-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Cisco Security Advisory: Cisco IOS Software Smart Install Remote Code Execution Vulnerability Advisory ID: cisco-sa-20110928-smart-install Revision 1.0 For Public Release 2011 September 28 1600 UTC (GMT) +-------------------------------------------------------------------- Summary ======= A vulnerability exists in the Smart Install feature of Cisco Catalyst Switches running Cisco IOS Software that could allow an unauthenticated, remote attacker to perform remote code execution on the affected device. Cisco has released free software updates that address this vulnerability. There are no workarounds available to mitigate this vulnerability other than disabling the Smart Install feature. This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20110928-smart-install.shtml. Note: The September 28, 2011, Cisco IOS Software Security Advisory bundled publication includes ten Cisco Security Advisories. Nine of the advisories address vulnerabilities in Cisco IOS Software, and one advisory addresses a vulnerability in Cisco Unified Communications Manager. Each 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 vulnerabilities in the September 2011 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_sep11.html Affected Products ================= This vulnerability only affects Cisco Catalyst Switches and Cisco Integrated Services Routers with the Smart Install feature enabled. Vulnerable Products +------------------ Devices configured as a Smart Install client or director are affected by this vulnerability. To display Smart Install information, use the "show vstack config" privileged EXEC command on the Smart Install director or client. The outputs of the show commands are different when entered on the director or on the client. The following is the output of the "show vstack config" in a device configured as a Smart Install client: switch#show vstack config Role: Client Vstack Director IP address: 10.1.1.163 The following is the output of the "show vstack config" in a Cisco Catalyst Switch configured as a Smart Install director: Director# show vstack config Role: Director Vstack Director IP address: 10.1.1.163 Vstack Mode: Basic Vstack default management vlan: 1 Vstack management Vlans: none Vstack Config file: tftp://10.1.1.100/default-config.txt Vstack Image file: tftp://10.1.1.100/c3750e-universalk9-tar.122- Join Window Details: Window: Open (default) Operation Mode: auto (default) Vstack Backup Details: Mode: On (default) Repository: flash:/vstack (default) 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 the white paper Cisco IOS and NX-OS Software Reference Guide available 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 ======= Smart Install is a plug-and-play configuration and image-management feature that provides zero-touch deployment for new switches and Cisco Integrated Services Routers. This means that a customer can ship a device to a location, place it in the network and power it on with no configuration required on the device. A vulnerability exists in the Smart Install feature of Cisco Catalyst Switches running Cisco IOS Software that could allow an unauthenticated, remote attacker to perform remote code execution on the affected device. Smart Install uses TCP port 4786 for communication. An established TCP connection with a completed TCP three-way handshake is needed to be able to trigger this vulnerability. This vulnerability is documented in Cisco bug ID CSCto10165, and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-3271. Vulnerability Scoring Details ============================= Cisco has provided scores for the vulnerability in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this Security Advisory is done in accordance with CVSS version 2.0. CVSS is a standards-based scoring method that conveys vulnerability severity and helps determine urgency and priority of response. Cisco has provided a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks. Cisco has provided an FAQ to answer additional questions regarding CVSS at: http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at: http://intellishield.cisco.com/security/alertmanager/cvss * CSCto10165 ("Smart Install Crashes with certain IP Packets") CVSS Base Score - 10.0 Access Vector - Network Access Complexity - Low Authentication - None Confidentiality Impact - Complete Integrity Impact - Complete Availability Impact - Complete CVSS Temporal Score - 8.3 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed Impact ====== Successful exploitation could allow an unauthenticated, remote attacker to perform remote code execution on the affected device. Software Versions and Fixes =========================== When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution. In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance. Additionally, the Cisco IOS Software Checker is available on the Cisco Security Intelligence Operations (SIO) portal at http://tools.cisco.com/security/center/selectIOSVersion.x. It provides several features for checking which Security Advisories affect specified versions of Cisco IOS Software. 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 For This Advisory column. The First Fixed Release for All Advisories in the September 2011 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. +------------------------------------------------------------+ | Major | Availability of Repaired Releases | | Release | | |------------+-----------------------------------------------| | Affected | First Fixed | First Fixed Release for All | | 12.0-Based | Release | Advisories in the September | | Releases | | 2011 Bundled Publication | |------------------------------------------------------------| | There are no affected 12.0 based releases | |------------------------------------------------------------| | Affected | First Fixed | First Fixed Release for All | | 12.1-Based | Release | Advisories in the September | | Releases | | 2011 Bundled Publication | |------------------------------------------------------------| | There are no affected 12.1 based releases | |------------------------------------------------------------| | Affected | First Fixed | First Fixed Release for All | | 12.2-Based | Release | Advisories in the September | | Releases | | 2011 Bundled Publication | |------------+----------------+------------------------------| | 12.2 | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | 12.2B | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | 12.2BC | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | 12.2BW | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2BX | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SB | |------------+----------------+------------------------------| | 12.2BY | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2BZ | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2CX | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | 12.2CY | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2CZ | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SB | |------------+----------------+------------------------------| | 12.2DA | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2DD | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2DX | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2EU | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | | | Releases up to and including | | 12.2EW | Not vulnerable | 12.2(20)EW4 are not | | | | vulnerable. