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AUSCERT External Security Bulletin Redistribution
ESB-2015.1711
Cisco Headend System Releases Denial of Service Vulnerability
30 June 2015
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AusCERT Security Bulletin Summary
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Product: Cisco Headend System Releases
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2015-4227
Original Bulletin:
http://tools.cisco.com/security/center/viewAlert.x?alertId=39555
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Vulnerability Alert
Cisco Headend System Releases Denial of Service Vulnerability
Threat Type: CWE-399: Resource Management Errors
IntelliShield ID: 39555
Version: 1
First Published: 2015 June 29 17:26 GMT
Last Published: 2015 June 29 17:26 GMT
Port: Not available
CVE: CVE-2015-4227
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 CSCus91838 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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