Spiceworks 7.5 TFTP Improper Access Control File Overwrite / Upload

`[+] Credits: John Page AKA HYP3RLINX   
[+] Website: hyp3rlinx.altervista.org  
[+] Source: http://hyp3rlinx.altervista.org/advisories/SPICEWORKS-IMPROPER-ACCESS-CONTROL-FILE-OVERWRITE.txt  
[+] ISR: APPARITIONSEC   
  
  
  
Vendor:  
==================  
www.spiceworks.com  
  
  
  
Product:  
=================  
Spiceworks - 7.5  
  
  
Provides network inventory and monitoring of all the devices on the network by discovering IP-addressable devices.  
It can be configured to provide custom alerts and notifications based on various criteria. it also provides a ticketing system,  
a user portal, an integrated knowledge base, and mobile ticket management.  
  
  
  
Vulnerability Type:  
==============================================  
Improper Access Control File Overwrite / Upload  
  
  
  
CVE Reference:  
==============  
CVE-2017-7237  
  
  
  
Security Issue:  
================  
The Spiceworks TFTP Server, as distributed with Spiceworks Inventory 7.5, allows remote attackers to access the Spiceworks "data\configurations"  
directory by leveraging the unauthenticated nature of the TFTP service for all clients who can reach UDP port 69. This allows remote attackers to  
overwrite files within the Spiceworks configurations directory, if the targeted file name is known or guessed.  
  
Remote attackers who can reach UDP port 69 can also write/upload arbitrary files to the "data\configurations", this can potentially become a  
Remote Code Execution vulnerability if for example an executable file e.g. EXE, BAT is dropped, then later accessed and run by an unknowing  
Spiceworks user.  
  
  
  
  
References - released April 3, 2017:  
====================================  
https://community.spiceworks.com/support/inventory/docs/network-config#security  
  
  
  
Proof:  
=======  
  
1) Install Spiceworks   
2) c:\>tftp -i VICTIM-IP PUT someconfig someconfig  
3) Original someconfig gets overwritten  
  
OR  
  
Arbitrary file upload  
c:\>tftp -i VICTIM-IP PUT Evil.exe Evil.exe  
  
  
  
  
Network Access:  
===============  
Remote  
  
  
  
  
Severity:  
=========  
High  
  
  
  
  
Disclosure Timeline:  
======================================================================  
Vendor Notification: March 13, 2017  
Sent vendor e.g. POC : March 23, 2017  
Request status : March 30, 2017  
Vendor reply: "We are still working on this" March 30, 2017  
Vendor reply :"Thanks for bringing this to our attention"  
and releases basic security note of issue on website : April 3, 2017  
April 5, 2017 : Public Disclosure  
  
  
  
  
[+] 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  
`