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
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
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
None
C
There is no impact on the confidentiality of the system; the attacker does not gain the ability to read any data.
Integrity
Low
I
Modification of data is possible, but the attacker does not have control over what can be modified, or the extent of what the attacker can affect is limited. The data modified does not have a direct, serious impact on the system.
Availability
None
A
There is no impact on the availability of the system; the attacker does not have the ability to disrupt access to or use of the system.
Below is a copy: Kodi 17.6 Persistent Cross-Site Scripting
=============================================
MGC ALERT 2018-003
- Original release date: March 19, 2018
- Last revised: April 16, 2018
- Discovered by: Manuel Garcia Cardenas
- Severity: 4,8/10 (CVSS Base Score)
- CVE-ID: CVE-2018-8831
=============================================
I. VULNERABILITY
-------------------------
Kodi <= 17.6 - Persistent Cross-Site Scripting
II. BACKGROUND
-------------------------
Kodi (formerly XBMC) is a free and open-source media player software
application developed by the XBMC Foundation, a non-profit technology
consortium. Kodi is available for multiple operating systems and hardware
platforms, with a software 10-foot user interface for use with televisions
and remote controls.
III. DESCRIPTION
-------------------------
Has been detected a Persistent XSS vulnerability in the web interface of
Kodi, that allows the execution of arbitrary HTML/script code to be
executed in the context of the victim user's browser.
IV. PROOF OF CONCEPT
-------------------------
Go to: Playlist -> Create
Create a playlist injecting javascript code:
<img src=x onerror=alert(1)>
The XSS is executed, in the victim browser.
V. BUSINESS IMPACT
-------------------------
An attacker can execute arbitrary HTML or script code in a targeted user's
browser, this can leverage to steal sensitive information as user
credentials, personal data, etc.
VI. SYSTEMS AFFECTED
-------------------------
Kodi <= 17.6
VII. SOLUTION
-------------------------
Vendor include the fix:
https://trac.kodi.tv/ticket/17814
VIII. REFERENCES
-------------------------
https://kodi.tv/
IX. CREDITS
-------------------------
This vulnerability has been discovered and reported
by Manuel Garcia Cardenas (advidsec (at) gmail (dot) com).
X. REVISION HISTORY
-------------------------
March 19, 2018 1: Initial release
April 16, 2018 2: Last revision
XI. DISCLOSURE TIMELINE
-------------------------
March 19, 2018 1: Vulnerability acquired by Manuel Garcia Cardenas
March 19, 2018 2: Send to vendor
March 30, 2018 3: Vendo fix
April 16, 2018 4: Sent to lists
XII. LEGAL NOTICES
-------------------------
The information contained within this advisory is supplied "as-is" with no
warranties or guarantees of fitness of use or otherwise.
XIII. ABOUT
-------------------------
Manuel Garcia Cardenas
Pentester
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