Cisco Identity Services Engine Authorization Bypass and Cross-Site Scripting Vulnerabilities – Source:sec.cloudapps.cisco.com

Medium

Summary

• Multiple vulnerabilities in Cisco Identity Services Engine (ISE) could allow a remote attacker to conduct an authorization bypass attack and cross-site scripting (XSS) attacks against a user of the web-based management interface on an affected device.

  For more information about these vulnerabilities, see the Details section of this advisory.

  Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

  This advisory is available at the following link:
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-auth-bypass-BBRf7mkE

Affected Products

• At the time of publication, these vulnerabilities affected Cisco ISE, regardless of device configuration.

  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.

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

Details

• The vulnerabilities are not dependent on one another. Exploitation of one of the vulnerabilities is not required to exploit another vulnerability. In addition, a software release that is affected by one of the vulnerabilities may not be affected by the other vulnerabilities.

  Details about the vulnerabilities are as follows:

  CVE-2024-20537: Cisco ISE Authorization Bypass Vulnerability

  A vulnerability in the web-based management interface of Cisco ISE could allow an authenticated, remote attacker to bypass the authorization mechanisms for specific administrative functions.

  This vulnerability is due to a lack of server-side validation of Administrator permissions. An attacker could exploit this vulnerability by submitting a crafted HTTP request to an affected system. A successful exploit could allow the attacker to conduct administrative functions beyond their intended access level. To exploit this vulnerability, an attacker would need Read-Only Administrator credentials.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  Bug ID(s): CSCwj28643
  CVE ID: CVE-2024-20537
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 6.5
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

  CVE-2024-20538: Cisco ISE Cross-Site Scripting Vulnerability

  A vulnerability in the web-based management interface of Cisco ISE could allow an unauthenticated, remote attacker to conduct an XSS attack against a user of the interface.

  This vulnerability exists because the web-based management interface does not sufficiently validate user-supplied input. An attacker could exploit this vulnerability by persuading a user of the interface on an affected system to click a crafted 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.

  Bug ID(s): CSCwj96002
  CVE ID: CVE-2024-20538
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 6.1
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

  CVE-2024-20539: Cisco ISE Stored Cross-Site Scripting Vulnerability

  A vulnerability in the web-based management interface of Cisco ISE could allow an authenticated, remote attacker to conduct a stored XSS attack against a user of the interface.

  This vulnerability exists because the web-based management interface does not sufficiently validate user-supplied input. An attacker could exploit this vulnerability by injecting malicious code into specific pages of the interface. 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. To exploit this vulnerability, the attacker would need valid administrative credentials on an affected device.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  Bug ID(s): CSCwj29451
  CVE ID: CVE-2024-20539
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 4.8
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Workarounds

• There are no workarounds that address these vulnerabilities.

Fixed Software

• 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.

  Fixed Releases

  At the time of publication, the release information in the following table was accurate. See the Details section in the bug IDs at the top of this advisory for the most complete and current information.

  The left column lists Cisco software releases. The center and right columns indicate whether a release was affected by these vulnerabilities and the first release that includes the fix for these vulnerabilities.

  Cisco ISE Release	First Fixed Release for CVE-2024-20537 and CVE-2024-20539	First Fixed Release for CVE-2024-20538
  3.0 and earlier	Migrate to a fixed release.	Migrate to a fixed release.
  3.1	3.1P9	3.1P10 (Jan 2025)
  3.2	3.2P7	3.2P7
  3.3	3.3P3	3.3P4
  3.4	Not vulnerable.	Not vulnerable.

  For instructions on upgrading a device, see the Upgrade Guides 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.

Exploitation and Public Announcements

• The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

Source

• CVE-2024-20537 and CVE-2024-20539: These vulnerabilities were found during the resolution of a Cisco TAC support case.

  CVE-2024-20538: Cisco would like to thank Jakub “kubolos231” Sajniak and Viet Hoang Nguyen of STM Cyber for reporting this vulnerability.

Cisco Security Vulnerability Policy

• 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.

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Related to This Advisory

• Cross-Site Scripting

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-auth-bypass-BBRf7mkE

Revision History

• Version	Description	Section	Status	Date
  1.0	Initial public release.	–	Final	2024-NOV-06

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