Summary

• The Smart Install client feature in Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
  
  Affected devices that are configured as Smart Install clients are vulnerable.
  
  Cisco has released software updates that address this vulnerability. There are no workarounds for devices that have the Smart Install client feature enabled.
  
  This advisory is available at the following link:
  
  http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130327-smartinstall
  
  

  Note: The March 27, 2013, Cisco IOS Software Security Advisory bundled publication includes seven 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 2013 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_mar13.html

  
  

Affected Products

• 
  

  Vulnerable Products

  Cisco devices that have affected Cisco IOS Software with the Smart Install client feature enabled are vulnerable.
  
  To determine if a Cisco IOS device is configured with the Smart Install client feature enabled, use the show vstack config privileged EXEC command on the Smart Install client. The following is the output of the show vstack config command in a Cisco Catalyst Switch configured as a Smart Install client:
  
  switch#show vstack config   Role: Client  Vstack Director IP address: 10.1.1.100
  Note: Smart Install client functionality is enabled by default on Cisco IOS switches.
  
  Note: Cisco devices that are configured as a Smart Install director are not affected by this vulnerability. The Role: Client in the output from the show vstack config command, confirms the feature is enabled on the device.
  
  

  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 15.0(1)M1 with an installed image name of C3900-UNIVERSALK9-M:

  Router> show version 
  Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1)
  Technical Support: http://www.cisco.com/techsupport
  Copyright (c) 1986-2009 by Cisco Systems, Inc.
  Compiled Wed 02-Dec-09 17:17 by prod_rel_team

  !--- output truncated 

  Additional information about Cisco IOS Software release naming conventions is available in "White Paper: Cisco IOS and NX-OS Software Reference Guide" at http://www.cisco.com/web/about/security/intelligence/ios-ref.html.

  
  

  Products Confirmed Not Vulnerable

  Cisco IOS XR Software is not affected by this vulnerability.

  Cisco IOS XE Software is not affected by this vulnerability.

  No other Cisco products are currently known to be affected by this vulnerability.

Details

• The Smart Install client feature in Cisco IOS Software is a plug-and-play configuration and image-management feature that provides zero-touch deployment for new switches. The feature allows a customer to ship a Cisco switch to any location, install it in the network, and power it on without additional configuration requirements.
  
  The Smart Install client feature in Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The Smart Install client feature uses TCP port 4786 for communication. An established TCP connection with a successful TCP three-way handshake is required to exploit this vulnerability.
  
  The vulnerability is due to incorrect handling of image list parameters. An attacker could exploit this vulnerability by sending crafted Smart Install packets to TCP port 4786. A successful exploit could cause a Cisco Catalyst switch to reload, resulting in a DoS condition.
  
  This vulnerability is documented in Cisco bug ID CSCub55790 (registered customers only), and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2013-1146.
  

Workarounds

• There are no workarounds available to mitigate this vulnerability other than disabling the Smart Install feature. The Smart Install Feature is enabled by default on client switches. No configuration is needed in the client switches.
  
  In certain versions of Cisco IOS Software, the Smart Install client feature can be disabled with the global configuration command no vstack. In certain versions of Cisco IOS Software where the command is available, the vulnerability can be mitigated by disabling the Smart Install client feature.
  
  The following is the output of the show vstack config command in a Cisco Catalyst Switch with Smart Install client feature disabled:
  
  switch#show vstack config   Role: Client (SmartInstall disabled)   Vstack Director IP address: 10.1.1.100
  
  Note: The no vstack global configuration command to disable the Smart Install client feature was introduced with the fix for Cisco bug CSCtj75729 ("Ability to shut Smart Install default service on TCP port 4786"). If a Cisco IOS Software release supports the Smart Install client feature but the no vstack command does not exist, the release does not contain the fix for Cisco bug CSCtj75729.
  
  Additional mitigations that can be deployed on Cisco devices within the network are available in the companion document "Identifying and Mitigating Exploitation of the Cisco IOS Software Smart Install Denial of Service Vulnerability," which is available at http://tools.cisco.com/security/center/viewAMBAlert.x?alertId=28655.
  
  

Fixed Software

• 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.
  
