Cisco Security Advisory

Multiple Vulnerabilities in Cisco Identity Services Engine

Advisory ID: cisco-sa-20131023-ise

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-ise

Revision 1.0

For Public Release 2013 October 23 16:00  UTC (GMT)


Summary

Cisco Identity Services Engine (ISE) contains the following vulnerabilities:

  • Cisco ISE Authenticated Arbitrary Command Execution Vulnerability
  • Cisco ISE Support Information Download Authentication Bypass Vulnerability
These vulnerabilities are independent of each other; a release that is affected by one of the vulnerabilities may not be affected by the other.

Successful exploitation of Cisco ISE Authenticated Arbitrary Command Execution Vulnerability may allow an authenticated remote attacker to execute arbitrary code on the underlying operating system.

Successful exploitation of Cisco ISE Support Information Download Authentication Bypass Vulnerability could allow an attacker to obtain sensitive information including administrative credentials.


Cisco has released free software updates that address these vulnerabilities. Workarounds that mitigate these vulnerabilities are not available. This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-ise

Note: Cisco ISE Software is also affected by the Apache Struts Command Execution Vulnerability described in a separate Cisco Security Advisory available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-struts2

Cisco ISE customers should consult that advisory before making a decision on the upgrade path.

Affected Products

Vulnerable Products

All versions of Cisco ISE Software running on supported appliances and virtual machine may affected by these vulnerabilities. Consult the "Software Versions and Fixes" section of this security advisory for more information about the affected versions.

The following methods can be used to determine which version of the Cisco ISE is installed:

  • From the Cisco ISE command-line interface (CLI), issue the show version command. The following example shows a Cisco ISE running software version 1.2 (1.2.0.899 is the exact number of the build) and with patch 1 and patch 2 installed:
    ise12/admin# show version

    [...]

    Copyright (c) 2005-2013 by Cisco Systems, Inc.
    All rights reserved.
    Hostname: ise12


    Version information of installed applications
    ---------------------------------------------

    Cisco Identity Services Engine
    ---------------------------------------------
    Version      : 1.2.0.899
    Build Date   : Wed Jul 24 09:37:31 2013
    Install Date : Fri Jul 26 17:47:28 2013

    Cisco Identity Services Engine Patch
    ---------------------------------------------
    Version      : 1
    Install Date : Mon Aug 05 09:27:01 2013

    Cisco Identity Services Engine Patch
    ---------------------------------------------
    Version      : 2
    Install Date : Thu Sep 19 15:48:56 2013

  • From the Cisco ISE web-based interface, log in and click the Server Information link in the top right corner of the screen.

Note: Cisco ISE Software is also affected by the Apache Struts Command Execution Vulnerability described in a separate Cisco security advisory available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-struts2

Cisco ISE customers should consult that advisory before making a decision on the upgrade path.

Products Confirmed Not Vulnerable

No other Cisco products are currently known to be affected by these vulnerabilities.

Details

The Cisco Identity Services Engine provides an attribute-based access control solution that combines authentication, authorization, and accounting (AAA), posture, profiling, and guest management services on a single platform.

Cisco ISE Authenticated Arbitrary Command Execution Vulnerability

A vulnerability in the web framework of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system.

The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by injecting arbitrary commands and execute the affected function. An exploit could allow the attacker to run arbitrary commands on the affected system with the privilege of the root user.

Note: This vulnerability can be exploited over the default management TCP port 443. A full three-way handshake is needed to exploit this vulnerability.

This vulnerability is documented in Cisco bug ID CSCuh81511 (registered customers only) and has been assigned Common Vulnerabilities and Exposure (CVE) ID CVE-2013-5530.

Cisco ISE Support Information Download Authentication Bypass Vulnerability

A vulnerability in the implementation of the authentication code that is used to validate requests to download a product support bundle could allow an unauthenticated, remote attacker to download a full product support bundle.

The vulnerability is due to an error in the logic that is used to validate support bundle access requests. An attacker could exploit this vulnerability by sending a crafted request to the vulnerable system. An exploit could allow an attacker to obtain a full copy of the product configuration or other sensitive information including administrative credentials.

Note: This vulnerability can be exploited over the default management port TCP port 443. A full three-way handshake is needed to exploit this vulnerability.

This vulnerability is documented in Cisco bug ID CSCty20405 (registered customers only) and has been assigned CVE ID CVE-2013-5531

Vulnerability Scoring Details

Cisco has scored the vulnerabilities in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this security advisory is in accordance with CVSS version 2.0.

CVSS is a standards-based scoring method that conveys vulnerability severity and helps organizations determine the urgency and priority of a response.

Cisco has provided a base and temporal score. Customers can also compute environmental scores that help determine the impact of the vulnerability in their own networks.

