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Vulnerability Alert

Cisco IPS Control-Plane MainApp Denial of Service Vulnerability

 
Threat Type:CWE: Insufficient Information
IntelliShield ID:32839
Version:1
First Published:2014 February 19 16:26 GMT
Last Published:2014 February 19 16:26 GMT
Port: Not available
CVE:CVE-2014-0719
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:7.8 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:6.8
 
Version Summary:Cisco IPS Software contains a vulnerability in the implementation of the control-plane access list that could allow an unauthenticated, remote attacker to cause the MainApp process to become unresponsive on a targeted device. Updates are available.
 
 
Description
A vulnerability in the implementation of the control-plane access list of the Cisco IPS Software could allow an unauthenticated, remote attacker to cause the MainApp process to become unresponsive.

The vulnerability is due to a failure to properly handle malformed TCP packets sent to the management IP address of the affected system. An attacker could exploit this vulnerability by sending crafted TCP packets to TCP port 7000 of the IP address of the management interface. An exploit could allow the attacker to make the MainApp process unresponsive. This creates a denial of service (DoS) condition because the Cisco IPS sensor is not able to execute several critical tasks including alert notification, event store management, and sensor authentication. The Cisco IPS web server will also be unavailable while the MainApp process is unresponsive. Additionally, due to this general system failure, other processes such as the Analysis Engine may not work properly.

Cisco has confirmed the vulnerability in a security advisory and has released software updates.
 
Warning Indicators
The following products are affected:
  • Cisco ASA 5505 Advanced Inspection and Prevention Security Services Card (AIP SSC)
  • Cisco ASA 5500 Series Advanced Inspection and Prevention Security Services Module (AIP SSM)
  • Cisco ASA 5500-X Series IPS Security Services Processor (IPS SSP) software and hardware modules
 
IntelliShield Analysis
To exploit this vulnerability, an attacker may require access to trusted, internal networks to send crafted requests to the affected software. This access requirement could 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 advisory for bug ID CSCui67394 at the following link: cisco-sa-20140219-ips
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to make the MainApp process unresponsive and creates a DoS condition because the Cisco IPS sensor is not able to execute several critical tasks including alert notification, event store management, and sensor authentication. The Cisco IPS web server will also be unavailable while the MainApp process is unresponsive. Additionally, due to this general system failure, other processes such as the Analysis Engine may not work properly.
 
Technical Information
The vulnerability is due to a failure to properly handle malformed TCP packets sent to the management IP address of the affected system. An unauthenticated, remote attacker could exploit this vulnerability by sending crafted TCP packets directed to TCP port 7000 of the IP address of the management interface. Transit traffic will not trigger the vulnerability. An exploit could allow the attacker to make the MainApp process unresponsive. This creates a DoS condition because the Cisco IPS sensor is not able to execute several critical tasks including alert notification, event store management, and sensor authentication. The Cisco IPS web server will also be unavailable while the MainApp process is unresponsive. In addition, due to this general system failure, other processes such as the Analysis Engine may not work properly. If the Cisco IPS is configured in promiscuous mode, mitigation actions that require MainApp processing such as shun or rate-limit may be unavailable. If the Cisco IPS is configured in inline mode, the sensor may not correctly perform inspection and mitigation actions because the Analysis Engine process may not work properly.
 
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.

Administrators are advised to monitor affected systems.

The Cisco Applied Intelligence team has created the following companion document to guide administrators in identifying and mitigating attempts to exploit this vulnerability prior to applying updated software: Mitigation and Identification of Multiple Vulnerabilities in Cisco IPS Software
 
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:
CiscoIntrusion Prevention System (IPS) 6.1 Base | 7.0 Base, (1)E3, (2)E3, (2)E4, (4)E4, (6)E4, (7)E4, (8)E4, (9)E4 | 7.1 Base, (1)E4, (2)E4, (3)E4, (4)E4, (5)E4, (6)E4, (7)E4, (8)E4 | 7.2 (1)E4

Associated Products:
N/A




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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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