Summary

• A vulnerability in the web-based management interface of Cisco Small Business RV110W, RV130, RV130W, and RV215W Series Routers could allow an authenticated, remote attacker to inject arbitrary shell commands that are executed by an affected device.

  The vulnerability is due to insufficient input validation of user-supplied data. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary shell commands or scripts with root privileges on the affected device.

  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-cmd-shell-injection-9jOQn9Dy

Affected Products

• Vulnerable Products

  This vulnerability affects the following Cisco Small Business Routers if they are running a vulnerable firmware release:

  • RV110W Wireless-N VPN Firewall
  • RV130 VPN Router
  • RV130W Wireless-N Multifunction VPN Router
  • RV215W Wireless-N VPN Router

  For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory.

  The web-based management interface of these devices is available through a local LAN connection or the remote management feature. By default, the remote management feature is disabled for these devices.

  To determine whether the remote management feature is enabled for a device, administrators can open the web-based management interface and choose Basic Settings > Remote Management. If the Enable box is checked, remote management is enabled for the device.

  Products Confirmed Not Vulnerable

  Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability.

Workarounds

• There are no workarounds that address this vulnerability.

Fixed Software

• 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

  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 page, 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

  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.

  Fixed Releases

  Customers are advised to upgrade to an appropriate fixed firmware release as indicated in the following table:

  Cisco Product	First Fixed Release
  RV110W Wireless-N VPN Firewall	1.2.2.8
  RV130 VPN Router	1.0.3.55
  RV130W Wireless-N Multifunction VPN Router	1.0.3.55
  RV215W Wireless-N VPN Router	1.3.1.7

  To download the software from the Software Center on Cisco.com, do the following:  

  RV110W and RV215W

  1. Click Browse all.
  2. Choose Routers > Small Business Routers > Small Business RV Series Routers > RV110W Wireless-N VPN Firewall or RV215W Wireless-N VPN Router > Wireless Router Firmware.
  3. Choose a release from the left pane of the RV110W Wireless-N VPN Firewall or RV215W Wireless-N VPN Router page.

  RV130 and RV130W

  1. Click Browse all.
  2. Choose Routers > Small Business Routers > Small Business RV Series Routers > RV130 VPN Router or RV130W Wireless-N Multifunction VPN Router > Small Business Router Firmware. 
  3. Choose a release from the left pane of the RV130 VPN Router or RV130W Wireless-N Multifunction VPN Router page.

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.

Source

• Cisco would like to thank Larryxi of XDSEC for reporting this vulnerability.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cmd-shell-injection-9jOQn9Dy

Revision History

• Version	Description	Section	Status	Date
  1.0	Initial public release.	—	Final	2020-JUL-15

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