Date: 18 February 2016
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AUSCERT External Security Bulletin Redistribution
Cisco 1000 Series Connected Grid Routers SNMP BRIDGE MIB
Denial of Service Vulnerability
18 February 2016
AusCERT Security Bulletin Summary
Product: Cisco 1000 Series Connected Grid Router
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Existing Account
CVE Names: CVE-2016-1333
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Cisco Security Advisory
Cisco 1000 Series Connected Grid Routers SNMP BRIDGE MIB Denial of Service
Advisory ID: cisco-sa-20160216-grid
Published: 2016 February 16 22:00 GMT
Version 1.0: Final
Base - 6.8
Cisco Bug IDs:
A vulnerability in the Simple Network Management Protocol (SNMP) BRIDGE
Management Information Base (MIB) of the Cisco 1000 Series Connected Grid
Routers could allow an authenticated, remote attacker to cause a denial of
service (DoS) condition.
The vulnerability is due to a faulty implementation of certain SNMP Object
Identifiers (OIDs) within the BRIDGE MIB. An SNMP request for certain Object
Identifiers (OIDs) within the BRIDGE MIB can cause the device to reload
unexpectedly. If an attacker knows the SNMP community string, the attacker
could exploit this vulnerability by performing an authenticated SNMP request
of the BRIDGE MIB OID to an affected device. An exploit could allow the
attacker to cause the affected device to reload with each SNMP request,
creating a DoS condition.
Cisco has released not software updates that address this vulnerability.
Workarounds that mitigate this vulnerability are available.
This advisory is available at the following link:
Cisco 1000 Series Connected Grid Router is affected by this vulnerability if
SNMP functionality is configured in the software.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
Indicators of Compromise
Exploitation of this vulnerability will cause an affected device to reload and
generate a core file. Contact the Cisco Technical Assistance Center (TAC) to
review the file and determine whether the device has been compromised by
exploitation of this vulnerability.
Administrator can disable SNMP functionality if it is not required. If SNMP
functionality is required, administrators can discontinue polling BRIDGE MIB
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-February-16
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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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