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AUSCERT External Security Bulletin Redistribution
ESB-2015.1836
Cisco TelePresence IP VCR Cross-Site Request Forgery Vulnerability
10 July 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco TelePresence IP VCR Series
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Cross-site Request Forgery -- Remote with User Interaction
Resolution: Mitigation
CVE Names: CVE-2015-4256
Original Bulletin:
http://tools.cisco.com/security/center/viewAlert.x?alertId=39800
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Vulnerability Alert
Cisco TelePresence IP VCR Cross-Site Request Forgery Vulnerability
Threat Type: CWE-352: Cross-Site Request Forgery (CSRF)
IntelliShield ID: 39800
Version: 1
First Published: 2015 July 09 21:28 GMT
Last Published: 2015 July 09 21:28 GMT
Port: Not available
CVE: CVE-2015-4256
Urgency: Unlikely Use
Credibility: Confirmed
Severity: Mild Damage
CVSS Base: 4.3
CVSS Version 2.0
CVSS Temporal: 4.1
Version Summary: Cisco TelePresence IP VCR Series contains a vulnerability
that could allow an unauthenticated, remote attacker to conduct cross-site
request forgery attacks. Updates are not available.
Description
A vulnerability in the Cisco TelePresence IP VCR Series could allow an
unauthenticated, remote attacker to execute unwanted actions.
The vulnerability is due to insufficient cross-site request forgery (CSRF)
protection. An attacker could exploit this vulnerability by tricking the user
of a web application into executing an adverse action.
Cisco has confirmed the vulnerability; however, software updates are not
available.
Warning Indicators
At the time this alert was first published, Cisco TelePresence IP VCR Series
Release 3.0(1.27) was vulnerable. Later releases of Cisco TelePresence IP VCR
Series may also be vulnerable.
IntelliShield Analysis
To exploit the vulnerability, the attacker may provide a link that directs a
user to a malicious site and use misleading language or instructions to
persuade the user to follow the provided link.
Cisco indicates through the CVSS score that functional exploit code exists;
however, the code is not known to be publicly available.
Vendor Announcements
Cisco has released bug ID CSCuu90736 for registered users, which contains
additional details and an up-to-date list of affected product versions.
Impact
An unauthenticated, remote attacker could exploit this vulnerability to take
unauthorized actions on behalf of a targeted user. A successful exploit could
allow the attacker to conduct further attacks.
Technical Information
The vulnerability is due to insufficient CSRF protection by the affected
software.
An unauthenticated, remote attacker could exploit this vulnerability by
convincing a user to follow a malicious link. A successful exploit could allow
the attacker to submit arbitrary requests to the affected device via the web
browser with the privileges of the user, which could be used to conduct
further attacks.
Safeguards
Administrators are advised to contact the vendor regarding future updates and
releases.
Users should verify that unsolicited links are safe to follow.
For additional information about cross-site request forgery attacks and
potential mitigation methods, see the Cisco Applied Mitigation Bulletin
Understanding Cross-Site Request Forgery Threat Vectors.
Administrators are advised to monitor affected systems.
Patches/Software
Software updates are not available.
Alert History
Initial Release
Product Sets
The security vulnerability applies to the following combinations of products.
Primary Products:
Cisco Cisco TelePresence IP VCR Series 3.0 1.27
Associated Products:
N/A
Alerts and bulletins on the Cisco Security Intelligence Operations Portal are
highlighted by analysts in the Cisco Threat Operations Center and represent a
subset of the comprehensive content that is available through Cisco Security
IntelliShield Alert Manager Service. This customizable threat and
vulnerability alert service provides security staff with access to timely,
accurate, and credible information about threats and vulnerabilities that may
affect their environment.
LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to individual
users; users may value alerts differently based upon their network
configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED
THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF
GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED
THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION
IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE
TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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