Cisco Security AdvisoryCritical
Advisory ID:
cisco-sa-20170909-struts2-rce
First Published:
2017 September 9 17:00 GMT
Last Updated:
2017 October 23 20:24 GMT
Version 1.11:
Workarounds:
No workarounds available
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On September 7, 2017, the Apache Software Foundation released a security bulletin that disclosed a vulnerability in the Freemarker tag functionality of the Apache Struts 2 package. The vulnerability could allow an unauthenticated, remote attacker to execute arbitrary code on an affected system. The Apache Software Foundation classifies the vulnerability as a Medium Severity vulnerability. For more information about this vulnerability, refer to the Details section of this advisory.
Multiple Cisco products incorporate a version of the Apache Struts 2 package that is affected by this vulnerability.
The following Snort rules can be used to detect possible exploitation of this vulnerability: Snort SIDs 44327 through 44330.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170909-struts2-rce
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For information about whether a product is affected by this vulnerability, refer to the Vulnerable Products and Products Confirmed Not Vulnerable sections of this advisory. The Vulnerable Products section includes Cisco bug IDs for each affected product. The bugs are accessible through the Cisco Bug Search Tool and contain additional platform-specific information, including any available workarounds and fixed software releases.
Note: Only Cisco products that include Struts are listed in the "Vulnerable Products" or "Products Confirmed Not Vulnerable" sections. If a Cisco product is not listed, then it does not include Struts and is therefore not affected.
Vulnerable Products
Cisco documents detailed information about fixed software releases in the Cisco bugs listed in this table. The bugs are accessible through the Cisco Bug Search Tool. When planning a software upgrade, customers should review the bugs directly because the bugs will have the most current and up-to-date information.
The following table lists Cisco products that are affected by the vulnerability described in this advisory.
Product Cisco Bug ID Fixed Release Availability Network Management and Provisioning Cisco Digital Media Manager CSCvf89977 No fix expected (EoSWM) (19-Aug-2016) Cisco MXE 3500 Series Media Experience Engines CSCvf89979 No fix expected (EoSWM) (2-Jan-2017) Video, Streaming, TelePresence, and Transcoding Devices Cisco Video Distribution Suite for Internet Streaming (VDS-IS) CSCvf89984 Fix pending Cisco Hosted Services Cisco Network Performance Analysis CSCvf89992 Product updated with Struts 2.3.34 (12-Sept-2017) Products Confirmed Not Vulnerable
Cisco has confirmed that the following products are not affected by the vulnerability described in this advisory.
Collaboration and Social Media
- Cisco SocialMiner
- Cisco Unified MeetingPlace
- Cisco WebEx Meetings Server
Endpoint Clients and Client Software
- Cisco WebEx Management - SuperAdmin Control Panel
Network Application, Service, and Acceleration
- Cisco Data Center Network Manager
Network and Content Security Devices
- Cisco Identity Services Engine (ISE)
Network Management and Provisioning
- Cisco Prime Central for Service Providers
- Cisco Prime Collaboration Provisioning
- Cisco Prime Home
- Cisco Prime LAN Management Solution - Solaris
- Cisco Prime License Manager
- Cisco Prime Network Registrar IP Address Manager (IPAM)
- Cisco Prime Network
- Cisco Unified Intelligence Center
Voice and Unified Communications Devices
- Cisco Business Edition 4000
- Cisco Emergency Responder
- Cisco Enterprise Chat and Email
- Cisco Finesse
- Cisco Hosted Collaboration Mediation Fulfillment
- Cisco Hosted Collaboration Solution for Contact Center
- Cisco MediaSense
- Cisco Unified Communications Manager IM & Presence Service (formerly CUPS)
- Cisco Unified Communications Manager
- Cisco Unified Contact Center Enterprise - Live Data server
- Cisco Unified Contact Center Enterprise
- Cisco Unified Contact Center Express
- Cisco Unified E-Mail Interaction Manager
- Cisco Unified Intelligent Contact Management Enterprise
- Cisco Unified SIP Proxy Software
- Cisco Unified Survivable Remote Site Telephony Manager
- Cisco Unified Web Interaction Manager
- Cisco Unity Connection
- Cisco Virtualized Voice Browser
Video, Streaming, TelePresence, and Transcoding Devices
- Cisco Enterprise Content Delivery System (ECDS)
Cisco Hosted Services
- Cisco Business Video Services Automation Software
- Cisco Cloud Email Security
- Cisco Cloud Web Security
- Cisco Context Service
- Cisco Deployment Automation Tool
- Cisco Network Device Security Assessment Service
- Cisco Partner Support Service 1.x
- Cisco Prime Service Catalog
- Cisco Services Provisioning Platform
- Cisco Smart Net Total Care
- Cisco Spark
- Cisco Tidal Performance Analyzer
- Cisco Umbrella
- Cisco Unified Service Delivery Platform
- Cisco WebEx Network-Based Recording (NBR) Management
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A vulnerability in Apache Struts 2 could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system.
