Date: 14 March 2016
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AUSCERT External Security Bulletin Redistribution
Cisco Gigabit Switch Router 12000 Series Routers Denial of
14 March 2016
AusCERT Security Bulletin Summary
Product: Cisco Gigabit Switch Router 12000 Series Routers
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2016-1361
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Cisco Security Advisory
Cisco Gigabit Switch Router 12000 Series Routers Denial of Service
2016 March 11 14:49 GMT
Base - 4.6
Cisco Bug IDs:
A vulnerability in the ASIC UDP ingress receive function of Cisco Gigabit
Switch Router (GSR) 12000 Series Routers could allow an unauthenticated,
remote attacker to cause a partial denial of service (DoS) condition when one
line card in the router unexpectedly restarts.
The vulnerability is due to improper input validation for the presence of
a Bidirectional Forwarding Detection (BFD) header on the UDP packet. An
attacker could exploit this vulnerability by sending a crafted UDP packet with
a specific UDP port range to the affected device. An exploit could allow the
attacker to cause a partial denial of service condition when a line card
Cisco has released software updates that address this vulnerability.
Workarounds that address this vulnerability are available.
This advisory is available at the following link:
All releases of Cisco IOS XR for Cisco GSR 12000 Series Routers are
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
An access-control list (ACL) can be applied to the incoming interface to
block the offending packets.
Information about fixed software is documented in the 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 solution.
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-March-11
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FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR
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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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