Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are available.
A vulnerability in the content scanning module of Cisco IOS Software could allow an unauthenticated, remote attacker to cause a reload of the affected device.
The vulnerability occurs when processing HTTPS packets that need to be redirected to a ScanSafe tower. An attacker could exploit this vulnerability by sending HTTPS packets to be redirected to a ScanSafe tower. An exploit could allow the attacker to cause a reload of the affected device.
Cisco has confirmed the vulnerability in a security notice and released software updates.
At the time this alert was first published, Cisco IOS Software Release 15.3(3)M is vulnerable. Later releases may also be vulnerable.
To exploit this vulnerability, an attacker may need access to trusted, internal networks in which the targeted device may reside to send HTTPS packets to a targeted device. This access requirement may reduce the likelihood of a successful exploit.
Cisco has released a security notice at the following link: CVE-2014-3263
Customers are advised to consult Cisco bug ID CSCum97038 for a complete list of affected product versions.
An unauthenticated, remote attacker could exploit this vulnerability to cause an affected device to reload, resulting in a denial of service (DoS) condition.
The vulnerability is due to improper processing of HTTPS packets that need to be redirected to a ScanSafe tower.
An unauthenticated, remote attacker could exploit this vulnerability by sending HTTPS packets to be redirected to a ScanSafe tower. An exploit could allow the attacker to cause a reload of the affected device, 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 can help protect affected systems from external attacks by using a solid firewall strategy.
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.
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.