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AUSCERT External Security Bulletin Redistribution
ESB-2013.1089
Cisco TelePresence System Default Credentials Vulnerability
8 August 2013
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco TelePresence
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2013-3454
Original Bulletin:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130807-tp
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Cisco Security Advisory
Cisco TelePresence System Default Credentials Vulnerability
Advisory ID: cisco-sa-20130807-tp
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130807-tp
Revision 1.1
Last Updated 2013 August 7 16:51 UTC (GMT)
For Public Release 2013 August 7 16:00 UTC (GMT)
Contents
Summary
Affected Products
Details
Vulnerability Scoring Details
Impact
Software Versions and Fixes
Workarounds
Obtaining Fixed Software
Exploitation and Public Announcements
Status of This Notice: Final
Distribution
Revision History
Cisco Security Procedures
Summary
A vulnerability in Cisco TelePresence System could allow a remote attacker to
access the web server via a user account that is created with default
credentials.
The vulnerability is due to a default user account being created at
installation time. An attacker could exploit this vulnerability by remotely
accessing the web server and using the default account credentials. An exploit
could allow the attacker to log in with the default credentials, which gives
them full administrative rights to the system.
Workarounds that mitigate this vulnerability are available.
This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130807-tp
Affected Products
Vulnerable Products
Cisco TelePresence System Series 500, 13X0, 1X00, 3X00, and 30X0 running
CiscoTelePresence System Software Releases 1.10.1 and prior are affected by
this vulnerability. Cisco TelePresence TX 9X00 Series running Cisco
TelePresence System Software Releases 6.0.3 and prior are affected by this
vulnerability.
Products Confirmed Not Vulnerable
Cisco TelePresence Multipoint Switch (CTMS), Cisco TelePresence Recording
Server (CTRS), and Cisco TelePresence Manager (CTSMan) are not affected by this
vulnerability.
No other Cisco products are currently known to be affected by this
vulnerability.
Details
The Cisco TelePresence solution allows an immersive, in-person communication
and collaboration over the network with colleagues, prospects, and partners,
even when they are located in opposite hemispheres.
Cisco TelePresence System Software includes a password recovery administrator
account that is enabled by default. Successful exploitation of this
vulnerability could allow a remote attacker to use these default credentials
to modify the system configuration and settings and take full control of the
affected system. An attacker could use this account to modify the system
configuration and settings via an HTTPS session.
This vulnerability is documented in Cisco Bug ID CSCui43128 (registered
customers only), and has been assigned the CVE identifier CVE-2013-3454.
Vulnerability Scoring Details
Cisco has scored the vulnerability 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
CSCui43128 - Cisco TelePresence System Default Credentials Vulnerability
Calculate the environmental score of CSCui43128
CVSS Base Score - 10.0
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
CVSS Temporal Score - 9.5
Exploitability High
Remediation Level Workaround
Report Confidence Confirmed
Impact
Successful exploitation of this vulnerability could allow a remote attacker to
use the default credentials for the password recovery account to modify the
system configuration and settings and take full control of the affected system.
Software Versions and Fixes
Cisco will make available fixed software at a later date.
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.
Workarounds
Workarounds exist to mitigate this vulnerability.
For customers using Cisco TelePresence codecs registered with Cisco Unified
Communications Manager (Unified CM), the following workaround exists:
1. Proceed to Cisco Unified CM Administration and select Device > Phone,
search and select the configured Cisco TelePresence unit.
2. Under the Secure Shell Information (ssh), change the ssh helpdesk user name
from the default helpdesk to pwrecovery, and then choose an alternate password.
This will overwrite the pwrecovery account stored on the Cisco TelePresence
unit, and permit changing the password from the default to one created by the
Cisco Unfied CM administrator.
Note: Password recovery will continue to function through ssh as designed, but
the user is required to have physical access to the Cisco TelePresence unit in
order to execute a recovery. The ssh access will have to use the updated
password information for the pwrecovery account.
3. Reboot the Cisco TelePresence codec to download the updated Cisco Unified
CM configuration.
This workaround is persistent because the codec downloads the configuration
after every reboot.
As a result, the GUI access would require a user to know either the
administrator or newly configured pwrecovery credentials as configured in
Cisco Unified CM. Default pwrecovery credentials will cease to function.
For customers with non-Cisco Unified CM registered Cisco TelePresence codecs,
the workaround requires manual intervention on the affected system. Please
contact the Cisco Technical Assistance Center (TAC) for instructions on how
to implement this workaround.
Obtaining Fixed Software
Cisco will make available fixed software at a later date. 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
Potential exploitation was reported directly to Cisco by a single customer.
The PSIRT is not aware of any widespread exploitation or public announcements
of this vulnerability.
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-20130807-tp
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 1.1 2013-August-07 Change to CVSSv2 scoring
Revision 1.0 2013-August-07 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/en/US/products/products_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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