Cisco Security Advisory
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A vulnerability in the Cisco 7600 Series Route Switch Processor 720 with 10 Gigabit Ethernet Uplinks models RSP720-3C-10GE and RSP720-3CXL-10GE could allow an unauthenticated, remote attacker to cause the route processor to reboot or stop forwarding traffic. The vulnerability is due to an issue in the Kailash field-programmable gate array (FPGA) versions prior to 2.6.
Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are not available.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140326-RSP72010GE
Note: The March 26, 2014, Cisco IOS Software Security Advisory bundled publication includes six Cisco Security Advisories. All advisories address vulnerabilities in Cisco IOS Software. Each Cisco IOS Software Security Advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all Cisco IOS Software vulnerabilities in the March 2014 bundled publication.
Individual publication links are in Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication at the following link:
http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar14.html
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Vulnerable Products
This vulnerability affects only the Cisco 7600 Series Route Switch Processor 720 with 10 Gigabit Ethernet Uplinks models RSP720-3C-10GE and RSP720-3CXL-10GE that have onboard Kailash FPGA versions prior to 2.6 and are running a Cisco IOS Software release that does not contain the fix.
To determine the model of the Cisco 7600 Series Route Switch Processor 720, administrators can log in to the command-line interface (CLI) and issue the show module command. The output will indicate the model of the Cisco 7600 Series Route Switch Processor 720. The following example identifies a Cisco 7600 Series Route Switch Processor 720 with the model number RSP720-3CXL-10GE highlighted in bold text.
To determine the version of the Kailash FPGA, administrators can log in to the device and issue the show asic-version slot <slot number of RSP command>. The following example shows an RSP720 with a KAILASH FPGA version of 2.4:7600#show module
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
1 5 Route Switch Processor 720 10GE (Activ RSP720-3CXL-10GE JAE1219H6CQ
3 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX SAL1231Z8NV
Mod MAC addresses Hw Fw Sw Status
--- ---------------------------------- ------ ------------ ------------ -------
1 001d.4558.f340 to 001d.4558.f347 2.0 12.2(33r)SRC 12.2(33)SRE8 Ok
3 0022.9078.1110 to 0022.9078.113f 3.0 12.2(18r)S1 12.2(33)SRE8 Ok
Mod Sub-Module Model Serial Hw Status
---- --------------------------- ------------------ ----------- ------- -------
1 Policy Feature Card 3 7600-PFC3CXL-10GE JAE1220HV7W 1.1 Ok
1 C7600 MSFC4 Daughterboard 7600-MSFC4 JAE1220IC1F 2.0 Ok
3 Centralized Forwarding Card WS-F6700-CFC SAL1129UYYS 3.1 Ok
Mod Online Diag Status
---- -------------------
1 Pass
3 Pass7600#show asic-version slot 1
Module in slot 1 has 8 type(s) of ASICs
ASIC Name Count Version
KUMA 1 (3.0)
METRO_ARGOS 1 (3.0)
METRO_KRYPTON 1 (3.0)
SSA 2 (9.0)
SANTA_CRUZ 1 (3.0)
TELESTO 1 (7.0)
KAILASH 1 (2.4)
R2D2 2 (3.0)To determine the Cisco IOS Software release that is running on a Cisco product, administrators can log in to the device and issue the show version command to display the system banner. The system banner confirms that the device is running Cisco IOS Software by displaying text similar to "Cisco Internetwork Operating System Software" or "Cisco IOS Software." The image name displays in parentheses, followed by "Version" and the Cisco IOS Software release name. Other Cisco devices do not have the show version command or may provide different output.
The following example identifies a Cisco product that is running Cisco IOS Software Release 15.2(4)M5 with an installed image name of C3900-UNIVERSALK9-M:
Router> show version
Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), 15.2(4)M5, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2013 by Cisco Systems, Inc.
Compiled Fri 13-Sep-13 16:44 by prod_rel_team!--- output truncatedAdditional information about Cisco IOS Software release naming conventions is available in White Paper: Cisco IOS and NX-OS Software Reference Guide.
Products Confirmed Not Vulnerable
A Cisco 7600 Series router with a RSP720-3C-10GE or RSP720-3CXL-10GE that has an onboard Kailash FPGA version 2.6 or later, is not affected, and does not require a Cisco IOS Software upgrade.
