Multiple Vulnerabilities in Apache Struts 2 Affecting Cisco Products: September 2017

Summary

• On September 5, 2017, the Apache Software Foundation released security bulletins that disclosed three vulnerabilities in the Apache Struts 2 package. Of these vulnerabilities, the Apache Software Foundation classifies one as Critical Severity, one as Medium Severity, and one as Low Severity. For more information about the vulnerabilities, refer to the Details section of this advisory.
  
  Multiple Cisco products incorporate a version of the Apache Struts 2 package that is affected by these vulnerabilities.
  
  The following Snort rule can be used to detect possible exploitation of this vulnerability: Snort SIDs 44315 and 44327 through 44330.
  
  This advisory is available at the following link:
  https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170907-struts2

Affected Products

• For information about whether a product is affected by these vulnerabilities, 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

  The following table lists Cisco products that are affected by the vulnerabilities described in this advisory. If an asterisk (*) appears after a product name, the product is affected by the critical severity vulnerability: CVE-2017-9805, Apache Struts REST plug-in XML processing arbitrary code execution vulnerability. At the time of publication, four Cisco products were known to be affected by CVE-2017-9805.
  
  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.
  
  

  Product	Cisco Bug ID	Fixed Release Availability
  Network Management and Provisioning
  Cisco Digital Media Manager	CSCvf86117	No fix expected (EoSWM) (19-Aug-2016)
  Cisco MXE 3500 Series Media Experience Engines (*)	CSCvf86119	No fix expected (EoSWM) (2-Jan-2017)
  Voice and Unified Communications Devices
  Cisco Hosted Collaboration Solution for Contact Center (*)	CSCvf86143
  Video, Streaming, TelePresence, and Transcoding Devices
  Cisco Video Distribution Suite for Internet Streaming (VDS-IS) (*)	CSCvf86124	Product updated with Struts 2.3.34 (29-Sept-2017)
  Cisco Hosted Services
  Cisco Network Performance Analysis (*)	CSCvf86134	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 vulnerabilities described in this advisory.
  
  Collaboration and Social Media
  

  • 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)
  • Cisco Secure Access Control System (ACS)

  
  Network Management and Provisioning
  

  • Cisco Prime Access Registrar
  • Cisco Prime Central for Service Providers
  • Cisco Prime Collaboration Assurance
  • Cisco Prime Collaboration Provisioning
  • Cisco Prime Home
  • Cisco Prime Infrastructure
  • Cisco Prime LAN Management Solution - Solaris
  • Cisco Prime License Manager
  • Cisco Prime Network Registrar IP Address Manager (IPAM)
  • Cisco Prime Network
  • Cisco Security Manager
  • Cisco Smart Net Total Care - Local Collector appliance
  • Cisco Unified Intelligence Center

  
  Routing and Switching - Enterprise and Service Provider
  

  • Cisco Broadband Access Center for Telco and Wireless

  
  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 MediaSense
  • Cisco SocialMiner
  • 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 Customer Voice Portal
  • 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 Unity Express
  • 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 - Contracts Information System Process Controller
  • Cisco Smart Net Total Care
  • Cisco Spark
  • Cisco Tidal Performance Analyzer
  • Cisco Umbrella
  • Cisco Unified Service Delivery Platform
  • Cisco WebEx Meeting Center - Windows
  • Cisco WebEx Network-Based Recording (NBR) Management

Details

• Apache Struts REST Plug-In XML Processing Arbitrary Code Execution Vulnerability
  
  A vulnerability in the Representational State Transfer (REST) plug-in of Apache Struts could allow an unauthenticated, remote attacker to execute arbitrary code.
  
  The vulnerability is due to the improper deserialization of XML requests by the REST plug-in with the XStream handler of the affected software. An attacker could exploit this vulnerability by sending crafted XML content to a targeted system. A successful exploit could allow the attacker to execute arbitrary code on the system, which could result in a complete system compromise.
  