Cisco has provided additional information regarding CVSS at the following link:

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

Cisco has also provided a CVSS calculator to compute the environmental impact for individual networks at the following link:

http://intellishield.cisco.com/security/alertmanager/cvss



CSCuh81511 - Cisco ISE Authenticated Arbitrary Command Execution Vulnerability

Calculate the environmental score of CSCuh81511

CVSS Base Score - 9.0

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

Single

Complete

Complete

Complete

CVSS Temporal Score - 7.4

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed




CSCty20405 - Cisco ISE Support Information Download Authentication Bypass Vulnerability

Calculate the environmental score of CSCty20405

CVSS Base Score - 5.0

Access Vector

Access Complexity

Authentication

Confidentiality Impact

Integrity Impact

Availability Impact

Network

Low

None

Partial

None

None

CVSS Temporal Score - 4.1

Exploitability

Remediation Level

Report Confidence

Functional

Official-Fix

Confirmed


Impact

Successful exploitation of Cisco ISE Authenticated Arbitrary Command Execution Vulnerability may allow an authenticated remote attacker to execute arbitrary code on the underlying operating system.

Successful exploitation of Cisco ISE Support Information Download Authentication Bypass Vulnerability could allow an attacker to obtain sensitive information including administrative credentials.

Software Versions and Fixes

When considering software upgrades, customers are advised to consult the Cisco Security Advisories, Responses, and Notices archive at http://www.cisco.com/go/psirt and review subsequent advisories 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.

The following table provides first fixed release information for the affected Cisco ISE releases. The last row of the table provides the release version that includes the fix for all the vulnerabilities described in this advisory. Customers should upgrade to these releases or later.

  1.0
1.1.0
1.1.1
 1.1.2 1.1.3
1.1.4
1.2
Cisco ISE Authenticated Arbitrary Command Execution Vulnerability  - CSCuh81511
Migrate to 1.1.0.665-5 or later
1.1.0.665-5  1.1.1.268-7  1.1.2.145-10  1.1.3.124-7 
 1.1.4.218-7 
1.2.0.899-2 
Cisco ISE Support Information Download Authentication Bypass Vulnerability - CSCty20405
Migrate to 1.1.1 or later
Migrate to 1.1.1 or later
Not affected
Not Affected
Not Affected
Not Affected
Not Affected
Recommended releases that fix all the vulnerabilities described in this advisory
Migrate to 1.1.1.268-7  or later
Migrate to 1.1.1 or later
1.1.1.268-7 or later
1.1.2.145-10 or later
1.1.3.124-7 or later
 1.1.4.218-7 or later 
1.2.0.899-2 or later

Note
: Cisco ISE is also affected by the Apache Struts Command Execution Vulnerability described in a separate Cisco Security Advisory available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-struts2

Cisco ISE customers should consult that advisory before making decision on the upgrade path.

Workarounds

There are no workarounds that mitigate the vulnerabilities that are described in this security advisory.

Obtaining Fixed Software

Cisco has released free software updates that address the vulnerabilities described in this advisory. Prior to deploying software, customers are advised to consult their maintenance providers or check the software for feature set compatibility and known issues that are specific to their environments.

Customers may only install and expect support for feature sets they have purchased. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license at http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html.

Customers with Service Contracts

Customers with contracts should obtain upgraded software through their regular update channels. For most customers, upgrades should be obtained through the Software Navigator on Cisco.com at http://www.cisco.com/cisco/software/navigator.html.

Customers Using Third-Party Support Organizations

Customers with Cisco products that are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers, should contact that organization for assistance with the appropriate course of action.

The effectiveness of any workaround or fix depends on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Because of the variety of affected products and releases, customers should consult their service providers or support organizations to ensure that any applied workaround or fix is the most appropriate in the intended network before it is deployed.

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 Technical Assistance Center (TAC):

  • +1 800 553 2447 (toll free from within North America)
  • +1 408 526 7209 (toll call from anywhere in the world)
  • e-mail: tac@cisco.com

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. Customers without service contracts should request free upgrades through the TAC.

Refer to Cisco Worldwide Contacts at http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html for additional TAC contact information, including localized telephone numbers, instructions, and e-mail addresses for support in various languages.

Exploitation and Public Announcements

The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

The Cisco ISE Authenticated Arbitrary Command Execution Vulnerability was reported to Cisco by Jan Kadijk from Warpnet and later by Stephen Hosom. This vulnerability is tracked under CERT Vulnerability Note VU#952422.

The Cisco ISE Support Information Download Authentication Bypass Vulnerability was found during the resolution of a support case.

Status of This Notice: Final

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.

A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors.


Distribution

This advisory is posted on Cisco Security Intelligence Operations at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-ise

Additionally, a text version of this advisory is clear signed with the Cisco PSIRT PGP key and circulated among the following e-mail addresses:

  • cust-security-announce@cisco.com
  • first-bulletins@lists.first.org
  • bugtraq@securityfocus.com
  • vulnwatch@vulnwatch.org
  • cisco@spot.colorado.edu
  • cisco-nsp@puck.nether.net
  • full-disclosure@lists.grok.org.uk

Future updates of this advisory, if any, will reside on Cisco.com but may not be announced on mailing lists. Users can monitor this advisory's URL for any updates.


Revision History

Revision 1.0 2013-October-23 Initial public release.

Cisco Security Procedures

Complete information about reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco is available on Cisco.com at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html. This web page includes instructions for press inquiries regarding Cisco Security Advisories. All Cisco Security Advisories are available at http://www.cisco.com/go/psirt.


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