Cisco Hosted Collaboration Solution contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are not available.
A vulnerability in the network stack of Cisco Hosted Collaboration Mediation could allow an unauthenticated, remote attacker to cause excessive CPU utilization on the affected system.
The vulnerability is due to insufficient optimization of resources when the affected system is flooded with malformed UDP packets. An attacker could exploit this vulnerability by sending malformed UDP packets to UDP port 162 of the affected system. A successful exploit could allow the attacker to cause excessive CPU utilization on the affected system. CPU utilization returns to a normal state once the attack is terminated.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
At the time this alert was first published, Cisco Hosted Collaboration Solution version 9 is affected. Later releases of Cisco Hosted Collaboration Solution may also be affected.
To exploit this vulnerability, the attacker may need access to a trusted, internal network to send malformed UDP packets to the targeted device. This access requirement decreases the likelihood of a successful exploit.
Customers are advised to review the bug reports in the "Vendor Announcements" section for a current list of affected versions.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
An unauthenticated, remote attacker could exploit this vulnerability to cause excessive CPU utilization on an affected device, resulting in a denial of service (DoS) condition.
The vulnerability is due to insufficient optimization of resources by an affected device when flooded with malformed UDP packets.
An unauthenticated, remote attacker could exploit this vulnerability by sending malformed UDP packets to UDP port 162 of the targeted device. Successful exploitation could cause excessive CPU utilization on the device, resulting in a DoS condition.
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.
The security vulnerability applies to the following combinations of products.
Cisco Hosted Collaboration Solution
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.