  

  Cisco IOS Software

  Each row of the following Cisco IOS Software table corresponds to a Cisco IOS Software train. If a particular train is vulnerable, the earliest releases that contain the fix are listed in the First Fixed Release column. The First Fixed Release for All Advisories in the March 2013 Bundled Publication column lists the earliest possible releases that correct all the published vulnerabilities in the Cisco IOS Software Security Advisory bundled publication. Cisco recommends upgrading to the latest available release where possible.

  The Cisco IOS Software Checker allows customers to search for Cisco Security Advisories that address specific Cisco IOS Software releases. This tool is available on the Cisco Security (SIO) portal at http://tools.cisco.com/security/center/selectIOSVersion.x

  Major Release	Availability of Repaired Releases
  Affected 12.0-Based Releases	First Fixed Release	First Fixed Release for All Advisories in the March 2013 Bundled Publication
  There are no affected 12.0 based releases
  Affected 12.2-Based Releases	First Fixed Release	First Fixed Release for All Advisories in the March 2013 Bundled Publication
  12.2	Not vulnerable	Not vulnerable
  12.2B	Not vulnerable	Not vulnerable
  12.2BC	Not vulnerable	Not vulnerable
  12.2BW	Not vulnerable	Not vulnerable
  12.2BX	Not vulnerable	Not vulnerable
  12.2BY	Not vulnerable	Not vulnerable
  12.2BZ	Not vulnerable	Not vulnerable
  12.2CX	Not vulnerable	Not vulnerable
  12.2CY	Not vulnerable	Not vulnerable
  12.2CZ	Not vulnerable	Not vulnerable
  12.2DA	Not vulnerable	Not vulnerable
  12.2DD	Not vulnerable	Not vulnerable
  12.2DX	Not vulnerable	Not vulnerable
  12.2EU	Not vulnerable	Not vulnerable
  12.2EW	Not vulnerable	Vulnerable; First fixed in Release 12.2SG Releases up to and including 12.2(20)EW4 are not vulnerable.
  12.2EWA	Not vulnerable	Vulnerable; First fixed in Release 12.2SG Releases up to and including 12.2(20)EWA4 are not vulnerable.
  12.2EX	Vulnerable; First fixed in Release 15.0SE Releases up to and including 12.2(53)EX are not vulnerable.	Vulnerable; First fixed in Release 15.0SE Releases up to and including 12.2(37)EX are not vulnerable.
  12.2EY	Vulnerable; migrate to any release in 15.1EY Releases up to and including 12.2(53)EY are not vulnerable.	Vulnerable; First fixed in Release 15.2S
  12.2EZ	Vulnerable; First fixed in Release 15.0SE Releases up to and including 12.2(53)EZ are not vulnerable.	Vulnerable; First fixed in Release 15.0SE
  12.2FX	Not vulnerable	Vulnerable; First fixed in Release 15.0SE
  12.2FY	Not vulnerable	Vulnerable; First fixed in Release 15.0SE
  12.2FZ	Not vulnerable	Vulnerable; First fixed in Release 15.0SE
  12.2IRA	Not vulnerable	Vulnerable; First fixed in Release 12.2SRE
  12.2IRB	Not vulnerable	Vulnerable; First fixed in Release 12.2SRE
  12.2IRC	Not vulnerable	Vulnerable; First fixed in Release 12.2SRE
  12.2IRD	Not vulnerable	Vulnerable; First fixed in Release 12.2SRE
  12.2IRE	Not vulnerable	Vulnerable; First fixed in Release 12.2SRE
  12.2IRF	Not vulnerable	Vulnerable; First fixed in Release 12.2SRE
  12.2IRG	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  12.2IRH	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  12.2IRI	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  12.2IXA	Not vulnerable	Not vulnerable
  12.2IXB	Not vulnerable	Not vulnerable
  12.2IXC	Not vulnerable	Not vulnerable
  12.2IXD	Not vulnerable	Not vulnerable
  12.2IXE	Not vulnerable	Not vulnerable
  12.2IXF	Not vulnerable	Not vulnerable
  12.2IXG	Not vulnerable	Not vulnerable
  12.2IXH	Not vulnerable	Not vulnerable
  12.2JA	Not vulnerable	Not vulnerable
  12.2JK	Not vulnerable	Not vulnerable
  12.2MB	Not vulnerable	Not vulnerable
  12.2MC	Not vulnerable	Not vulnerable
  12.2MRA	Not vulnerable	Vulnerable; First fixed in Release 12.2SRE
  12.2MRB	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  12.2S	Not vulnerable	Vulnerable. Only releases 12.2(25)S through 12.2(25)S15 are vulnerable
  12.2SB	Not vulnerable	12.2(33)SB12
  12.2SBC	Not vulnerable	Vulnerable; First fixed in Release 12.2SB
  12.2SCA	Not vulnerable	Vulnerable; First fixed in Release 12.2SCF
  12.2SCB	Not vulnerable	Vulnerable; First fixed in Release 12.2SCF
  12.2SCC	Not vulnerable	Vulnerable; First fixed in Release 12.2SCF
  12.2SCD	Not vulnerable	Vulnerable; First fixed in Release 12.2SCF
