Summary

• A vulnerability in the Cisco Firepower Chassis Manager (FCM) of Cisco FXOS Software could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack against a user of an affected device. 

  The vulnerability is due to insufficient CSRF protections for the FCM interface. An attacker could exploit this vulnerability by persuading a targeted user to click a malicious link. A successful exploit could allow the attacker to send arbitrary requests that could take unauthorized actions on behalf of the targeted user.

  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-fxosfcm-csrf-uhO4e5BZ

Affected Products

• Vulnerable Products

  This vulnerability affects Cisco FXOS Software when it is running on the following platforms:

  • Firepower 2100 Series Appliances when running ASA Software in non-appliance mode
  • Firepower 4100 Series Appliances
  • Firepower 9300 Series Appliances

  Note: Firepower 2100 Series Appliances use Cisco FXOS Software as an underlying operating system, which is included in Cisco ASA Software unified image bundles.

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

  Products Confirmed Not Vulnerable

  Only products listed in the Vulnerable Products 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:

  • Firepower 1000 Series Appliances
  • Firepower 2100 Series Appliances when running ASA Software in appliance mode
  • Firepower 2100 Series Appliances when running FTD Software

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 and Alerts 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

  In the following table(s), the left column lists Cisco software releases. The right column indicates whether a release is affected by the vulnerability described in this advisory and the first release that includes the fix for this vulnerability.

  Firepower 4100 Series and 9300 Series Appliances

  FXOS Software for Firepower 4100 Series and Firepower 9300 Security Appliances: CSCvo94700

  Cisco FXOS Software Release	First Fixed Release for this Vulnerability
  Earlier than 2.2	Migrate to a fixed release.
  2.2	Migrate to a fixed release.
  2.3	Migrate to a fixed release.
  2.4	Migrate to a fixed release.
  2.6	Migrate to a fixed release.
  2.7	Not vulnerable.
  2.8	Not vulnerable.

  Firepower 2100 Series Appliances

  Firepower 2100 Series appliances use Cisco FXOS Software as an underlying operating system, which is included in Cisco ASA Software unified image bundles.

  ASA Software for Firepower 2100 Series: CSCvp75856
  

  Cisco ASA Software Release	First Fixed Release for this Vulnerability
  9.8	Migrate to a fixed release.
  9.9	Migrate to a fixed release.
  9.10	Migrate to a fixed release.
  9.12	Migrate to a fixed release.
  9.13	Not vulnerable.
  9.14	Not vulnerable.

  Note: The Firepower 2100 Series Appliances are affected when running ASA Software in non-appliance mode.

  Note: The Firepower 2100 Series Appliances were first supported on ASA Software release 9.8.

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

• This vulnerability was found during internal security testing.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fxosfcm-csrf-uhO4e5BZ

Revision History

• Version	Description	Section	Status	Date
  1.0	Initial public release.	—	Final	2020-OCT-21

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