Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability
Cisco Security Advisory
Emergency Support:
+1 877 228 7302 (toll-free within North America)
+1 408 525 6532 (International direct-dial)
Non-emergency Support:
Email: psirt@cisco.com
Support requests that are received via e-mail are typically acknowledged within 48 hours.
Cisco product security incident response is the responsibility of the Cisco Product Security Incident Response Team (PSIRT). The Cisco PSIRT is a dedicated, global team that manages the receipt, investigation, and public reporting of security vulnerability information that is related to Cisco products and networks. The on-call Cisco PSIRT works 24x7 with Cisco customers, independent security researchers, consultants, industry organizations, and other vendors to identify possible security issues with Cisco products and networks.
More information can be found in Cisco Security Vulnerability Policy available at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html
cisco-sa-20180328-smi2
Final
1.8
1.0
2018-03-28T15:17:05
Initial public release.
1.1
2018-03-29T17:13:23
Added the researcher's company name.
1.2
2018-04-02T13:18:01
Metadata update.
1.3
2018-04-06T19:35:44
Added more details to the Workarounds section.
1.4
2018-04-09T14:20:12
Emphasized that Smart Install is enabled by default. Added a link to the list of devices that support Smart Install.
1.5
2018-04-16T18:21:34
Updated IOS Software Checker with products found to be non-vulnerable.
1.6
2018-04-17T15:08:41
Updated IOS Software Checker with products found to be vulnerable.
1.7
2018-05-03T19:35:38
Updated metadata - Cisco Catalyst 6500 and 6800 Series Switches have been identified as not vulnerable, which resulted in fewer releases being vulnerable. Updated the IOS Software Checker accordingly.
1.8
2022-12-15T22:19:55
Updated exploitation information.
2018-03-28T16:00:00
2022-12-15T22:19:55
TVCE
2023-12-15T22:47:48.8096343Z
A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition, or to execute arbitrary code on an affected device.
The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted Smart Install message to an affected device on TCP port 4786. A successful exploit could allow the attacker to cause a buffer overflow on the affected device, which could have the following impacts:
Triggering a reload of the device
Allowing the attacker to execute arbitrary code on the device
Causing an indefinite loop on the affected device that triggers a watchdog crash
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Smart Install client functionality is enabled by default on switches that are running Cisco IOS Software releases that have not been updated to address Cisco bug ID CSCvd36820 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvd36820"].
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi2 ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi2"]
This advisory is part of the March 28, 2018, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes 20 Cisco Security Advisories that describe 22 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: March 2018 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-66682"].
This vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS or IOS XE Software and have the Smart Install client feature enabled.
Only Smart Install client switches are affected by the vulnerability that is described in this advisory. Cisco devices that are configured as a Smart Install director are not affected by this vulnerability.
For a list of devices that support Smart Install, see Smart Install Configuration Guide - Supported Devices ["https://www.cisco.com/c/en/us/td/docs/switches/lan/smart_install/configuration/guide/smart_install/supported_devices.html"].
For information about which Cisco IOS and IOS XE Software releases are vulnerable, see the Fixed Software ["#fixed"] section of this advisory.
Notes Regarding Specific Releases
Smart Install client functionality is enabled by default on switches that are running Cisco IOS Software releases that have not been updated to address Cisco bug ID CSCvd36820 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvd36820"].
Switches that are running releases earlier than Cisco IOS Software Release 12.2(52)SE are not capable of running Smart Install, but they can be Smart Install clients if they support the archive download-sw privileged EXEC command.
Determining Whether the Smart Install Client Feature Is Enabled
To determine whether a device is configured with the Smart Install client feature enabled, use the show vstack config privileged EXEC command on the Smart Install client. An output of Role: Client and Oper Mode: Enabled or Role: Client (SmartInstall enabled) from the show vstack config command confirms that the feature is enabled on the device.
The following examples show the output of the show vstack config command on Cisco Catalyst Switches that are configured as Smart Install clients:
switch1# show vstack config
Role: Client (SmartInstall enabled)
.
.
.
switch2# show vstack config
Capability: Client
Oper Mode: Enabled
Role: Client
.
.
.
Determining the Cisco IOS Software Release
To determine which Cisco IOS Software release is running on a device, administrators can log in to the device, use the show version command in the CLI, and then refer to the system banner that appears. If the device is running Cisco IOS Software, the system banner displays text similar to Cisco Internetwork Operating System Software or Cisco IOS Software. The banner also displays the installed image name in parentheses, followed by the Cisco IOS Software release number and release name. Some Cisco devices do not support the show version command or may provide different output.
