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Cisco Security Advisory: Cisco IOS Software Crafted Network Time Protocol Packets Denial of Service Vulnerability
- To: bugtraq@xxxxxxxxxxxxxxxxx
- Subject: Cisco Security Advisory: Cisco IOS Software Crafted Network Time Protocol Packets Denial of Service Vulnerability
- From: Cisco Systems Product Security Incident Response Team <psirt@xxxxxxxxx>
- Date: Thu, 4 Aug 2016 12:23:56 -0400
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Cisco Security Advisory: Cisco IOS Software Crafted Network Time Protocol
Packets Denial of Service Vulnerability
Advisory ID: cisco-sa-20160804-wedge
Revision 1.0
For Public Release 2016 August 4 16:00 GMT
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Summary
=======
A vulnerability in the processing of Network Time Protocol (NTP) packets by
Cisco IOS could allow an unauthenticated, remote attacker to cause an interface
wedge and an eventual denial of service (DoS) condition on the affected device.
The vulnerability is due to insufficient checks on clearing the invalid NTP
packets from the interface queue. An attacker could exploit this vulnerability
by sending a number of crafted NTP packets to be processed by an affected
device. An exploit could allow the attacker to cause an interface wedge and an
eventual denial of service (DoS) condition on the affected device.
Cisco released software updates that address this vulnerability. There are no
workarounds that address this vulnerability; however, there is a mitigation for
this vulnerability.
This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160804-wedge
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