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2EWA | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2EX | 12.2(55)EX3 | 12.2(55)EX3 | |------------+----------------+------------------------------| | 12.2EY | 12.2(58)EY | 12.2(58)EY | |------------+----------------+------------------------------| | | Vulnerable; | | | | migrate to any | | | | release in | | | | 15.0SE | | | 12.2EZ | | Vulnerable; migrate to any | | | Releases up to | release in 15.0SE | | | and including | | | | 12.2(53)EZ are | | | | not | | | | vulnerable. | | |------------+----------------+------------------------------| | 12.2FX | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SE | |------------+----------------+------------------------------| | 12.2FY | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2EX | |------------+----------------+------------------------------| | 12.2FZ | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SE | |------------+----------------+------------------------------| | 12.2IRA | Not vulnerable | Vulnerable; migrate to any | | | | release in 12.2IRG | |------------+----------------+------------------------------| | 12.2IRB | Not vulnerable | Vulnerable; migrate to any | | | | release in 12.2IRG | |------------+----------------+------------------------------| | 12.2IRC | Not vulnerable | Vulnerable; migrate to any | | | | release in 12.2IRG | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2IRD | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2IRE | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2IRF | Not vulnerable | Vulnerable; migrate to any | | | | release in 12.2IRG | |------------+----------------+------------------------------| | 12.2IRG | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2IXA | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2IXB | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2IXC | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2IXD | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2IXE | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2IXF | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2IXG | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2IXH | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2JA | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2JK | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2MB | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2MC | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | 12.2MRA | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SRD | |------------+----------------+------------------------------| | 12.2MRB | Not vulnerable | 12.2(33)MRB5 | |------------+----------------+------------------------------| | | | Releases prior to 12.2(30)S | | | | are vulnerable; Releases | | 12.2S | Not vulnerable | 12.2(30)S and later are not | | | | vulnerable. First fixed in | | | | Release 12.2SB | |------------+----------------+------------------------------| | | | 12.2(31)SB20 | | 12.2SB | Not vulnerable | | | | | 12.2(33)SB10 | |------------+----------------+------------------------------| | 12.2SBC | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SB | |------------+----------------+------------------------------| | 12.2SCA | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SCC | |------------+----------------+------------------------------| | 12.2SCB | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SCC | |------------+----------------+------------------------------| | 12.2SCC | Not vulnerable | 12.2(33)SCC7 | |------------+----------------+------------------------------| | 12.2SCD | Not vulnerable | 12.2(33)SCD6 | |------------+----------------+------------------------------| | | | 12.2(33)SCE1 | | 12.2SCE | Not vulnerable | | | | | 12.2(33)SCE2 | |------------+----------------+------------------------------| | 12.2SCF | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | | Releases up to | 12.2(55)SE3 | | 12.2SE | and including | | | | 12.2(54)SE are | 12.2(58)SE | | | not vulnerable | | |------------+----------------+------------------------------| | 12.2SEA | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SE | |------------+----------------+------------------------------| | 12.2SEB | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SE | |------------+----------------+------------------------------| | 12.2SEC | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SE | |------------+----------------+------------------------------| | 12.2SED | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SE | |------------+----------------+------------------------------| | 12.2SEE | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SE | |------------+----------------+------------------------------| | 12.2SEF | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SE | |------------+----------------+------------------------------| | | | Releases prior to 12.2(25) | | | | SEG4 are vulnerable; | | 12.2SEG | Not vulnerable | Releases 12.2(25)SEG4 and | | | | later are not vulnerable. | | | | First fixed in Release | | | | 12.2EX | |------------+----------------+------------------------------| | | | Releases prior to 12.2(53) | | 12.2SG | Not vulnerable | SG4 are vulnerable; Releases | | | | 12.2(53)SG4 and later are | | | | not vulnerable. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2SGA | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2SL | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2SM | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2SO | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2SQ | Not vulnerable | 12.2(50)SQ3 | |------------+----------------+------------------------------| | 12.2SRA | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SRD | |------------+----------------+------------------------------| | 12.2SRB | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SRD | |------------+----------------+------------------------------| | 12.2SRC | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SRD | |------------+----------------+------------------------------| | 12.2SRD | Not vulnerable | 12.2(33)SRD6 | |------------+----------------+------------------------------| | 12.2SRE | Not vulnerable | 12.2(33)SRE4 | |------------+----------------+------------------------------| | 12.2STE | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2SU | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | | | Releases prior to 12.2(29a) | | | | SV are vulnerable; Releases | | 12.2SV | Not vulnerable | 12.2(29a)SV and later are | | | | not vulnerable. Migrate to | | | | any release in 12.2SVD | |------------+----------------+------------------------------| | 12.2SVA | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2SVC | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2SVD | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2SVE | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2SW | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2SX | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SXF | |------------+----------------+------------------------------| | 12.2SXA | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SXF | |------------+----------------+------------------------------| | 12.2SXB | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SXF | |------------+----------------+------------------------------| | 12.2SXD | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SXF | |------------+----------------+------------------------------| | 12.2SXE | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SXF | |------------+----------------+------------------------------| | 12.2SXF | Not vulnerable | 12.2(18)SXF17b | |------------+----------------+------------------------------| | 12.2SXH | Not vulnerable | 12.2(33)SXH8a | |------------+----------------+------------------------------| | 12.2SXI | Not vulnerable | 12.2(33)SXI6 | |------------+----------------+------------------------------| | 12.2SXJ | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2SY | Not vulnerable | 12.2(50)SY | |------------+----------------+------------------------------| | 12.2SZ | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SB | |------------+----------------+------------------------------| | 12.2T | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2TPC | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2XA | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2XB | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | 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 | |------------+----------------+------------------------------| | 12.2XN | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | | Please see | | | 12.2XNA | Cisco IOS-XE | Please see Cisco IOS-XE | | | Software | Software Availability | | | Availability | | |------------+----------------+------------------------------| | | Please see | | | 12.2XNB | Cisco IOS-XE | Please see Cisco IOS-XE | | | Software | Software Availability | | | Availability | | |------------+----------------+------------------------------| | | Please see | | | 12.2XNC | Cisco IOS-XE | Please see Cisco IOS-XE | | | Software | Software Availability | | | Availability | | |------------+----------------+------------------------------| | | Please see | | | 12.2XND | Cisco IOS-XE | Please see Cisco IOS-XE | | | Software | Software Availability | | | Availability | | |------------+----------------+------------------------------| | | Please see | | | 12.2XNE | Cisco IOS-XE | Please see Cisco IOS-XE | | | Software | Software Availability | | | Availability | | |------------+----------------+------------------------------| | | Please see | | | 12.2XNF | Cisco IOS-XE | Please see Cisco IOS-XE | | | Software | Software Availability | | | Availability | | |------------+----------------+------------------------------| | | | Releases prior to 12.2(54)XO | | 12.2XO | Not vulnerable | are vulnerable; Releases | | | | 12.2(54)XO and later are not | | | | vulnerable. | |------------+----------------+------------------------------| | 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 | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | 12.2YB | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2YC | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2YD | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2YE | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YF | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YG | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YH | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YJ | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2YK | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YL | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2YM | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YN | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2YO | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2YP | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YQ | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YR | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YS | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YT | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YU | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YV | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YW | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YX | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YY | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2YZ | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2ZA | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SXF | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2ZB | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2ZC | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2ZD | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2ZE | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | 12.2ZF | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | 12.2ZG | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2ZH | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.4 | |------------+----------------+------------------------------| | 12.2ZJ | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2ZL | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 12.2ZP | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | 12.2ZU | Not vulnerable | Vulnerable; First fixed in | | | | Release 12.2SXH | |------------+----------------+------------------------------| | 12.2ZX | Not vulnerable | Not vulnerable | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2ZY | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 12.2ZYA | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | Affected | First Fixed | First Fixed Release for All | | 12.3-Based | Release | Advisories in the September | | Releases | | 2011 Bundled Publication | |------------------------------------------------------------| | There are no affected 12.3 based releases | |------------------------------------------------------------| | Affected | First Fixed | First Fixed Release for All | | 12.4-Based | Release | Advisories in the September | | Releases | | 2011 Bundled Publication | |------------------------------------------------------------| | There are no affected 12.4 based releases | |------------------------------------------------------------| | Affected | First Fixed | First Fixed Release for All | | 15.0-Based | Release | Advisories in the September | | Releases | | 2011 Bundled Publication | |------------------------------------------------------------| | There are no affected 15.0 based releases | |------------------------------------------------------------| | Affected | First