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AUSCERT External Security Bulletin Redistribution
ESB-2017.2266
Multiple Vulnerabilities in Apache Struts 2 Affecting Cisco
Products: September 2017
8 September 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco products
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2017-9805 CVE-2017-9804 CVE-2017-9793
Reference: ASB-2017.0139
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170907-struts2
Comment: Cisco advises its products are under investigation. The vulnerable products table will continue to be updated.
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Cisco Security Advisory
Multiple Vulnerabilities in Apache Struts 2 Affecting Cisco Products:
September 2017
Critical
Advisory ID: cisco-sa-20170907-struts2
First Published: 2017 September 7 21:00 GMT
Version 1.0: Interim
Workarounds: No workarounds available
CVE-2017-9793
CVE-2017-9804
CVE-2017-9805
CWE-20
CWE-399
Summary
On September 5, 2017, the Apache Software Foundation released security
bulletins that disclose 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.
This advisory will be updated as additional information becomes available.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170907-struts2
Affected Products
Cisco is investigating its product line to determine which products may be
affected by these vulnerabilities and the impact on each affected product. As
the investigation progresses, Cisco will update this advisory with information
about affected products, including the ID of the Cisco bug for each affected
product.
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.
If a Cisco product is not listed in the Vulnerable Products or Products
Confirmed Not Vulnerable section, it is assumed to not be vulnerable.
Products Under Investigation
The following Cisco products are under active investigation to determine
whether they are 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 Prime Service Catalog
Network Management and Provisioning
Cisco Digital Media Manager
Cisco MXE 3500 Series Media Experience Engines
Cisco Prime Central for Service Providers
Cisco Prime Collaboration Assurance
Cisco Prime Home
Cisco Prime Infrastructure
Cisco Prime LAN Management Solution - Solaris
Cisco Prime Network
Cisco Unified Intelligence Center
Voice and Unified Communications Devices
Cisco Enterprise Chat and Email
Cisco Hosted Collaboration Mediation Fulfillment
Cisco Hosted Collaboration Solution for Contact Center
Cisco Unified Contact Center Enterprise
Cisco Unified E-Mail Interaction Manager
Cisco Unified Intelligent Contact Management Enterprise
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 Video Distribution Suite for Internet Streaming (VDS-IS)
Cisco Hosted Services
Cisco Cloud Web Security
Cisco Deployment Automation Tool
Cisco Network Device Security Assessment Service
Cisco Network Performance Analysis
Cisco Partner Support Service 1.x
Cisco Services Provisioning Platform
Cisco Smart Net Total Care - Contracts Information System Process Controller
Cisco Smart Net Total Care
Cisco Tidal Performance Analyzer
Cisco Unified Service Delivery Platform
Cisco WebEx Network-Based Recording (NBR) Management
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 this publication, no Cisco products
are known to be affected by CVE-2017-9805.
Detailed information about fixed software releases will be documented in the
Cisco bugs that are 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
Voice and Unified Communications Devices
Cisco Emergency Responder CSCvf86138
Products Confirmed Not Vulnerable
Cisco has confirmed that the following products are not affected by the
vulnerabilities described in this advisory.
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 Collaboration Provisioning
Cisco Prime License Manager
Cisco Prime Network Registrar IP Address Manager (IPAM)
Cisco Security Manager
Cisco Smart Net Total Care - Local Collector appliance
Routing and Switching - Enterprise and Service Provider
Cisco Broadband Access Center for Telco and Wireless
Voice and Unified Communications Devices
Cisco Unified Communications Manager IM & Presence Service (formerly CUPS)
Cisco Unified Communications Manager
Cisco Unified Customer Voice Portal
Cisco Unified SIP Proxy Software
Cisco Hosted Services
Cisco Business Video Services Automation Software
Cisco WebEx Meeting Center - Windows
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
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
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
Indicators of Compromise
To help detect possible exploitation of this vulnerability, Cisco has released
Snort SID 44315.
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
Currently, there are no software updates that address the vulnerabilities
described in this advisory. 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 the vulnerability that is described
in this advisory.
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
1.0 Initial public release. Interim 2017-September-07
LEGAL DISCLAIMER
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. CISCO EXPECTS TO UPDATE THIS
DOCUMENT AS NEW INFORMATION BECOMES AVAILABLE.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information or
contain factual errors. The information in this document is intended for end
users of Cisco products.
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