The following example shows the output of the command for a device that is running Cisco IOS Software Release 15.5(2)T1 and has an installed image name of C2951-UNIVERSALK9-M:
Router> show version
Cisco IOS Software, C2951 Software (C2951-UNIVERSALK9-M), Version 15.5(2)T1, RELEASE SOFTWARE (fc1) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2015 by Cisco Systems, Inc. Compiled Mon 22-Jun-15 09:32 by prod_rel_team . . .
For information about the naming and numbering conventions for Cisco IOS Software releases, see the Cisco IOS and NX-OS Software Reference Guide ["https://www.cisco.com/c/en/us/about/security-center/ios-nx-os-reference-guide.html"].
Determining the Cisco IOS XE Software Release
To determine which Cisco IOS XE Software release is running on a device, administrators can log in to the device, use the show version command in the CLI, and then refer to the system banner that appears. If the device is running Cisco IOS XE Software, the system banner displays Cisco IOS Software, Cisco IOS XE Software, or similar text.
The following example shows the output of the command for a device that is running Cisco IOS XE Software Release 16.2.1 and has an installed image name of CAT3K_CAA-UNIVERSALK9-M:
ios-xe-device# show version
Cisco IOS Software, Catalyst L3 Switch Software (CAT3K_CAA-UNIVERSALK9-M), Version Denali 16.2.1, RELEASE SOFTWARE (fc1) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2016 by Cisco Systems, Inc. Compiled Sun 27-Mar-16 21:47 by mcpre . . .
For information about the naming and numbering conventions for Cisco IOS XE Software releases, see the Cisco IOS and NX-OS Software Reference Guide ["https://www.cisco.com/c/en/us/about/security-center/ios-nx-os-reference-guide.html"].
No other Cisco products are currently known to be affected by this vulnerability.
Cisco has confirmed that this vulnerability does not affect Cisco IOS XR Software or Cisco NX-OS Software.
Cisco Smart Install is a “plug-and-play” configuration and image-management feature that provides zero-touch deployment for new (typically access layer) 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 feature incorporates no authentication by design.
A Smart Install network consists of exactly one Smart Install director switch or router, also known as an integrated branch director (IBD), and one or more Smart Install client switches, also known as integrated branch clients (IBCs). A client switch does not need to be directly connected to the director; the client switch can be up to seven hops away.
The director provides a single management point for images and configuration of client switches. When a client switch is first installed in the network, the director automatically detects the new switch and identifies the correct Cisco IOS Software image and the configuration file for downloading. The director can also allocate an IP address and hostname to a client.
There are no workarounds that address this vulnerability for customers who require the use of Cisco Smart Install. For customers not requiring Cisco Smart Install, the feature can be disabled with the no vstack command. In software releases that are associated with Cisco Bug ID CSCvd36820 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvd36820"], Cisco Smart Install will auto-disable if not in use.
Administrators are encouraged to consult the informational security advisory on Cisco Smart Install Protocol Misuse ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170214-smi"] and the Smart Install Configuration Guide ["http://www.cisco.com/c/en/us/td/docs/switches/lan/smart_install/configuration/guide/smart_install/concepts.html#23355"].
Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:
https://www.cisco.com/c/en/us/products/end-user-license-agreement.html ["https://www.cisco.com/c/en/us/products/end-user-license-agreement.html"]
Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.
When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page ["https://www.cisco.com/go/psirt"], 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.
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC:
https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html ["https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html"]
Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.
Cisco IOS and IOS XE Software
To help customers determine their exposure to vulnerabilities in Cisco IOS and IOS XE Software, Cisco provides a tool, the Cisco IOS Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"], that identifies any Cisco Security Advisories that impact a specific software release and the earliest release that fixes the vulnerabilities described in each advisory (“First Fixed”). If applicable, the tool also returns the earliest release that fixes all the vulnerabilities described in all the advisories identified (“Combined First Fixed”).
