Cisco IOS XE SD-WAN Software Command Injection Vulnerability
Cisco Security Advisory
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More information can be found in Cisco Security Vulnerability Policy available at https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html
cisco-sa-ioxesdwan-clicmdinj-7bYX5k3
Final
1.0
1.0
2021-09-22T15:48:25
Initial public release.
2021-09-22T16:00:00
2021-09-22T16:00:00
TVCE
A vulnerability in the CLI of Cisco IOS XE SD-WAN Software and Cisco IOS XE Software could allow an authenticated, local attacker to execute arbitrary commands with elevated privileges on an affected device.
This vulnerability is due to insufficient validation of arguments passed to certain CLI commands. An attacker could exploit this vulnerability by including malicious input in the argument of an affected command. A successful exploit could allow the attacker to execute arbitrary commands with elevated privileges on the underlying operating system. An attacker would need valid user credentials to exploit this vulnerability.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxesdwan-clicmdinj-7bYX5k3 ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxesdwan-clicmdinj-7bYX5k3"]
This advisory is part of the September 2021 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2021 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication. ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74581"]
At the time of publication, this vulnerability affected Cisco IOS XE SD-WAN Software and Cisco IOS XE Software if they were running in Controller mode.
Note: The standalone Cisco IOS XE SD-WAN release images are separate from the universal Cisco IOS XE Software releases. The SD-WAN feature set was first integrated into the universal Cisco IOS XE Software releases starting with IOS XE Software Release 17.2.1r. For additional information, see the Install and Upgrade Cisco IOS XE Release 17.2.1r and Later ["https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-gs-book/install-upgrade-17-2-later.html"] chapter of the Cisco SD-WAN Getting Started Guide.
For information about which Cisco software releases are vulnerable, see the Fixed Software ["#fs"] section of this advisory.
Only products listed in the Vulnerable Products ["#vp"] section of this advisory are known to be affected by this vulnerability.
Cisco has confirmed that this vulnerability does not affect the following Cisco products:
IOS Software
IOS XE Software in autonomous mode
IOS XR Software
Meraki products
NX-OS Software
SD-WAN vBond Orchestrator Software
SD-WAN vEdge Routers
SD-WAN vManage Software
SD-WAN vSmart Controller Software
There are no workarounds that address this vulnerability.
When considering software upgrades ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"], customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories 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.
Cisco IOS and IOS XE Software
To help customers determine their exposure to vulnerabilities in Cisco IOS and IOS XE Software, Cisco provides the Cisco Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"] to identify 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 the Cisco Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"] to search advisories in the following ways:
Choose the software and one or more releases
Upload a .txt file that includes a list of specific releases
Enter the output of the show version command
After initiating a search, customers can customize the search to include all Cisco Security Advisories, a specific advisory, or all advisories in the most recent bundled publication.
Customers can also use the following form to determine whether a release is affected by any Cisco Security Advisory by entering a Cisco IOS or IOS XE Software release—for example, 15.1(4)M2 or 3.13.8S:
By default, the Cisco Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"] includes results only for vulnerabilities that have a Critical or High Security Impact Rating (SIR). To include results for Medium SIR vulnerabilities, customers can use the Cisco Software Checker on Cisco.com and check the Medium check box in the drop-down list under Impact Rating when customizing a search.
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.
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 during internal security testing by Paul Giblock of the Cisco Advanced Security Initiatives Group (ASIG).
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-ioxesdwan-clicmdinj-7bYX5k3
Cisco IOS XE SD-WAN Software Command Injection Vulnerability
https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74581
Cisco Event Response: September 2021 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication
Cisco IOS XE SD-WAN Software 16.12.5
Cisco IOS XE SD-WAN Software 17.4.1b_CSCVY09777
Cisco IOS XE SD-WAN Software Platform Cisco 1100 Series Industrial Integrated Services Routers
Cisco IOS XE SD-WAN Software Platform Cisco Cloud Services Router 1000V Series
Cisco IOS XE SD-WAN Software Platform Cisco 1000 Series Integrated Services Routers
Cisco IOS XE SD-WAN Software Platform Cisco ASR 1000 Series Aggregation Services Routers
Cisco IOS XE SD-WAN Software Platform Cisco 4000 Series Integrated Services Routers
Cisco IOS XE SD-WAN Software Platform Cisco Integrated Services Virtual Router
Cisco IOS XE SD-WAN Software
Cisco IOS XE SD-WAN Software 16.12.5 when installed on Cisco 1100 Series Industrial Integrated Services Routers
Cisco IOS XE SD-WAN Software 16.12.5 when installed on Cisco Cloud Services Router 1000V Series
Cisco IOS XE SD-WAN Software 16.12.5 when installed on Cisco 1000 Series Integrated Services Routers
Cisco IOS XE SD-WAN Software 16.12.5 when installed on Cisco ASR 1000 Series Aggregation Services Routers
Cisco IOS XE SD-WAN Software 16.12.5 when installed on Cisco 4000 Series Integrated Services Routers
Cisco IOS XE SD-WAN Software 16.12.5 when installed on Cisco Integrated Services Virtual Router
Cisco IOS XE SD-WAN Software 17.4.1b_CSCVY09777 when installed on Cisco Cloud Services Router 1000V Series
Cisco IOS XE SD-WAN Software 17.4.1b_CSCVY09777 when installed on Cisco ASR 1000 Series Aggregation Services Routers
Cisco IOS XE SD-WAN Software 17.4.1b_CSCVY09777 when installed on Cisco 4000 Series Integrated Services Routers
vuln-CVE-2021-34729
CSCvw54120
CSCvw54120
Complete.
CVE-2021-34729
CVRFPID-275036
CVRFPID-281296:277414
CVRFPID-281296:277415
CVRFPID-281296:277416
CVRFPID-281296:277417
CVRFPID-281296:277455
CVRFPID-281296:279747
CVRFPID-283771:277415
CVRFPID-283771:277417
CVRFPID-283771:277455
6.7
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
There are no workarounds that address this vulnerability.
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxesdwan-clicmdinj-7bYX5k3
Cisco IOS XE SD-WAN Software Command Injection Vulnerability