe (pipe:"\browser", uuid:"4b324fc8-1670-01d3-1278-5a47bf6ee188", vers:3);
 if (isnull (fid))
   return 0;

 # we initialize the buffer first
 data = class_parameter (name:"m", ref_id:0x20000) +
  class_name (name:"") +
  raw_dword (d:20) +
        class_name (name:"nessus") + # wcscpy in the buffer
  raw_dword (d:1) +
  raw_dword (d:0) ;


 data = dce_rpc_pipe_request (fid:fid, code:0x1f, data:data);
 if (!data)
   return 0;

 rep = dce_rpc_parse_response (fid:fid, data:data);
 if (!rep || (strlen(rep) != 32))
   return 0;

 ret = get_dword (blob:rep, pos:strlen(rep)-4);
 if ((ret != 0x84b) && (ret != 0x7b))
   return 0;

 # the patch should fill the buffer with 0, else it will return "nessus"
 data = class_parameter (name:"m", ref_id:0x20000) +
  class_name (name:"") +  # the path reinitialize the buffer
  raw_dword (d:20) +
        class_name (name:"") +
  raw_dword (d:1) +
  raw_dword (d:0) ;

 data = dce_rpc_pipe_request (fid:fid, code:0x1f, data:data);
 if (!data)
   return 0;

 rep = dce_rpc_parse_response (fid:fid, data:data);
 if (!rep || (strlen(rep) != 32))
   return 0;

 ret = get_dword (blob:rep, pos:strlen(rep)-4);
 if ((ret != 0x84b) && (ret != 0x7b))
   return 0;

 ret = get_dword (blob:rep, pos:0);
 if (ret != 20)
   return 0;

 ret = get_string (blob:rep, pos:4, _type:1);
 if (ret == "nessus\")
   return 1;

 return 0;
}

os = get_kb_item ("Host/OS/smb") ;
if ("Windows" >!< os) exit(0);

name = kb_smb_name();
port = kb_smb_transport();

if ( ! get_port_state(port) ) exit(0);
soc = open_sock_tcp(port);
if ( ! soc ) exit(0);

session_init(socket:soc, hostname:name);

r = NetUseAdd(share:"IPC$");
if ( r == 1 )
{
 ret = NetPathCanonicalize ();
 if (ret == 1)
   security_hole(port:port);

 NetUseDel();
}