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Cisco MARS Default Administrative Password
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SUMMARY
Cisco Security Monitoring, Analysis and Response System (CS-MARS) is "a
security system that receives event logs from various network devices,
correlates and analyzes the received data for security problems and
reports the findings. In addition, CS-MARS can perform automated tasks to
mitigate security problems. All CS-MARS appliances ship with a default
password set for the undocumented administrative account root".
Successful exploitation of the vulnerability in CS-MARS will result in an
attacker gaining full administrative privileges on the CS-MARS device.
DETAILS
Vulnerable Systems:
* CS-MARS version 4.1.2 and prior
Immune Systems:
* CS-MARS version 4.1.3
The Cisco Security Monitoring, Analysis and Response System (CS-MARS)
software contains a default password for an undocumented administrative
account. This password is set, without any user intervention, during
installation of the software used by CS-MARS appliances, and is the same
in all installations of the product. Users must be authenticated to the
CS-MARS command line in order to utilize the default password to access
the administrative account.
This privileged account is intended to be used only by authorized Cisco
development engineers for advanced debugging purposes. No direct remote
access to the root account is permitted. In order to access a privileged
system shell, users must first successfully login into the CS-MARS system
administration command line interface with the "pnadmin" account. Once
authenticated, the root account can be accessed with the undocumented
command "expert".
Prior to CS-MARS version 4.1.3, users do not have a method to modify the
root password. CS-MARS versions 4.1.3 and later provide the command
"passwd expert", which allow users to modify a portion of the root
password providing additional security. The selected user password is
combined with a Cisco controlled component to form a new root password.
After performing this step, neither Cisco personnel or the user can access
the root account without knowledge of both components used to create the
root password. When authorized Cisco development engineers need access to
the root account for advanced debugging, both Cisco and the user will need
to enter their portion of the configured root password to enable access.
Workaround:
To verify the version of CS-MARS software, use a SSH client to login into
the system administration command line interface with pnadmin account and
execute the version command.
prompt$ ssh pnadmin@192.168.1.1
pnadmin@192.168.1.1's password:
Last login: Fri Dec 30 15:19:14 2005 from 192.168.1.2
CS MARS - Mitigation and Response System
? for list of commands
[pnadmin]$ version
4.1.2 (2042)
The vulnerability described in this advisory can be mitigated by first
upgrading the software on CS-MARS appliances to version 4.1.3 and then
using the "passwd expert" command to modify the root password.
CS-MARS appliances can be upgraded via the HTTPS management interface or
system administration command line. Please refer to the CS-MARS product
documentation for instructions on how to upgrade the software.
While the documentation refers to CS-MARS 4.x versions, the instructions
are also applicable to CS-MARS 3.x versions.
<http://www.cisco.com/en/US/products/ps6241/products_installation_guide_chapter09186a00804c4db4.html#wp1133308>
http://www.cisco.com/en/US/products/ps6241/products_installation_guide_chapter09186a00804c4db4.html#wp1133308
Once a CS-MARS appliance is upgraded to version 4.1.3, the root password
can be modified using the "passwd expert" command. Using a SSH client,
login into the CS-MARS system administration interface with the "pnadmin"
account and use the "passwd expert" command to select a new password. The
selected password must be at least six characters long.
prompt$ ssh pnadmin@192.168.1.1
pnadmin@192.168.1.1's password: Last
login: Fri Dec 30 19:45:51 2005 from 192.168.1.2
CS MARS - Mitigation and Response System
? for list of commands
[pnadmin]$ passwd expert
New password:
Retype new password:
ADDITIONAL INFORMATION
The information has been provided by <mailto:psirt@cisco.com> Cisco
Systems.
The original article can be found at:
<http://www.cisco.com/warp/public/707/cisco-sa-20060111-mars.shtml>
http://www.cisco.com/warp/public/707/cisco-sa-20060111-mars.shtml
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