The Cisco Catalyst 6500 Series Supervisor Engines are not affected by this vulnerability.
No other Cisco products are currently known to be affected by this vulnerability.
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On RSP720-10GE, the CPUs Route Processor (RP) & Switch Processor (SP) are connected to the Kailash FPGA. These ports are known as the inband ports: RP-inband and SP-inband. In the Cisco 7600 Series platform, a majority of the packets are forwarded by the Encoded Address Recognition Logic (EARL). Packets sent to or from the CPUs include control packets, packets destined for the switch, and packets that cannot be forwarded by the EARL directly.
A vulnerability the Cisco 7600 Series Route Switch Processor 720 with 10 Gigabit Ethernet Uplinks models RSP720-3C-10GE and RSP720-3CXL-10GE with a Kailash FPGA version prior to 2.6, could allow an unauthenticated, remote attacker to cause the route switch processor to reboot or stop forwarding traffic.
The vulnerability is due to an issue in the Kailash FPGA versions prior to 2.6. An attacker could exploit this vulnerability by sending crafted IP packets to or through the affected device. An exploit could allow the attacker to cause the route processor to no longer forward traffic or reboot.
Potential indicators of exploitation will include the Kailash reset message; the module number will reflect the slot of the RSP720-10GE:
Another indicator of exploitation is a hardware test fail message; the module number will reflect the slot of the RSP720-10GE:%PM_SCP-SP-2-LCP_FW_ERR_INFORM: Module 1 is experiencing the following error: TX in-band error. Invoking ka_gmac_reset
The device will reload when the hardware test fails 10 times as shown in the previous error message and will reboot with a %Software-forced reload message.%CONST_DIAG-SP-3-HM_TEST_FAIL: Module 1 TestSPRPInbandPing consecutive failure count:10
This vulnerability can be triggered with IPv4 packets that are destined for or transitioning the Cisco 7600 Series Route Switch Processor. This vulnerability can potentially be triggered using IPv6.
This vulnerability is documented in Cisco bug ID: CSCug84789 (registered customers only). This vulnerability has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2014-2107
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There are no workarounds for the vulnerability described in this Cisco Security Advisory.
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When considering software upgrades, customers are advised to consult the Cisco Security Advisories, Responses, and Notices 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.
In February 2014, Cisco announced details of an industry-wide issue with memory components manufactured by a single supplier between 2005 and 2010. Although the majority of Cisco products that use these components are experiencing field failure rates below expected levels, a device reload or power cycle could expose component failures. While there are no known security implications associated with this issue, a subset of the affected products may experience a memory component failure during the software upgrade process. Cisco recommends customers review the related information and product-specific field notices at www.cisco.com/go/memory before making upgrade decisions. Each Field Notice indicates whether the product could experience the memory component failure during a software upgrade.
Cisco IOS Software
The Cisco IOS Software Checker is the quickest method to determine exposure to vulnerabilities in Cisco IOS Software. The tool allows customers to quickly identify Cisco Security Advisories that impact specific Cisco IOS Software releases. Users can initiate a search by selecting releases from the drop-down menu or uploading a file from their local system. The tool is also capable of parsing show version command output. Results can be customized by searching against all previously published Cisco Security Advisories, a specific publication, or all the advisories in the March 2014 Bundled Publication.
Customers can also use the Cisco IOS Software tables below to determine their exposure. Each row corresponds to a Cisco IOS Software release; if a particular release is vulnerable, the earliest releases that contain the fix are listed in the second column. The third column lists the earliest possible releases that correct all vulnerabilities in this Cisco IOS Software Security Advisory bundled publication.
Expand to View Detailed Fixed Software Information
Cisco IOS XE Software
Cisco IOS XE Software is not affected by the vulnerability that is disclosed in this document.Cisco IOS XR Software
Cisco IOS XR Software is not affected by any of the vulnerabilities that are disclosed in the March 2014 Cisco IOS Software Security Advisory Bundled Publication.
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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.
This vulnerability was discovered when handling customer support requests.
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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 LessRevision 1.0 2014-March-26 Initial public release.
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