  12.2SCE	Not vulnerable	Vulnerable; First fixed in Release 12.2SCF
  12.2SCF	Not vulnerable	12.2(33)SCF4
  12.2SCG	Not vulnerable	Not vulnerable
  12.2SCH	Not vulnerable	Not vulnerable
  12.2SE	Releases up to and including 12.2(54)SE are not vulnerable. First fixed in: 12.2(55)SE7	12.2(55)SE7 Releases up to and including 12.2(54)SE4 are not vulnerable.
  12.2SEA	Not vulnerable	Vulnerable; First fixed in Release 15.0SE
  12.2SEB	Not vulnerable	Vulnerable; First fixed in Release 15.0SE
  12.2SEC	Not vulnerable	Vulnerable; First fixed in Release 15.0SE
  12.2SED	Not vulnerable	Vulnerable; First fixed in Release 15.0SE
  12.2SEE	Not vulnerable	Vulnerable; First fixed in Release 15.0SE
  12.2SEF	Not vulnerable	Vulnerable; First fixed in Release 15.0SE
  12.2SEG	Not vulnerable	Releases prior to 12.2(25)SEG4 are vulnerable; Releases 12.2(25)SEG4 and later are not vulnerable. First fixed inRelease 15.0SE
  12.2SG	Not vulnerable	12.2(53)SG9
  12.2SGA	Not vulnerable	Vulnerable; First fixed in Release 12.2SG
  12.2SM	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  12.2SO	Not vulnerable	Not vulnerable
  12.2SQ	Not vulnerable	12.2(50)SQ5
  12.2SRA	Not vulnerable	Vulnerable; First fixed in Release 12.2SRE
  12.2SRB	Not vulnerable	Vulnerable; First fixed in Release 12.2SRE
  12.2SRC	Not vulnerable	Vulnerable; First fixed in Release 12.2SRE
  12.2SRD	Not vulnerable	Vulnerable; First fixed in Release 12.2SRE
  12.2SRE	Not vulnerable	12.2(33)SRE8
  12.2STE	Not vulnerable	Not vulnerable
  12.2SU	Not vulnerable	Not vulnerable
  12.2SV	Not vulnerable	Vulnerable. Only releases 12.2(25)SV2, 12.2(27)SV5 and 12.2(29)SV3 are vulnerable.
  12.2SVA	Not vulnerable	Not vulnerable
  12.2SVC	Not vulnerable	Not vulnerable
  12.2SVD	Not vulnerable	Not vulnerable
  12.2SVE	Not vulnerable	Not vulnerable
  12.2SW	Not vulnerable	Vulnerable; First fixed in Release 15.0M * Releases up to and including 12.2(23)SW1 are not vulnerable.
  12.2SX	Not vulnerable	Not vulnerable
  12.2SXA	Not vulnerable	Not vulnerable
  12.2SXB	Not vulnerable	Not vulnerable
  12.2SXD	Not vulnerable	Not vulnerable
  12.2SXE	Not vulnerable	Not vulnerable
  12.2SXF	Not vulnerable	Not vulnerable
  12.2SXH	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  12.2SXI	Not vulnerable	12.2(33)SXI11
  12.2SXJ	Not vulnerable	12.2(33)SXJ5
  12.2SY	Not vulnerable	12.2(50)SY4
  12.2SZ	Not vulnerable	Not vulnerable
  12.2T	Not vulnerable	Not vulnerable
  12.2TPC	Not vulnerable	Not vulnerable
  12.2WO	Not vulnerable	Not vulnerable
  12.2XA	Not vulnerable	Not vulnerable
  12.2XB	Not vulnerable	Not vulnerable
  12.2XC	Not vulnerable	Not vulnerable
  12.2XD	Not vulnerable	Not vulnerable
  12.2XE	Not vulnerable	Not vulnerable
  12.2XF	Not vulnerable	Not vulnerable
  12.2XG	Not vulnerable	Not vulnerable
  12.2XH	Not vulnerable	Not vulnerable
  12.2XI	Not vulnerable	Not vulnerable
  12.2XJ	Not vulnerable	Not vulnerable
  12.2XK	Not vulnerable	Not vulnerable
  12.2XL	Not vulnerable	Not vulnerable
  12.2XM	Not vulnerable	Not vulnerable
  12.2XNA	Please see Cisco IOS XE Software Availability	Please see Cisco IOS XE Software Availability
  12.2XNB	Please see Cisco IOS XE Software Availability	Please see Cisco IOS XE Software Availability
  12.2XNC	Please see Cisco IOS XE Software Availability	Please see Cisco IOS XE Software Availability
  12.2XND	Please see Cisco IOS XE Software Availability	Please see Cisco IOS XE Software Availability
  12.2XNE	Please see Cisco IOS XE Software Availability	Please see Cisco IOS XE Software Availability
  12.2XNF	Please see Cisco IOS XE Software Availability	Please see Cisco IOS XE Software Availability
  12.2XO	Not vulnerable	Releases prior to 12.2(54)XO are vulnerable; Releases 12.2(54)XO and later are not vulnerable. First fixed inRelease 12.2SG
  12.2XQ	Not vulnerable	Not vulnerable
  12.2XR	Not vulnerable	Not vulnerable
  12.2XS	Not vulnerable	Not vulnerable
  12.2XT	Not vulnerable	Not vulnerable
  12.2XU	Not vulnerable	Not vulnerable
  12.2XV	Not vulnerable	Not vulnerable
  12.2XW	Not vulnerable	Not vulnerable
  12.2YA	Not vulnerable	Not vulnerable
  12.2YC	Not vulnerable	Not vulnerable
  12.2YD	Not vulnerable	Not vulnerable
  12.2YE	Not vulnerable	Not vulnerable
  12.2YK	Not vulnerable	Not vulnerable
  12.2YO	Not vulnerable	Not vulnerable
  12.2YP	Not vulnerable	Not vulnerable
