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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.1784
       Cisco Headend System Releases Denial of Service Vulnerability
                                8 July 2015

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

Product:           Cisco Headend System Releases
Publisher:         Hewlett-Packard
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2015-4230  

Original Bulletin: 
   http://tools.cisco.com/security/center/viewAlert.x?alertId=39562

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Vulnerability Alert

Cisco Headend System Releases Denial of Service Vulnerability

Threat Type: CWE-399: Resource Management Errors

IntelliShield ID: 39562

Version: 1

First Published: 2015 June 29 16:52 GMT

Last Published: 2015 June 29 16:52 GMT

Port: Not available

CVE: CVE-2015-4230

Urgency: Unlikely Use 

Credibility: Confirmed 

Severity: Mild Damage

CVSS Base: 5.0

CVSS Version 2.0

CVSS Temporal: 4.8

Version Summary: Cisco Headend System Releases contain a vulnerability that 
could allow an unauthenticated, remote attacker to cause a denial of service 
condition. Updates are not available.

Description

A vulnerability in Cisco Headend System Releases could allow an 
unauthenticated, remote attacker to cause a denial of service (DoS) condition.

The vulnerability is due to the software's inability to recover memory after 
certain usage situations. An attacker could exploit this vulnerability by 
exploiting memory usage, resulting in a DoS condition.

Cisco has confirmed the vulnerability; however, software updates are not 
available.

Warning Indicators

Cisco Headend System Releases are affected.

IntelliShield Analysis

To exploit this vulnerability, an attacker may need access to trusted, 
internal networks to send crafted content to the affected device. This access
requirement 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 CSCus91854 for registered users, which contains 
additional details and an up-to-date list of affected product versions.

Impact

An unauthenticated, remote attacker could exploit this vulnerability to 
consume excessive amounts of memory resources, resulting in a DoS condition.

Technical Information

The vulnerability is due to improper handling of memory by the affected 
software.

An unauthenticated, remote attacker could exploit this vulnerability by 
sending crafted content to a targeted device. An exploit could allow the 
attacker to consume excessive amounts of memory resources, resulting in a DoS
condition.

Safeguards

Administrators are advised to contact the vendor regarding future updates and
releases.

Administrators are advised to allow only trusted users to have network access.

Administrators may consider using IP-based access control lists (ACLs) to 
allow only trusted systems to access the affected systems.

Administrators are advised to monitor affected systems.

Patches/Software

Software updates are not available.

Alert History

Initial Release

Product Sets

The security vulnerability applies to the following combinations of products.

Primary Products:

Cisco Headend System Releases Original Release Base

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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