Customers can use this tool to perform the following tasks:
Initiate a search by choosing one or more releases from a drop-down list or uploading a file from a local system for the tool to parse
Enter the output of the show version command for the tool to parse
Create a custom search by including all previously published Cisco Security Advisories, a specific advisory, or all advisories in the most recent bundled publication
To determine whether a release is affected by any published Cisco Security Advisory, use the Cisco IOS Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"] on Cisco.com or enter a Cisco IOS Software or Cisco IOS XE Software release—for example, 15.1(4)M2 or 3.13.8S—in the following field:
For a mapping of Cisco IOS XE Software releases to Cisco IOS Software releases, refer to the Cisco IOS XE 2 Release Notes ["https://www.cisco.com/c/en/us/td/docs/ios/ios_xe/2/release/notes/rnasr21/rnasr21_gen.html#wp3000032"], Cisco IOS XE 3S Release Notes ["https://www.cisco.com/c/en/us/td/docs/ios/ios_xe/3/release/notes/asr1k_rn_3s_rel_notes/asr1k_rn_3s_sys_req.html#wp3069754"], or Cisco IOS XE 3SG Release Notes ["https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/release/note/OL_24726.html#pgfId-2570252"], depending on the Cisco IOS XE Software release.
To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
In November 2021, the Cisco Product Security Incident Response Team (PSIRT) became aware of additional attempted exploitation of this vulnerability in the wild. Cisco continues to strongly recommend that customers upgrade to a fixed software release to remediate this vulnerability.
Cisco would like to thank George Nosenko from Embedi for reporting this vulnerability via GeekPwn.
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 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.
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi2
Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability
https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-66682
Cisco Event Response: March 2018 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication
Cisco IOS 12.2(55)SE
Cisco IOS 12.2(55)SE3
Cisco IOS 12.2(55)SE2
Cisco IOS 12.2(58)SE
Cisco IOS 12.2(55)SE1
Cisco IOS 12.2(58)SE1
Cisco IOS 12.2(55)SE4
Cisco IOS 12.2(58)SE2
Cisco IOS 12.2(55)SE5
Cisco IOS 12.2(55)SE6
Cisco IOS 12.2(55)SE7
Cisco IOS 12.2(55)SE8
Cisco IOS 12.2(55)SE9
Cisco IOS 12.2(55)SE10
Cisco IOS 12.2(55)SE11
Cisco IOS 12.2(55)SE12
Cisco IOS 12.2(55)EX
Cisco IOS 12.2(55)EX1
Cisco IOS 12.2(55)EX2
Cisco IOS 12.2(55)EX3
Cisco IOS 12.2(55)EY
Cisco IOS 12.2(55)EZ
Cisco IOS 15.0(1)EY
Cisco IOS 15.0(1)EY2
Cisco IOS 15.0(1)SE
Cisco IOS 15.0(2)SE
Cisco IOS 15.0(1)SE1
Cisco IOS 15.0(1)SE2
Cisco IOS 15.0(1)SE3
Cisco IOS 15.0(2)SE1
Cisco IOS 15.0(2)SE2
Cisco IOS 15.0(2)SE3
Cisco IOS 15.0(2)SE4
Cisco IOS 15.0(2)SE5
Cisco IOS 15.0(2)SE6
Cisco IOS 15.0(2)SE7
Cisco IOS 15.0(2)SE8
Cisco IOS 15.0(2)SE9
Cisco IOS 15.0(2a)SE9
