Products & Services
Support

Product Categories


Popular Downloads


Manage Software

How to Buy

For Home

Linksys Products Store
Linksys is now part of Belkin
Products for everyone

All Ordering Options

Training & Events Partners
Guest

Vulnerability Alert

Cisco Identity Services Engine High CPU Utilization Vulnerability

 
Threat Type:CWE-399: Resource Management Errors
IntelliShield ID:30217
Version:1
First Published:2013 July 25 16:01 GMT
Last Published:2013 July 25 16:01 GMT
Port: Not available
CVE:CVE-2013-3445
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:5.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:4.1
 
 
Version Summary:Cisco Identity Services Engine contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are available.
 
 
Description
A vulnerability in the firewall implementation of Cisco Identity Services Engine could allow an unauthenticated, remote attacker to cause high CPU utilization and possibly the crash of some internal processes.

The vulnerability is due to insufficient implementation of the firewall rule to protect some open ports. An attacker could exploit this vulnerability by flooding the affected system with malformed IP packets.

Cisco has confirmed this vulnerability in a security notice and software updates are available.
 
Warning Indicators
At the time this alert was first published, Cisco Identity Services Engine Software versions 1.1 and prior were vulnerable. Later versions of Cisco Identity Services Engine Software may also be affected.
 
IntelliShield Analysis
To exploit the vulnerability the attacker may need access to trusted internal networks to be able to send large amounts of malformed IP packets to the targeted system. This access requirement may limit 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 a security notice at the following link: CVE-2013-3445

Customers should refer to Cisco bug ID CSCug94572 for the most complete list of affected product versions.
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to cause a targeted device to utilize excessive amounts of CPU resources which could cause some internal processes to crash, resulting in a denial of service (DoS) condition.
 
Technical Information
The vulnerability is due to insufficient implementation of the firewall rule to protect some open ports on an affected device.

An unauthenticated, remote attacker could exploit this vulnerability by sending a series of malformed IP packets to the targeted device. Successful exploitation could cause the targeted device to utilize excessive amounts of CPU resources which could crash some internal processes, resulting in a DoS condition.
 
Safeguards
Administrators are advised to apply the appropriate updates.

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.

To mitigate denial of service attacks, apply hardware rate limiter features to limit packets that require CPU processing. See vendor documentation for specific configuration instructions. For hardware rate limiting configuration details, see Cisco Catalyst 6500 Denial of Service (DoS) Protection Configuration Guide.

Administrators are advised to monitor affected systems.
 
Patches/Software
Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com for assistance.
 
Alert History
 
Initial Release


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
CiscoCisco Identity Services Engine Software 1.0 Base, .4.573 | 1.0 MR Base | 1.1 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.
Powered by  IntelliShield