  This vulnerability has been assigned the following CVE ID: CVE-2017-9805
  
  The Security Impact Rating (SIR) of this vulnerability is Critical.
  
  Apache Struts REST Plug-In Denial of Service Vulnerability
  
  A vulnerability in the REST plug-in for Apache Struts could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.
  
  The vulnerability is due to insufficient validation of user-supplied input by the XStream library in the REST plug-in for the affected application. An attacker could submit crafted XML data to the affected system. A successful exploit could allow the attacker to cause a DoS condition on the targeted system.
  
  This vulnerability has been assigned the following CVE ID: CVE-2017-9793
  
  The SIR of this vulnerability is Medium.
  
  Apache Struts URLValidator Resource Exhaustion Denial of Service Vulnerability
  
  A vulnerability in the URLValidator feature of Apache Struts could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected system.
  
  The vulnerability is due to insufficient validation of user-supplied input when the affected software uses the URLValidator feature to validate URLs. An attacker could exploit this vulnerability by submitting a crafted URL in a form field of an application utilizing an affected version of Apache Struts. An exploit could trigger a condition in the regular expression (regex) processing by the URLValidator that would consume excessive amounts of CPU resources, resulting in a DoS condition.
  
  This vulnerability has been assigned the following CVE ID: CVE-2017-9804
  
  The SIR of this vulnerability is Low.

Workarounds

• Any workarounds that address these vulnerabilities will be documented in the Cisco bugs, which are accessible through the Cisco Bug Search Tool.

Fixed Software

• 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 these vulnerabilities, 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.

Exploitation and Public Announcements

• The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of these vulnerabilities against Cisco products.
  
  For CVE-2017-9805, Apache Struts REST plug-in XML processing arbitrary code execution vulnerability, there are reports of active exploitation in the wild. At the time of publication, this exploitation appears to be primarily scanning activity that is being performed in attempts to identify potentially vulnerable systems.
  

Source

• On September 5, 2017, the Apache Software Foundation publicly disclosed these vulnerabilities in the following security bulletins:
  

  • CVE-2017-9805: http://struts.apache.org/docs/s2-052.html
  • CVE-2017-9804: http://struts.apache.org/docs/s2-050.html
  • CVE-2017-9793: http://struts.apache.org/docs/s2-051.html

URL

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170907-struts2

Revision History

• Version	Description	Section	Status	Date
  1.12	Updated the list of Products Confirmed Not Vulnerable to add Cisco Umbrella.	Products Confirmed Not Vulnerable	Final	2017-October-23
  1.11	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
  1.10	Updated the list of Products Confirmed Not Vulnerable.	Products Confirmed Not Vulnerable	Interim	2017-September-28
  1.9	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
  1.8	Updated the lists of products for Vulnerable, Not Vulnerable, and Under Investigation sections.	Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable	Interim	2017-September-21
  1.7	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
  1.6	Updated the lists of products for Vulnerable, Not Vulnerable, and Under Investigation sections.	Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable	Interim	2017-September-15
  1.5	Updated the lists of products for Vulnerable, Not Vulnerable, and Under Investigation sections.	Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable	Interim	2017-September-14
  1.4	Updated the lists of products for Vulnerable, Not Vulnerable, and Under Investigation sections.	Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable	Interim	2017-September-13
  1.3	Updated the lists of products for Vulnerable, Not Vulnerable, and Under Investigation sections.	Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable	Interim	2017-September-12
  1.2	Updated the lists of products for Vulnerable, Not Vulnerable, and Under Investigation sections.	Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable	Interim	2017-September-11
  1.1	Updated the lists of products for Vulnerable, Not Vulnerable, and Under Investigation sections. Added the SIR value for each vulnerability. Added information about public exploitation.	Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable, Details, Exploitation and Public Announcements	Interim	2017-September-08
  1.0	Initial public release.	-	Interim	2017-September-07

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