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Vulnerability Alert

Cisco Unified Communications Manager SCCP Packet Processing Denial of Service Vulnerability

 
Threat Type:CWE-399: Resource Management Errors
IntelliShield ID:20000
Version:1
First Published:2010 March 03 16:17 GMT
Last Published:2010 March 03 16:17 GMT
Port: 2000, 2443
CVE:CVE-2010-0588
BugTraq ID:38501
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:7.8 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:6.4
Related Resources:
View related Security AdvisoryView related Applied Mitigation Bulletin
 
 
Version Summary:

Cisco Unified Communications Manager contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition.? Updates are available.

 
 
Description

Cisco Unified Communications Manager versions prior to 6.1(5), prior to 7.1(3a)su1, and prior to 8.0(1) contain a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.

The vulnerability is due to errors in processing Skinny Client Control Protocol (SCCP) packets.? An unauthenticated, remote attacker could exploit the vulnerability by sending a malicious SCCP packet to the targeted system.? If an exploit is successful, the attacker could cause portions of the software to fail, resulting in a DoS condition.

Cisco has confirmed this vulnerability in a security advisory and released updated software.

 
Warning Indicators

The following Cisco Unified Communications Manager versions are vulnerable:

Versions prior to 6.1(5)
Versions prior to 7.1(3a)su1
Versions prior to 8.0(1)

 
IntelliShield Analysis

To exploit the vulnerability, an attacker must be able to send an SCCP request to the targeted system.? The attacker may require access to trusted network segments to send network requests to the system.? In some cases, the Cisco Unified Communications Manager system may be present on separate physical or logical networks, making network access difficult and increasing the complexity of an attack.

If an exploit is successful, the attacker could cause services on the Cisco Unified Communications Manager software to fail.? Users may not be able to place additional calls or access other resources, interrupting operations.? An administrator may need to intervene and restart the software manually.

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 Cisco bug ID CSCtc47823 at the following link: cisco-sa-20100303-cucm

 
Impact

An unauthenticated, remote attacker could exploit this vulnerability to cause Cisco Unified Communications Manager services to fail, resulting in the interruption of voice services provided by the affected system.

 
Technical Information

The vulnerability is due to errors in processing SCCP packets by the Cisco Unified Communications Manager software.? An unauthenticated, remote attacker could exploit the vulnerability by sending a malicious network packet to the targeted system.? The software may accept SCCP packets via TCP and UDP ports in the 2000 to 2443 range.? Processing the malicious network messages could cause application processes to terminate, resulting in a DoS condition.

 
Safeguards

Administrators are advised to apply the appropriate updates.

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

Administrators may consider filtering TCP ports 2000 through 2443 to allow access only to networks that require access to the Cisco Unified Communications Manager system.

Administrators are advised to implement an intrusion prevention system (IPS) or intrusion detection system (IDS) to help detect and prevent attacks that attempt to exploit this vulnerability.

Administrators are advised to monitor critical 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: cisco-amb-20100303-cucm?

 
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 e-mail at tac@cisco.com.

 
Alert History
 

Initial Release



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

Primary Products:
CiscoCisco Unified Communications Manager 6.1 (1), (1a), (1b), (2), (2)SU1, (2)SU1a, (3), (4) | 7.1 Base, (3) | 8.0 Base

Associated Products:
N/A




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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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