The vulnerability is due to the unsafe use of writable expression values in Freemarker content that is processed by the affected application. An attacker could exploit the vulnerability by adding malicious values to writable expressions that the attacker submits to the affected application for processing. If successful, the attacker could execute arbitrary code in the security context of the affected application on the targeted system.
This vulnerability has been assigned the following CVE ID: CVE-2017-12611
The Security Impact Rating (SIR) of this vulnerability is Critical.
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Any workarounds that address this vulnerability will be documented in the Cisco bugs, which are accessible through the Cisco Bug Search Tool.
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Updates for affected software releases will be published when they are available and information about those updates will be documented in Cisco bugs, which are accessible through the Cisco Bug Search Tool.
When Cisco releases software updates that address this vulnerability, customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:
https://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.
When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts 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.
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 TAC:
https://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
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.
Fixed Releases
To determine the affected and fixed releases for each vulnerable product, refer to the Cisco bug identified for the product in the Vulnerable Products section of this advisory. Cisco bugs are accessible through the Cisco Bug Search Tool.
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of this vulnerability against Cisco products.
Public exploits are available for this vulnerability.
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On September 7, 2017, the Apache Software Foundation publicly disclosed this vulnerability in the following security bulletin: S2-053
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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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Show LessVersion Description Section Status Date 1.11 Updated the list of Products Confirmed Not Vulnerable to add Cisco Umbrella. Products Confirmed Not Vulnerable Final 2017-October-23 1.10 Updated the Vulnerable Products table with information about fixes. Updated Summary, Affected Products, Vulnerable Products, and Fixed Software to "Final status" language. Summary, Affected Products, Vulnerable Products, Fixed Software Final 2017-October-03 1.9 Updated the list of Products Confirmed Not Vulnerable. Products Confirmed Not Vulnerable Interim 2017-September-28 1.8 Updated the lists of products for Vulnerable, Not Vulnerable, and Under Investigation sections. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2017-September-25 1.7 Updated the lists of products for Vulnerable, Not Vulnerable, and Under Investigation sections. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2017-September-21 1.6 Updated the lists of products for Vulnerable, Not Vulnerable, and Under Investigation sections. Under Affected Products added further clarification on products not listed. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2017-September-18 1.5 Updated the lists of products that are and are not vulnerable and the list of products that are under investigation. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2017-September-15 1.4 Updated the lists of products that are and are not vulnerable and the list of products that are under investigation. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2017-September-14 1.3 Updated the lists of products that are and are not vulnerable and the list of products that are under investigation. Also included new Snort signatures. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2017-September-13 1.2 Updated the lists of products that are and are not vulnerable and the list of products that are under investigation. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2017-September-12 1.1 Updated the lists of products that are and are not vulnerable and the list of products that are under investigation. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2017-September-11 1.0 Initial public release. — Interim 2017-September-09
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