Cisco Unified IP Conference Station 7937G contains a vulnerability that could allow an unauthenticated, remote attacker to create a denial of service condition. Updates are not available.
A vulnerability in processing network traffic of the Cisco Unified IP Conference Station 7937G could allow an unauthenticated, remote attacker to create a denial of service (DoS) condition on the affected device.
The vulnerability is due to resource constraints in processing a high rate of network traffic. An attacker could exploit this vulnerability by sending a high rate of TCP packets to the device. An exploit could allow the attacker to render the device unable to communicate on the network until the DoS condition ends.
Cisco has confirmed this vulnerability in a security notice; however, software updates are not available.
At the time this alert was first published, Cisco Unified IP Conference Station 7937G Firmware versions 1.4.4 and prior were vulnerable. Later releases of Cisco Unified IP Conference Station 7937G Firmware may also be affected.
To exploit this vulnerability, an attacker may require access to trusted, internal networks to send a high rate of TCP packets to the affected device. This access requirement could limit the likelihood of a successful exploit.
Cisco indicates through the CVSS score that proof-of-concept exploit code exists; however, the code is not known to be publicly available.
Cisco has released a security notice at the following link: CVE-2013-3435
Customers should refer to Cisco bug ID CSCuh42052 for the most complete list of affected product versions.
An unauthenticated, remote attacker could exploit this vulnerability to cause the targeted device to be unable to communicate on the network, resulting in a DoS condition.
The vulnerability is due to improper use of resources used by the affected software while processing a high rate of network traffic.
An unauthenticated, remote attacker could exploit this vulnerability by sending a high rate of TCP packets to a targeted device. Is successful, the attacker could cause the targeted device to become unavailable to communicate to other devices on the network, 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 Unified IP Conference Station 7937G Firmware
1.4 Base, .1, .2, .3, .4
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.