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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.1273
       Cisco Unified Communications Manager root Shell Access Local
                    Privilege Escalation Vulnerability
                                12 May 2015

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

Product:           Cisco Unified Communications Manager
Publisher:         Cisco Systems
Operating System:  Cisco
                   VMware ESX Server
Impact/Access:     Root Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-0717  

Original Bulletin: 
   http://tools.cisco.com/security/center/viewAlert.x?alertId=38763

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Vulnerability Alert

Cisco Unified Communications Manager root Shell Access Local Privilege 
Escalation Vulnerability

Threat Type: CWE-264: Permissions, Privileges, and Access Control

IntelliShield ID: 38763

Version: 1

First Published: 2015 May 08 21:01 GMT

Last Published: 2015 May 08 21:01 GMT

Port: Not available

CVE: CVE-2015-0717

Urgency: Unlikely Use

Credibility: Confirmed

Severity: Moderate Damage

CVSS Base: 6.3 CVSS Calculator

CVSS Version 2.0

CVSS Temporal: 5.2

Version Summary: Cisco Unified Communications Manager contains a vulnerability
that could allow an authenticated, local attacker to execute arbitrary 
commands as the root user. Updates are available.

Description

A vulnerability in the local read file of the Cisco Unified Communications 
Manager could allow an authenticated, local attacker to execute commands and 
obtain an interactive Linux shell as the root user.

The vulnerability is due to a failure to properly sanitize user input. An 
attacker could exploit this vulnerability by inserting Linux shell commands 
into a parameter using common techniques. A successful exploit could allow the
attacker to execute any command on the Linux shell as the root user, which 
could result in a complete system compromise.

Cisco has confirmed the vulnerability and released software updates.

Warning Indicators

At the time this alert was first published, Cisco Unified Communications 
Manager 10.0(1.10000.12) was vulnerable. Other releases of Cisco Unified 
Communications Manager may also be affected.

IntelliShield Analysis

To exploit this vulnerability, an attacker must authenticate and have local 
access to the targeted device. These access requirement decreases 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 CSCut19546 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 execute 
arbitrary commands and gain complete access to the underlying operating system
of an affected device by obtaining an interactive Linux shell as the root 
user. A successful exploit could be used to conduct further attacks.

Technical Information

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

An authenticated, local attacker could exploit this vulnerability by inserting
Linux shell commands into a parameter on a targeted device. A successful 
exploit could allow the attacker to execute any command on the Linux shell as
the root user, which 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 Communications Manager 10.0 (1.10000.12)

Associated Products: N/A

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