Cisco IOS 15.0(2)SE10
Cisco IOS 15.0(2)SE11
Cisco IOS 15.0(2)SE10a
Cisco IOS 15.1(2)SG
Cisco IOS 15.1(2)SG1
Cisco IOS 15.1(2)SG2
Cisco IOS 15.1(2)SG3
Cisco IOS 15.1(2)SG4
Cisco IOS 15.1(2)SG5
Cisco IOS 15.1(2)SG6
Cisco IOS 15.1(2)SG7
Cisco IOS 15.1(2)SG8
Cisco IOS 15.0(2)EX
Cisco IOS 15.0(2)EX1
Cisco IOS 15.0(2)EX2
Cisco IOS 15.0(2)EX3
Cisco IOS 15.0(2)EX4
Cisco IOS 15.0(2)EX5
Cisco IOS 15.0(2)EX6
Cisco IOS 15.0(2)EX7
Cisco IOS 15.0(2)EX8
Cisco IOS 15.0(2a)EX5
Cisco IOS 15.0(2)EX10
Cisco IOS 15.0(2)EX11
Cisco IOS 15.0(2)EX13
Cisco IOS 15.0(2)EX12
Cisco IOS 15.0(2)EA1
Cisco IOS 15.2(1)E
Cisco IOS 15.2(2)E
Cisco IOS 15.2(1)E1
Cisco IOS 15.2(3)E
Cisco IOS 15.2(1)E2
Cisco IOS 15.2(1)E3
Cisco IOS 15.2(2)E1
Cisco IOS 15.2(2b)E
Cisco IOS 15.2(4)E
Cisco IOS 15.2(3)E1
Cisco IOS 15.2(2)E2
Cisco IOS 15.2(2a)E1
Cisco IOS 15.2(2)E3
Cisco IOS 15.2(2a)E2
Cisco IOS 15.2(3)E2
Cisco IOS 15.2(3a)E
Cisco IOS 15.2(3)E3
Cisco IOS 15.2(3m)E2
Cisco IOS 15.2(4)E1
Cisco IOS 15.2(2)E4
Cisco IOS 15.2(2)E5
Cisco IOS 15.2(4)E2
Cisco IOS 15.2(4m)E1
Cisco IOS 15.2(3)E4
Cisco IOS 15.2(5)E
Cisco IOS 15.2(3m)E7
Cisco IOS 15.2(4)E3
Cisco IOS 15.2(2)E6
Cisco IOS 15.2(5a)E
Cisco IOS 15.2(5)E1
Cisco IOS 15.2(5b)E
Cisco IOS 15.2(4m)E3
Cisco IOS 15.2(3m)E8
Cisco IOS 15.2(2)E5a
Cisco IOS 15.2(5c)E
Cisco IOS 15.2(3)E5
Cisco IOS 15.2(2)E5b
Cisco IOS 15.2(4n)E2
Cisco IOS 15.2(4o)E2
Cisco IOS 15.2(5a)E1
Cisco IOS 15.2(4)E4
Cisco IOS 15.2(2)E7
Cisco IOS 15.2(5)E2
Cisco IOS 15.2(4p)E1
Cisco IOS 15.2(6)E
Cisco IOS 15.2(5)E2b
Cisco IOS 15.2(4)E5
Cisco IOS 15.2(5)E2c
Cisco IOS 15.2(4m)E2
Cisco IOS 15.2(4o)E3
Cisco IOS 15.2(4q)E1
Cisco IOS 15.2(6)E0a
Cisco IOS 15.2(2)E7b
Cisco IOS 15.2(4)E5a
Cisco IOS 15.2(6)E0c
Cisco IOS 15.2(4s)E1
Cisco IOS 15.2(4s)E2
Cisco IOS 15.0(2)EZ
Cisco IOS 15.2(1)EY
Cisco IOS 15.0(2)EJ
Cisco IOS 15.0(2)EJ1
Cisco IOS 15.2(5)EX
Cisco IOS 15.2(4)JAZ1
Cisco IOS 15.2(2)EB
Cisco IOS 15.2(2)EB1
Cisco IOS 15.2(2)EB2
Cisco IOS 15.2(2)EA
Cisco IOS 15.2(2)EA1
Cisco IOS 15.2(2)EA2
Cisco IOS 15.2(3)EA
Cisco IOS 15.2(4)EA
Cisco IOS 15.2(4)EA1
Cisco IOS 15.2(2)EA3
Cisco IOS 15.2(4)EA3
Cisco IOS 15.2(5)EA
Cisco IOS 15.2(4)EA4
Cisco IOS 15.2(4)EA2
Cisco IOS 15.2(4)EA5
Cisco IOS 15.2(4)EA6
Cisco IOS 15.2(4)EC1
Cisco IOS 15.2(4)EC2
Cisco IOS 15.3(3)JPI
Cisco IOS 15.3(3)JPJ
Cisco IOS XE Software 3.2.0SE
Cisco IOS XE Software 3.2.1SE
Cisco IOS XE Software 3.2.2SE
Cisco IOS XE Software 3.2.3SE
Cisco IOS XE Software 3.3.0SE
Cisco IOS XE Software 3.3.1SE
Cisco IOS XE Software 3.3.2SE
Cisco IOS XE Software 3.3.3SE
Cisco IOS XE Software 3.3.4SE
Cisco IOS XE Software 3.3.5SE
Cisco IOS XE Software 3.3.0XO
Cisco IOS XE Software 3.3.1XO
Cisco IOS XE Software 3.3.2XO
Cisco IOS XE Software 3.4.0SG
Cisco IOS XE Software 3.4.2SG
Cisco IOS XE Software 3.4.1SG
Cisco IOS XE Software 3.4.3SG
Cisco IOS XE Software 3.4.4SG
Cisco IOS XE Software 3.4.5SG
Cisco IOS XE Software 3.4.6SG
Cisco IOS XE Software 3.4.7SG
Cisco IOS XE Software 3.4.8SG
Cisco IOS XE Software 3.5.0E