Fixed | First Fixed Release for All | | 15.1-Based | Release | Advisories in the September | | Releases | | 2011 Bundled Publication | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 15.1EY | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | 15.1GC | Not vulnerable | Vulnerable; First fixed in | | | | Release 15.1T | |------------+----------------+------------------------------| | | 15.1(4)M2; | 15.1(4)M2; Available on | | 15.1M | Available on | 30-SEP-11 | | | 30-SEP-11 | | |------------+----------------+------------------------------| | | | Vulnerable; contact your | | | | support organization per the | | 15.1MR | Not vulnerable | instructions in the | | | | Obtaining Fixed Software | | | | section of this advisory. | |------------+----------------+------------------------------| | | | 15.1(2)S2 | | 15.1S | Not vulnerable | | | | | 15.1(3)S | |------------+----------------+------------------------------| | | | 15.1(2)T4 | | 15.1T | 15.1(3)T2 | | | | | 15.1(1)T4 on 8-Dec-2011 | |------------+----------------+------------------------------| | | Vulnerable; | | | | First fixed in | | | | Release 15.1T | | | | | Vulnerable; First fixed in | | 15.1XB | Releases up to | Release 15.1T | | | and including | | | | 15.1(1)XB are | | | | not | | | | vulnerable. | | |------------+----------------+------------------------------| | Affected | First Fixed | First Fixed Release for All | | 15.2-Based | Release | Advisories in the September | | Releases | | 2011 Bundled Publication | |------------------------------------------------------------| | There are no affected 15.2 based releases | +------------------------------------------------------------+ 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. Cisco IOS XR Software is not affected by the vulnerabilities disclosed in the September 28, 2011, Cisco IOS Software Security Advisory bundled publication. 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 in client switches. No configuration is needed in client switches. If Smart Install feature is not required, and the device supports the configuration command "no vstack" as introduced by Cisco Bug ID CSCtj75729, then disabling Smart Install, with the "no vstack" configuration command mitigates this vulnerability. Additional mitigations that can be deployed on Cisco devices within the network are available in the Cisco Applied Mitigation Bulletin companion document for this advisory, which is available at the following link: http://www.cisco.com/warp/public/707/cisco-amb-20110928-smart-install.shtml Obtaining Fixed Software ======================== Cisco has released free software updates that address this vulnerability. Prior to deploying software, customers should consult their maintenance provider or check the software for feature set compatibility and known issues specific to their environment. Customers may only install and expect support for the feature sets they have purchased. By installing, downloading, accessing or otherwise using such software upgrades, customers agree to be bound by the terms of Cisco's software license terms found at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html, or as otherwise set forth at Cisco.com Downloads at http://www.cisco.com/public/sw-center/sw-usingswc.shtml. Do not contact psirt@cisco.com or security-alert@cisco.com for software upgrades. Customers with Service Contracts +------------------------------- Customers with contracts should obtain upgraded software through their regular update channels. For most customers, this means that upgrades should be obtained through the Software Center on Cisco's worldwide website at http://www.cisco.com. Customers using Third Party Support Organizations +------------------------------------------------ Customers whose Cisco products are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers should contact that support organization for guidance and assistance with the appropriate course of action in regards to this advisory. The effectiveness of any workaround or fix is dependent on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Due to the variety of affected products and releases, customers should consult with their service provider or support organization to ensure any applied workaround or fix is the most appropriate for use in the intended network before it is deployed. Customers without Service Contracts +---------------------------------- Customers who purchase direct from Cisco but do not hold a Cisco service contract, and customers who purchase through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should acquire upgrades by contacting the Cisco Technical Assistance Center (TAC). TAC contacts are as follows. * +1 800 553 2447 (toll free from within North America) * +1 408 526 7209 (toll call from anywhere in the world) * e-mail: tac@cisco.com Customers should have their product serial number available and be prepared to give the URL of this notice as evidence of entitlement to a free upgrade. Free upgrades for non-contract customers must be requested through the TAC. Refer to http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html for additional TAC contact information, including localized telephone numbers, and instructions and e-mail addresses for use in various languages. Exploitation and Public Announcements ===================================== The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory. This vulnerability was discovered and reported to Cisco by Greg Jones of Digital Assurance. Status of this Notice: FINAL ============================ THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors. Distribution ============ This advisory is posted on Cisco's worldwide website at: http://www.cisco.com/warp/public/707/cisco-sa-20110928-smart-install.shtml In addition to worldwide web posting, a text version of this notice is clear-signed with the Cisco PSIRT PGP key and is posted to the following e-mail and Usenet news recipients. * cust-security-announce@cisco.com * first-bulletins@lists.first.org * bugtraq@securityfocus.com * vulnwatch@vulnwatch.org * cisco@spot.colorado.edu * cisco-nsp@puck.nether.net * full-disclosure@lists.grok.org.uk * comp.dcom.sys.cisco@newsgate.cisco.com Future updates of this advisory, if any, will be placed on Cisco's worldwide website, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the above URL for any updates. Revision History ================ +------------------------------------------------------------+ | Revision 1.0 | 2011-September-28 | Initial public release | +------------------------------------------------------------+ Cisco Security Procedures ========================= Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at http://www.cisco.com/en/US/products/ products_security_vulnerability_policy.html. This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at http://www.cisco.com/ go/psirt. +-------------------------------------------------------------------- Copyright 2010-2011 Cisco Systems, Inc. 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