Cisco 9900 Series IP phones contain a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are available.
A vulnerability in the web application interface of Cisco 9900 series IP phones could allow an unauthenticated, remote attacker to cause the webapp interface to become unavailable.
The vulnerability is due to insufficient input validation of certain fields. An attacker could exploit this vulnerability by overflowing certain input fields. This could allow the attacker to render the webapp interface of the Cisco 9900 series IP phone unavailable.
Cisco has confirmed the vulnerability in a security notice and released software updates.
At the time this alert was first published, Cisco Unified IP Phones 9900 Series Firmware versions 9.3.2 SR1 and prior were vulnerable. Later releases of Cisco Unified IP Phones 9900 Series Firmware may also be vulnerable.
To exploit this vulnerability, an attacker may need access to trusted, internal networks to submit crafted input to a targeted device. This access requirement limits the likelihood of a successful attack.
Cisco has released a security notice at the following link: CVE-2013-5532
Customers are advised to consult Cisco bug ID CSCuh10343 for the most complete list of affected product versions.
An unauthenticated, remote attacker could exploit this vulnerability to cause the webapp interface on an affected device to become unavailable, resulting in a DoS condition.
The vulnerability is due to insufficient input validation of certain fields by the webapp interface used by an affected device.
An unauthenticated, remote attacker could exploit this vulnerability by submitting crafted input designed to overflow certain input fields. If successful, the attacker could cause the webapp interface on the targeted device to become unavailable, resulting in a DoS condition.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
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 firstname.lastname@example.org for assistance.
The security vulnerability applies to the following combinations of products.
Cisco Unified IP Phones 9900 Series Firmware
9.3 Base, .1, .2, .2 SR1
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.