CISCO IOS XE VS IOS SOFTWARE
By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:Īdditionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner.
CISCO IOS XE VS IOS INSTALL
Customers may only install and expect support for software versions and feature sets for which they have purchased a license. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.Ĭisco has released free software updates that address the vulnerability described in this advisory. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. While these mitigations have been deployed and were proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. For devices that are configured with TACACS+ authentication, authorization, and accounting (AAA) command authorization, use this feature to give non-administrative users access to the commands that they require and deny access to all other commands.To disable the CIP feature, use the no cip enable command in the interface configuration mode for the VLAN that CIP is currently enabled on. Disabling the CIP feature eliminates the attack vector for this vulnerability and may be a suitable mitigation until affected devices can be upgraded.There are no workarounds that address this vulnerability. For a complete list of the advisories and links to them, see Cisco Event Response: March 2021 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication. This advisory is part of the March 2021 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. This advisory is available at the following link: A successful exploit could allow the attacker to reconfigure the device.Ĭisco has released software updates that address this vulnerability. An attacker could exploit this vulnerability by issuing the command to retrieve the password for CIP on an affected device. This vulnerability exists because incorrect permissions are associated with the show cip security CLI command. A vulnerability in the CLI command permissions of Cisco IOS and Cisco IOS XE Software could allow an authenticated, local attacker to retrieve the password for Common Industrial Protocol (CIP) and then remotely configure the device as an administrative user.