  12.2YT	Not vulnerable	Not vulnerable
  12.2YW	Not vulnerable	Not vulnerable
  12.2YX	Not vulnerable	Not vulnerable
  12.2YY	Not vulnerable	Not vulnerable
  12.2YZ	Not vulnerable	Not vulnerable
  12.2ZA	Not vulnerable	Not vulnerable
  12.2ZB	Not vulnerable	Not vulnerable
  12.2ZC	Not vulnerable	Not vulnerable
  12.2ZD	Not vulnerable	Not vulnerable
  12.2ZE	Not vulnerable	Not vulnerable
  12.2ZH	Not vulnerable	Not vulnerable
  12.2ZJ	Not vulnerable	Not vulnerable
  12.2ZP	Not vulnerable	Not vulnerable
  12.2ZU	Not vulnerable	Not vulnerable
  12.2ZX	Not vulnerable	Not vulnerable
  12.2ZY	Not vulnerable	Not vulnerable
  12.2ZYA	Not vulnerable	Not vulnerable
  Affected 12.3-Based Releases	First Fixed Release	First Fixed Release for All Advisories in the March 2013 Bundled Publication
  There are no affected 12.3 based releases
  Affected 12.4-Based Releases	First Fixed Release	First Fixed Release for All Advisories in the March 2013 Bundled Publication
  There are no affected 12.4 based releases
  Affected 15.0-Based Releases	First Fixed Release	First Fixed Release for All Advisories in the March 2013 Bundled Publication
  15.0EB	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  15.0ED	Not vulnerable	Not vulnerable
  15.0EY	Not vulnerable	Not vulnerable
  15.0M	Not vulnerable	15.0(1)M10 *
  15.0MR	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  15.0S	Not vulnerable	Vulnerable; First fixed in Release 15.1S Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
  15.0SE	15.0(2)SE1	15.0(2)SE1
  15.0SG	Not vulnerable	Not vulnerable Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
  15.0SQA	Not vulnerable	Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
  15.0SY	Not vulnerable	15.0(1)SY4
  15.0XA	Not vulnerable	Vulnerable; First fixed in Release 15.1M
  15.0XO	Not vulnerable	Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
  Affected 15.1-Based Releases	First Fixed Release	First Fixed Release for All Advisories in the March 2013 Bundled Publication
  15.1EY	Not vulnerable	Vulnerable; First fixed in Release 15.2S
  15.1GC	15.1(4)GC1	15.1(4)GC1
  15.1M	Not vulnerable	15.1(4)M6
  15.1MR	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  15.1MRA	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  15.1S	Not vulnerable	† See footnote Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
  15.1SG	Not vulnerable Cisco IOS XE devices: Please see Cisco IOS XE Software Availability	Not vulnerable Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
  15.1SNG	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  15.1SNH	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  15.1SNI	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  15.1SVA	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  15.1SVC	Not vulnerable	Not vulnerable
  15.1SY	15.1(1)SY1; Available on 24-MAY-13	15.1(1)SY1; Available on 24-MAY-13
  15.1T	Not vulnerable	Vulnerable; First fixed in Release 15.1M
  15.1XB	Not vulnerable	Vulnerable; First fixed in Release 15.1M
  Affected 15.2-Based Releases	First Fixed Release	First Fixed Release for All Advisories in the March 2013 Bundled Publication
  15.2GC	Vulnerable; migrate to any release in 15.4T	Vulnerable; migrate to any release in 15.4T
  15.2GCA	Vulnerable; migrate to any release in 15.4T	Vulnerable; migrate to any release in 15.4T
  15.2JA	Releases prior to 15.2(2)JA are vulnerable; Releases 15.2(2)JA and later are not vulnerable.	15.2(2)JA
  15.2JAX	Not vulnerable	Not vulnerable
  15.2JB	Not vulnerable	Not vulnerable
  15.2JN	Not vulnerable	Not vulnerable
  15.2M	Not vulnerable	15.2(4)M3
  15.2S	Not vulnerable	15.2(4)S2 Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
  15.2SA	Not vulnerable	15.2(2)SA
  15.2SNG	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  15.2SNH	Not vulnerable	Vulnerable; contact your support organization per the instructions in Obtaining Fixed Software section of this advisory.
  15.2SNI	Not vulnerable	Not vulnerable
  15.2T	Not vulnerable	15.2(1)T4; Available on 03-MAY-13  15.2(2)T3  15.2(3)T3
  Affected 15.3-Based Releases	First Fixed Release	First Fixed Release for All Advisories in the March 2013 Bundled Publication
  15.3S	Not vulnerable	Not vulnerable Cisco IOS XE devices: Please see Cisco IOS XE Software Availability
  15.3T	Not vulnerable	15.3(1)T1; Available on 29-MAR-13 15.3(2)T; Available on 29-MAR-13

