Cisco Security Advisory
Cisco cBR-8 Series Converged Broadband Router SNMP Denial of Service Vulnerability
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AV:N/AC:L/Au:S/C:N/I:N/A:C/E:F/RL:OF/RC:C
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A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS XE Software running on Cisco cBR-8 Series Converged Broadband Routers could allow an authenticated, remote attacker to cause a denial of service (DoS) condition.
The vulnerability exists because the affected platform does not properly trap SNMP read requests for a specific object ID that is not supported by the platform. When such a request is processed, the SNMP process may attempt to reference a pointer with a NULL value. To exploit this vulnerability, an attacker who can authenticate to an affected device may submit a specific, valid SNMP request. A successful exploit will cause the supervisor card that serviced the request to restart, due to an attempt to access an invalid memory region, and result in a DoS condition.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160617-cbr
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Vulnerable Products
This vulnerability affects Cisco cBR-8 Series Converged Broadband Routers that are running Cisco IOS XE Software Release 3.15S or 3.16S prior to the first fixed software release.Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this vulnerability.
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There are no workarounds that address this vulnerability.
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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 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 2016-June-17
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