Cisco Security Advisory
Cisco IOS XE Software Packet Processing Denial of Service Vulnerability
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AV:A/AC:L/Au:N/C:N/I:N/A:C/E:F/RL:OF/RC:C
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Cisco IOS XE Software Release 16.1.1 contains a vulnerability that could allow an unauthenticated, adjacent attacker to cause an affected device to reload.
The vulnerability is due to incorrect processing of packets that have a source MAC address of 0000:0000:0000. An attacker could exploit this vulnerability by sending a frame that has a source MAC address of all zeros to an affected device. A successful exploit could allow the attacker to cause the device to reload.
Cisco has released software updates that address this vulnerability. There are no workarounds that mitigate this vulnerability.
This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2015-1221-iosxe
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There are no workarounds that mitigate this vulnerability.
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When considering software upgrades, customers are advised to consult the Cisco Security Advisories and Responses archive at http://www.cisco.com/go/psirt and review subsequent advisories to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to upgrade contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.0 Initial public release. - Final 2015-December-21
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