A vulnerability in the External RESTful Services (ERS) API of Cisco Identity Services Engine (ISE) Software could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface of an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by persuading an authenticated administrator of the web-based management interface to click a malicious link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. 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-ise-xss-twLnpy3M
A vulnerability in the External RESTful Services (ERS) API of Cisco Identity Services Engine (ISE) Software could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface of an affected device.
This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by persuading an authenticated administrator of the web-based management interface to click a malicious link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.
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-ise-xss-twLnpy3M
At the time of publication, this vulnerability affected Cisco ISE Software if ERS was enabled.
For information about which Cisco software releases were vulnerable at the time of publication, see the Fixed Software section of this advisory. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
For Cisco ISE releases 2.0 to 2.7, do the following:
For Cisco ISE Release 3.0, do the following:
For Cisco ISE releases 3.1 and 3.2, do the following:
Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability.
There are no workarounds that address this vulnerability. However, administrators may disable the affected feature.
To disable ERS in Cisco ISE releases 2.0 to 2.7, do the following:
To disable ERS in Cisco ISE Release 3.0, do the following:
To disable ERS in Cisco ISE releases 3.1 and 3.2, do the following:
While this mitigation has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. 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. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
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.
At the time of publication, the release information in the following table(s) was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
The left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability that is described in this advisory and which release included the fix for this vulnerability.
| Cisco ISE Software Release | First Fixed Release |
|---|---|
| 2.41 and earlier | Migrate to fixed release. |
| 2.62 | Migrate to fixed release. |
| 2.72 | 2.7P8 (Nov 2022) |
| 3.02 | 3.0P7 (Feb 2023) |
| 3.1 | 3.1P4 |
| 3.22 | 3.2P1 (Jan 2023) |
For instructions on upgrading your device, see the Upgrade Guides located on the Cisco Identity Service Engine support page.
The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.
The Cisco PSIRT is aware that proof-of-concept exploit code for the vulnerability that is described in this advisory will become available after software fixes are released. Public reports of the vulnerability, including a description and classification without specific technical details, will become available after this advisory is published.
The Cisco PSIRT is not aware of any malicious use of the vulnerability that is described in this advisory.
Cisco would like to thank Davide Virruso of Yoroi for reporting this vulnerability.
To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
| Version | Description | Section | Status | Date |
|---|---|---|---|---|
| 1.2 | Updated hot patch information. | Fixed Releases | Final | 2022-NOV-14 |
| 1.1 | Added mitigation information. Updated expected release date for 2.7P8. | Workarounds and Fixed Releases | Final | 2022-OCT-31 |
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