  * Cisco IOS Software Release 15.0M will reach End of Software Maintenance on April 1, 2013, and no additional rebuilds will occur. Please review the End-of-Life Notice for additional information. Customers are advised to consider migrating to Cisco IOS Software Release 15.1M.

  † For Cisco 7600 Series Routers, the first fixed release for all Cisco Security Advisories in the March 2013 bundled publication is Cisco IOS Software Release 15.1(3)S5. For Cisco 7200 and 7300 Series Routers, the first fixed release for all advisories in the March 2013 bundled publication is Cisco IOS Software Release 15.1(3)S5a, which will be available on April 15, 2013.

  Cisco IOS XE Software

  Cisco IOS XE Software is not affected by the vulnerability disclosed in this advisory.

   

  Cisco IOS XR Software

  Cisco IOS XR Software is not affected by the vulnerability disclosed in this advisory.

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.

  This vulnerability was found by Tenable Network Security team and reported to Cisco by ZDI.

  
  

URL

• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130327-smartinstall

Revision History

• Revision 1.3	2013-April-11	Updated vulnerability status for 15.0EY and 15.0SG trains.
  Revision 1.2	2013-March-28	Updated "Software Versions and Fixes" section, corrected software table.
  Revision 1.1	2013-March-27	Updated "Software Versions and Fixes" section.
  Revision 1.0	2013-March-27	Initial public release.

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