IlohaMail Arbitrary File Access via Language Variable

# OpenVAS Vulnerability Test
# $Id: ilohamail_arbitrary_file_access_via_lang.nasl 6063 2017-05-03 09:03:05Z teissa $
# Description: IlohaMail Arbitrary File Access via Language Variable
#
# Authors:
# George A. Theall, <[email protected]>.
#
# Copyright:
# Copyright (C) 2004-2005 George A. Theall
#
# 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.
#

tag_summary = "The target is running at least one instance of IlohaMail version
0.7.10 or earlier.  Such versions contain a flaw in the processing of
the language variable that allows an unauthenticated attacker to
retrieve arbitrary files available to the web user.";

tag_solution = "Upgrade to IlohaMail version 0.7.11 or later.";

if (description) {
  script_id(14630);
  script_version("$Revision: 6063 $");
  script_tag(name:"last_modification", value:"$Date: 2017-05-03 11:03:05 +0200 (Wed, 03 May 2017) $");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");

  script_xref(name:"OSVDB", value:"7400");
 
  name = "IlohaMail Arbitrary File Access via Language Variable";
  script_name(name);
 
  summary = "Checks for Arbitrary File Access via Language Variable vulnerability in IlohaMail";
 
  script_category(ACT_GATHER_INFO);
  script_tag(name:"qod_type", value:"remote_vul");
  script_copyright("This script is Copyright (C) 2004-2005 George A. Theall");

  family = "Remote file access";
  script_family(family);

  script_dependencies("global_settings.nasl", "ilohamail_detect.nasl");
  script_require_ports("Services/www", 80);

  script_tag(name : "solution" , value : tag_solution);
  script_tag(name : "summary" , value : tag_summary);
  exit(0);
}

include("global_settings.inc");
include("http_func.inc");
include("http_keepalive.inc");

# Specify the file to grab from target, relative to IlohaMail/lang directory.
# ./notes.txt exists in each version I've seen. If you change it to 
# something else, you will also need to change the pattern checked
# against the variable 'contents' below.
file = "./notes.txt";

port = get_http_port(default:80);
if (!get_port_state(port)) exit(0);
debug_print("searching for IlohaMail Arbitrary File Access via Language Variable vulnerability on port ", port, ".");

# Check each installed instance, stopping if we find a vulnerable version.
installs = get_kb_list(string("www/", port, "/ilohamail"));
if (isnull(installs)) exit(0);
foreach install (installs) {
  matches = eregmatch(string:install, pattern:"^(.+) under (/.*)$");
  if (!isnull(matches)) {
    ver = matches[1];
    dir = matches[2];
    debug_print("checking version ", ver, " under ", dir, ".");

    # Try to exploit the vulnerability.
    #
    # nb: the hole exists because conf/defaults.inc et al. trust 
    #     the language setting when calling include() to read
    #     language settings ('int_lang' in more recent versions,
    #     'lang' in older ones).
    foreach var (make_list('int_lang', 'lang')) {
      url = string(dir, "/index.php?", var, "=", file, "%00");
      debug_print("retrieving ", url, "...");
      req = http_get(item:url, port:port);
      res = http_keepalive_send_recv(port:port, data:req);
      if (res == NULL) exit(0);           # can't connect
      debug_print("res =>>", res, "<<.");

      # nb: if successful, file contents will appear between the closing 
      #     HEAD tag and the opening BODY tag, although note that later
      #     versions put a session key there.
      contents = strstr(res, "</HEAD>");
      if (contents != NULL) {
        contents = contents - strstr(contents, "<BODY>");
        debug_print("contents=>>", contents, "<<.");
        # nb: make sure the pattern match agrees with the file retrieved.
        if (contents =~ "New strings") {
          security_message(port);
          exit(0);
        }
      }
    }
  }
}