Cisco IOS XE Software 3.5.1E
Cisco IOS XE Software 3.5.2E
Cisco IOS XE Software 3.5.3E
Cisco IOS XE Software 3.6.0E
Cisco IOS XE Software 3.6.1E
Cisco IOS XE Software 3.6.0aE
Cisco IOS XE Software 3.6.0bE
Cisco IOS XE Software 3.6.2aE
Cisco IOS XE Software 3.6.3E
Cisco IOS XE Software 3.6.4E
Cisco IOS XE Software 3.6.5E
Cisco IOS XE Software 3.6.6E
Cisco IOS XE Software 3.6.5aE
Cisco IOS XE Software 3.6.5bE
Cisco IOS XE Software 3.6.7E
Cisco IOS XE Software 3.6.7aE
Cisco IOS XE Software 3.6.7bE
Cisco IOS XE Software 3.7.0E
Cisco IOS XE Software 3.7.1E
Cisco IOS XE Software 3.7.2E
Cisco IOS XE Software 3.7.3E
Cisco IOS XE Software 3.7.4E
Cisco IOS XE Software 3.7.5E
Cisco IOS XE Software 16.1.1
Cisco IOS XE Software 16.1.2
Cisco IOS XE Software 16.1.3
Cisco IOS XE Software 16.2.1
Cisco IOS XE Software 16.2.2
Cisco IOS XE Software 3.8.0E
Cisco IOS XE Software 3.8.1E
Cisco IOS XE Software 3.8.2E
Cisco IOS XE Software 3.8.3E
Cisco IOS XE Software 3.8.4E
Cisco IOS XE Software 3.8.5E
Cisco IOS XE Software 3.8.5aE
Cisco IOS XE Software 16.3.1
Cisco IOS XE Software 16.3.2
Cisco IOS XE Software 16.3.3
Cisco IOS XE Software 16.3.1a
Cisco IOS XE Software 16.3.4
Cisco IOS XE Software 16.3.5
Cisco IOS XE Software 16.3.5b
Cisco IOS XE Software 16.4.1
Cisco IOS XE Software 16.5.1
Cisco IOS XE Software 16.5.1a
Cisco IOS XE Software 3.9.0E
Cisco IOS XE Software 3.9.1E
Cisco IOS XE Software 3.9.2E
Cisco IOS XE Software 3.9.2bE
Cisco IOS XE Software 16.6.1
Cisco IOS XE Software 3.10.0E
Cisco IOS XE Software 3.10.0cE
Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability
CSCvg76186
CSCvg76186
Complete.
CVE-2018-0171
CVRFPID-103559
CVRFPID-103763
CVRFPID-104376
CVRFPID-105394
CVRFPID-105660
CVRFPID-105689
CVRFPID-105987
CVRFPID-106029
CVRFPID-106674
CVRFPID-107283
CVRFPID-107852
CVRFPID-108306
CVRFPID-109098
CVRFPID-109439
CVRFPID-109760
CVRFPID-109808
CVRFPID-111010
CVRFPID-111019
CVRFPID-111674
CVRFPID-113961
CVRFPID-114665
CVRFPID-115477
CVRFPID-115832
CVRFPID-115939
CVRFPID-116083
CVRFPID-183811
CVRFPID-184125
CVRFPID-187057
CVRFPID-187269
CVRFPID-188035
CVRFPID-189064
CVRFPID-189115
CVRFPID-189187
CVRFPID-189455
CVRFPID-190635
CVRFPID-190637
CVRFPID-191928
CVRFPID-191948
CVRFPID-192706
CVRFPID-192910
CVRFPID-192911
CVRFPID-193033
CVRFPID-193283
CVRFPID-194540
CVRFPID-194741
CVRFPID-194913
CVRFPID-195469
CVRFPID-195489
CVRFPID-195770
CVRFPID-195943
CVRFPID-197462
CVRFPID-197465
CVRFPID-197471
CVRFPID-197483
CVRFPID-198060
CVRFPID-198063
CVRFPID-198542
CVRFPID-200488
CVRFPID-200496
CVRFPID-200503
CVRFPID-201074
CVRFPID-201366
CVRFPID-204097
CVRFPID-204102
CVRFPID-204108
CVRFPID-204186
CVRFPID-204187
CVRFPID-204228
CVRFPID-204818
CVRFPID-204831
CVRFPID-205064
CVRFPID-205672
CVRFPID-209028
CVRFPID-209029
CVRFPID-209034
CVRFPID-209045
CVRFPID-209046
CVRFPID-209047
CVRFPID-209049
CVRFPID-209050
CVRFPID-209051
CVRFPID-209358
CVRFPID-209359
CVRFPID-209839
CVRFPID-209887
CVRFPID-210203
CVRFPID-210732
CVRFPID-210766
CVRFPID-210958
