Cisco IOS XR Software contains a vulnerability that could allow a local attacker to cause a denial of service condition. Updates are not available.
Cisco IOS XR Software is affected by a denial of service (DoS) vulnerability that could allow an authenticated, local attacker to trigger a reload of the affected device by locally generating certain Internet Control Message Protocol (ICMP) messages.
The vulnerability is due to a combination of Silicon Packet Processor (SPP) buffer corruption and a mutex issue when an extended ping with timeout=0 and a large packet size is terminated with Control-C. An attacker could exploit this vulnerability by sending large ICMP packets from an affected device.
Cisco has confirmed this vulnerability in a security notice; however, software updates are not available.
At the time this alert was first published, Cisco IOS XR Software versions 4.3 and prior were vulnerable. Later releases of Cisco IOS XR Software may also be affected.
To exploit this vulnerability, the attacker would need to authenticate locally to the targeted system. This access requirement decreases the likelihood of a successful exploit.
Cisco has released a security notice at the following link: CVE-2013-3464
Customers are advised to consult Cisco bug ID CSCui60347 for the most complete list of affected product versions.
A local attacker could exploit this vulnerability to cause an affected device to reload, resulting in a DoS condition.
The vulnerability is due to a combination of SPP buffer corruption and a mutex issue when an extended ping with timeout=0 and a large packet size is terminated with Control-C.
A local attacker could exploit this vulnerability by generating certain ICMP messages and sending large ICMP packets from an affected device. Successful exploitation could cause a reload of the affected 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 access local systems.
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 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.