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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.1571
         Cisco UCS Central Software Command-Line Interface Command
                          Injection Vulnerability
                               16 June 2015

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco Unified Computing System Central Software
Publisher:         Cisco Systems
Operating System:  VMware ESX Server
                   KVM
                   Microsoft Hyper-V
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Increased Privileges            -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-4183  

Original Bulletin: 
   http://tools.cisco.com/security/center/viewAlert.x?alertId=39324

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Vulnerability Alert Cisco UCS Central Software Command-Line Interface Command
Injection Vulnerability

Threat Type: CWE-78: OS Command Injections

IntelliShield ID: 39324

Version: 1

First Published: 2015 June 15 18:57 GMT

Last Published: 2015 June 15 18:57 GMT

Port: Not available

CVE: CVE-2015-4183

Urgency: Unlikely Use

Credibility: Confirmed

Severity: Mild Damage

CVSS Base: 6.8

CVSS Version 2.0

CVSS Temporal: 5.6

Version Summary: Cisco UCS Central Software contains a vulnerability that 
could allow an authenticated, local attacker to inject and execute arbitrary 
commands on the underlying operating system. Updates are available.

Description

A vulnerability in the command-line interface (CLI) of Cisco UCS Central 
Software could allow an authenticated, local attacker to inject arbitrary 
commands that are executed with elevated privileges on the underlying 
operating system.

The vulnerability is due to insufficient input validation. An attacker could 
exploit this vulnerability by authenticating to the device and submitting 
crafted commands to the affected parameter in the CLI. An exploit could allow
the attacker to read, write, and overwrite any file on the system or execute 
arbitrary code.

Cisco has confirmed the vulnerability and released software updates.

Warning Indicators

At the time this alert was first published, Cisco UCS Central Software version
1.2(1a) was vulnerable. Later versions of Cisco UCS Central Software may also
be vulnerable.

IntelliShield Analysis

To exploit this vulnerability, an attacker must authenticate and have local 
access to an affected device. These requirements may reduce the likelihood of
a successful exploit.

Cisco indicates through the CVSS score that functional exploit code exists; 
however, the code is not known to be publicly available.

Vendor Announcements

Cisco has released bug ID CSCut32795 for registered users, which contains 
additional details and an up-to-date list of affected product versions.

Impact

An authenticated, local attacker could exploit this vulnerability to inject 
and execute arbitrary commands with elevated privileges on the underlying 
operating system. A successful exploit could result in a complete system 
compromise.

Technical Information

The vulnerability is due to insufficient validation of user-supplied input 
processed by an affected device.

An attacker could exploit this vulnerability by authenticating to the device 
and submitting crafted commands to the affected parameter in the CLI. An 
exploit could allow the attacker to read, write, and overwrite any file on the
system or execute arbitrary code. A successful exploit could result in a 
complete system compromise.

Safeguards

Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to access local 
systems.

Administrators are advised to allow only privileged users to access 
administration or management systems.

Administrators are advised to monitor affected systems.

Patches/Software

Cisco customers with active contracts can obtain updates through the Software
Center at the following link: Cisco. Cisco customers without contracts can 
obtain upgrades by contacting the Cisco Technical Assistance Center at 
1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com.

Alert History

Initial Release

Product Sets

The security vulnerability applies to the following combinations of products.

Primary Products:

Cisco Cisco Unified Computing System Central Software 1.2 (1a)

Associated Products:

N/A

Alerts and bulletins on the Cisco Security Intelligence Operations Portal are
highlighted by analysts in the Cisco Threat Operations Center and represent a
subset of the comprehensive content that is available through Cisco Security 
IntelliShield Alert Manager Service. This customizable threat and 
vulnerability alert service provides security staff with access to timely, 
accurate, and credible information about threats and vulnerabilities that may
affect their environment.

LEGAL DISCLAIMER

The urgency and severity ratings of this alert are not tailored to individual
users; users may value alerts differently based upon their network 
configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED 
THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF 
GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED 
THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION
IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE
TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES 
THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.

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