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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3818.3 Cisco Identity Services Engine Vulnerabilities 23 December 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Identity Services Engine Publisher: Cisco Systems Operating System: Cisco Impact/Access: Root Compromise -- Existing Account Execute Arbitrary Code/Commands -- Remote with User Interaction Cross-site Scripting -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2020-27122 CVE-2020-26083 CVE-2020-3551 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-xxs-pkjCmq9d https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-xss-euRCwX9 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-priv-esc-fNZX8hHj Revision History: December 23 2020: Vendor updated advisory cisco-sa-ise-xss-euRCwX9 November 24 2020: Vendor issued minor updates November 5 2020: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Identity Services Engine Cross-Site Scripting Vulnerability Priority: Medium Advisory ID: cisco-sa-ise-xxs-pkjCmq9d First Published: 2020 November 4 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvu84773 CVE-2020-26083 CWE-79 Summary o A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker with administrative credentials to conduct a cross-site scripting (XSS) attack against a user of the interface. The vulnerability exists because the web-based management interface does not properly 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 interface or access sensitive, browser-based information. To exploit this vulnerability, an attacker would need to have valid administrative credentials. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-ise-xxs-pkjCmq9d Affected Products o Vulnerable Products At the time of publication, this vulnerability affected all releases of Cisco ISE. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Workarounds o There are no workarounds that address this vulnerability. Fixed Software o 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 For information about fixed software releases, see the Details section in the bug ID(s) at the top of this advisory. Exploitation and Public Announcements o 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 o This vulnerability was found during internal security testing. Cisco Security Vulnerability Policy o 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. Related to This Advisory o Cross-Site Scripting URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-ise-xxs-pkjCmq9d Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2020-NOV-04 | +----------+---------------------------+----------+--------+--------------+ - -------------------------------------------------------------------------------- Cisco Identity Services Engine Cross-Site Scripting Vulnerability Priority: Medium Advisory ID: cisco-sa-ise-xss-euRCwX9 First Published: 2020 November 4 16:00 GMT Last Updated: 2020 December 22 13:10 GMT Version 1.2: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvv01681 CVE Names: CVE-2020-3551 CWEs: CWE-79 Summary o A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface of an affected device. The vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user of an affected interface 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. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-xss-euRCwX9 Affected Products o Vulnerable Products At the time of publication, this vulnerability affected Cisco ISE releases 2.6 and 2.7. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Workarounds o There are no workarounds that address this vulnerability. Fixed Software o 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, Cisco ISE releases 2.6 Patch8 and later and Cisco ISE releases 3.0 and later contained the fix for this vulnerability. Important: Cisco ISE 3.0 is a smart licensing-only solution that requires communication to the cloud. At the time of publication, it does not support air-gapped networks. Customers on ISE 2.7 with air-gapped networks are advised to wait for the upcoming patch releases for Cisco ISE 2.7 Patch3 which will include the fix for this vulnerability. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. Exploitation and Public Announcements o 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 o Cisco would like to thank Pawel Gocyla of ING Tech Poland for reporting this vulnerability. Cisco Security Vulnerability Policy o 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. Related to This Advisory o Cross-Site Scripting URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-xss-euRCwX9 Revision History o +---------+-----------------------------+----------+--------+-------------+ | Version | Description | Section | Status | Date | +---------+-----------------------------+----------+--------+-------------+ | 1.2 | Added Release 2.6 Patch8. | Fixed | Final | 2020-DEC-22 | | | | Releases | | | +---------+-----------------------------+----------+--------+-------------+ | 1.1 | Added fix information for | Fixed | Final | 2020-NOV-23 | | | air-gapped networks. | Releases | | | +---------+-----------------------------+----------+--------+-------------+ | 1.0 | Initial public release. | - | Final | 2020-NOV-04 | +---------+-----------------------------+----------+--------+-------------+ - -------------------------------------------------------------------------------- Cisco Identity Services Engine Privilege Escalation Vulnerability Priority: Medium Advisory ID: cisco-sa-ise-priv-esc-fNZX8hHj First Published: 2020 November 4 16:00 GMT Last Updated: 2020 November 22 21:34 GMT Version 1.1: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvv08885 CVE Names: CVE-2020-27122 CWEs: CWE-266 CVSS Score: 4.4 AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:X/RL:X/RC:X Summary o A vulnerability in the Microsoft Active Directory integration of Cisco Identity Services Engine (ISE) could allow an authenticated, local attacker to elevate privileges on an affected device. To exploit this vulnerability, an attacker would need to have a valid administrator account on an affected device. The vulnerability is due to incorrect privilege assignment. An attacker could exploit this vulnerability by logging in to the system with a crafted Active Directory account. A successful exploit could allow the attacker to obtain root privileges on an affected device. Note: Only devices that have the CLI configured to support Active Directory authentication are affected by this vulnerability. CLI support for Active Directory authentication is disabled by default. All other uses of Active Directory Domain Services or Active Directory Certificate Services within ISE are not affected. 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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-ise-priv-esc-fNZX8hHj Affected Products o Vulnerable Products At the time of publication, this vulnerability affected Cisco ISE releases 2.6 and 2.7. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. 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 Cisco ISE releases 2.2, 2.2.1, 2.3, and 2.4 because the CLI Active Directory capability did not exist in those releases. Details o In order for exploitation to occur, a user with administrator access to the CLI must do both of the following: Enable the Active Directory CLI capability. Enable the Active Directory CLI authentication capability (disabled by default) with knowledge of an existing Active Directory domain. Workarounds o There are no workarounds that address this vulnerability. However, administrators can disable the Active Directory CLI capability as a mitigation. Note: A user with administrator access to the CLI will be able to re-enable it. Fixed Software o 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, Cisco ISE releases 3.0.0 and later contained the fix for this vulnerability. Important: Cisco ISE 3.0 is a smart licensing-only solution that requires communication to the cloud. At the time of publication, it does not support air-gapped networks. Customers with air-gapped networks are advised to wait for the upcoming patch releases for Cisco ISE releases 2.6 and 2.7, which will include the fix for this vulnerability. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. Exploitation and Public Announcements o 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 o This vulnerability was found during internal security testing. Cisco Security Vulnerability Policy o 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. URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-ise-priv-esc-fNZX8hHj Revision History o +---------+-------------------------+--------------+--------+-------------+ | Version | Description | Section | Status | Date | +---------+-------------------------+--------------+--------+-------------+ | | Added configuration | Summary, | | | | | requirements, | Affected | | | | | vulnerable and not | Products, | | | | 1.1 | vulnerable releases, | Details, | Final | 2020-NOV-22 | | | exploitation details, a | Workarounds, | | | | | mitigation, and fix | Fixed | | | | | information for | Releases | | | | | air-gapped networks. | | | | +---------+-------------------------+--------------+--------+-------------+ | 1.0 | Initial public release. | - | Final | 2020-NOV-04 | +---------+-------------------------+--------------+--------+-------------+ - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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