CVRFPID-211296
CVRFPID-211570
CVRFPID-212329
CVRFPID-213610
CVRFPID-213788
CVRFPID-214072
CVRFPID-214078
CVRFPID-214217
CVRFPID-214218
CVRFPID-214556
CVRFPID-214797
CVRFPID-214965
CVRFPID-214992
CVRFPID-216295
CVRFPID-217805
CVRFPID-218891
CVRFPID-218995
CVRFPID-220038
CVRFPID-220441
CVRFPID-220457
CVRFPID-220460
CVRFPID-220461
CVRFPID-220466
CVRFPID-220507
CVRFPID-220664
CVRFPID-220689
CVRFPID-221033
CVRFPID-221137
CVRFPID-222275
CVRFPID-222342
CVRFPID-222419
CVRFPID-222436
CVRFPID-222500
CVRFPID-222530
CVRFPID-222924
CVRFPID-223086
CVRFPID-223143
CVRFPID-224553
CVRFPID-224868
CVRFPID-225160
CVRFPID-225740
CVRFPID-226077
CVRFPID-227598
CVRFPID-227754
CVRFPID-227959
CVRFPID-228057
CVRFPID-228075
CVRFPID-228151
CVRFPID-230588
CVRFPID-230589
CVRFPID-230590
CVRFPID-230591
CVRFPID-230965
CVRFPID-230990
CVRFPID-231074
CVRFPID-231245
CVRFPID-241916
CVRFPID-250628
CVRFPID-274202
CVRFPID-275845
CVRFPID-196216
CVRFPID-196218
CVRFPID-196220
CVRFPID-196221
CVRFPID-196222
CVRFPID-196223
CVRFPID-196230
CVRFPID-196231
CVRFPID-196288
CVRFPID-196925
CVRFPID-197145
CVRFPID-206163
CVRFPID-206164
CVRFPID-206165
CVRFPID-206166
CVRFPID-206167
CVRFPID-206168
CVRFPID-206169
CVRFPID-206170
CVRFPID-206172
CVRFPID-206173
CVRFPID-206200
CVRFPID-206201
CVRFPID-206202
CVRFPID-206203
CVRFPID-206211
CVRFPID-210070
CVRFPID-210073
CVRFPID-210074
CVRFPID-210075
CVRFPID-210076
CVRFPID-210077
CVRFPID-212436
CVRFPID-212674
CVRFPID-213100
CVRFPID-213785
CVRFPID-213790
CVRFPID-213797
CVRFPID-213809
CVRFPID-213811
CVRFPID-213812
CVRFPID-213960
CVRFPID-214051
CVRFPID-214993
CVRFPID-217253
CVRFPID-217255
CVRFPID-217256
CVRFPID-217259
CVRFPID-217279
CVRFPID-217280
CVRFPID-217282
CVRFPID-217283
CVRFPID-218901
CVRFPID-220290
CVRFPID-220357
CVRFPID-220489
CVRFPID-220802
CVRFPID-221108
CVRFPID-221185
CVRFPID-222435
CVRFPID-222483
CVRFPID-222695
CVRFPID-222711
CVRFPID-224840
CVRFPID-225784
CVRFPID-226158
CVRFPID-226331
CVRFPID-227555
CVRFPID-227755
CVRFPID-229124
CVRFPID-230240
CVRFPID-230998
CVRFPID-231004
CVRFPID-231187
CVRFPID-231246
9.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
There are no workarounds that address this vulnerability for customers who require the use of Cisco Smart Install. For customers not requiring Cisco Smart Install, the feature can be disabled with the no vstack command. In software releases that are associated with Cisco Bug ID CSCvd36820 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvd36820"], Cisco Smart Install will auto-disable if not in use.
Administrators are encouraged to consult the informational security advisory on Cisco Smart Install Protocol Misuse ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170214-smi"] and the Smart Install Configuration Guide ["http://www.cisco.com/c/en/us/td/docs/switches/lan/smart_install/configuration/guide/smart_install/concepts.html#23355"].
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi2
Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability