MyBB Advanced Forum Signatures (afsignatures) Plugin 'signature.php' SQL Injection Vulnerability

# 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:mybb:mybb';

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.802039");
  script_version("2023-07-28T05:05:23+0000");
  script_cve_id("CVE-2011-5277", "CVE-2011-5278");
  script_tag(name:"last_modification", value:"2023-07-28 05:05:23 +0000 (Fri, 28 Jul 2023)");
  script_tag(name:"creation_date", value:"2011-10-14 14:22:41 +0200 (Fri, 14 Oct 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("MyBB Advanced Forum Signatures (afsignatures) Plugin 'signature.php' SQL Injection Vulnerability");
  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2011 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("sw_mybb_detect.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("MyBB/installed");

  script_xref(name:"URL", value:"http://www.exploit-db.com/exploits/17961");
  script_xref(name:"URL", value:"http://packetstormsecurity.org/files/view/105661");
  script_xref(name:"URL", value:"http://mods.mybb.com/view/advanced-forum-signatures");

  script_tag(name:"impact", value:"Successful exploitation will let attackers to manipulate SQL
  queries by injecting arbitrary SQL code and gain sensitive information.");

  script_tag(name:"affected", value:"MyBB Advanced Forum Signatures (afsignatures) Plugin Version
  2.0.4, Other versions may also be affected.");

  script_tag(name:"insight", value:"The flaw is due to input passed via multiple parameters to
  'signature.php', which is not properly sanitised before being used in a SQL query.");

  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:"summary", value:"MyBB with Advanced Forum Signatures (afsignatures) Plugin is prone to an SQL injection (SQLi) vulnerability.");

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

  exit(0);
}

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

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

url = dir + "/signature.php";
postData = "afs_bar_right=postcount''SQLi;--";

req = http_post(item:url, port:port, data:postData);
res = http_send_recv(port:port, data:req);

if("MyBB has experienced an internal SQL error and cannot continue." >< res && "You have an error in your SQL syntax" >< res){
  report = http_report_vuln_url(port:port, url:url);
  security_message(port:port, data:report);
}

exit(0);