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AUSCERT External Security Bulletin Redistribution
Cisco IOS XR for NCS6000 Series Devices OSPF Packet
Processing Denial of Service Vulnerability
15 September 2016
AusCERT Security Bulletin Summary
Product: Cisco NCS6000 series devices
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2016-1433
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Cisco IOS XR for NCS6000 Series Devices OSPF Packet Processing Denial of
2016 September 14 16:00 GMT
No workarounds available
Cisco Bug IDs:
Base 5.0, Temporal 4.1
A vulnerability in the OSPFv3 processing of Cisco IOS XR for Cisco CRS
platforms could allow an unauthenticated, remote attacker to cause a reload of
the OSPFv3 process and result in a limited denial of service (DoS) condition
on the affected device.
The vulnerability is due to insufficient logic in the processing of crafted
OSPFv3 packets. An attacker could exploit this vulnerability by sending
crafted OSPFv3 packets to be processed by an affected device. An exploit could
allow the attacker to cause a reload of the OSPFv3 process and cause a limited
DoS condition on the affected device.
Cisco has released software updates that address this vulnerability.
Workarounds that address this vulnerability are not available.
This advisory is available at the following link:
Cisco 64-bit releases of IOS XR for Cisco NCS6000 series devices are affected
by this vulnerability.
Only 64-bit NCS6k platforms are affected. A device is vulnerable if it is
configured to process OSPFv3. Exploiting a vulnerability against an affected
device results in a crash of the OSPFv3 process, followed by a potential
effect on data traffic relying on the exchanged routes.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
There are no workarounds that address this vulnerability.
Cisco provides information about fixed software in Cisco bugs, which are
accessible through the Cisco Bug Search Tool.
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
In all cases, customers should ensure that the devices to be upgraded 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.
Exploitation and Public Announcements
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.
Version Description Section Status Date
1.0 Initial public release. Final 2016-September-14
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF
GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS
LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO
CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information or
contain factual errors. The information in this document is intended for end
users of Cisco products.
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