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AUSCERT External Security Bulletin Redistribution
Cisco TelePresence Video Communication Server Expressway
Information Disclosure Vulnerability
14 August 2015
AusCERT Security Bulletin Summary
Product: Cisco TelePresence Video Communication Server Expressway
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Access Confidential Data -- Existing Account
CVE Names: CVE-2015-4320
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Cisco TelePresence Video Communication Server Expressway Information
Threat Type: CWE-200: Information Leak / Disclosure
IntelliShield ID: 40441
First Published: 2015 August 13 20:14 GMT
Last Published: 2015 August 13 20:14 GMT
Port: Not available
Urgency: Unlikely Use
CVSS Base: 4.0
CVSS Version 2.0
CVSS Temporal: 3.3
Version Summary: Cisco TelePresence Video Communication Server Expressway
contains a vulnerability that could allow an authenticated, remote attacker to
access sensitive information on a targeted device. Updates are available.
A vulnerability in Configuration Log File of the Cisco TelePresence Video
Communication Server (VCS) Expressway could allow an authenticated, remote
attacker to obtain sensitive information stored on an affected system.
The vulnerability is due to the inclusion of sensitive information in certain
log files. An attacker could exploit this vulnerability by viewing the
sensitive information in the vulnerable log files.
Cisco has confirmed the vulnerability and released software updates.
At the time this alert was first published, Cisco VCS Expressway version
X8.5.2 was vulnerable. Later releases of Cisco VCS Expressway may also be
To exploit this vulnerability, an attacker must authenticate to the targeted
device. This access requirement reduces the likelihood of a successful
Cisco indicates through the CVSS score that functional exploit code exists;
however, the code is not known to be publicly available.
Cisco has released bug ID CSCuv12340 for registered users, which contains
additional details and an up-to-date list of affected product versions.
An authenticated, remote attacker could exploit this vulnerability to gain
access to sensitive information in certain log files. A successful exploit
could be leveraged to conduct further attacks.
The vulnerability is due to improper logging of password hashes in the
Configuration Log File of the affected software when passwords are changed
through the web interface.
An authenticated, remote attacker could exploit this vulnerability to view
sensitive information in the vulnerable log files stored on a targeted system.
A successful exploit could be leveraged to conduct further attacks.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to allow only privileged users to access
administration or management systems.
Administrators are advised to monitor affected systems.
Cisco customers with active contracts can obtain updates through the Software
Center at the following link: Cisco. Cisco customers without contracts can
obtain upgrades by contacting the Cisco Technical Assistance Center at
1-800-553-2447 or 1-408-526-7209 or via email at email@example.com.
The security vulnerability applies to the following combinations of products.
Cisco Cisco TelePresence Video Communication Server (VCS) Expressway X8.5 .2
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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