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AUSCERT External Security Bulletin Redistribution
Cisco TelePresence Video Communication Server Expressway
Information Disclosure Vulnerability
13 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-2015-4314
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Cisco TelePresence Video Communication Server Expressway Information
Threat Type: CWE-200: Information Leak / Disclosure
IntelliShield ID: 40439
First Published: 2015 August 12 19:19 GMT
Last Published: 2015 August 12 19:19 GMT
Port: Not available
Urgency: Unlikely Use
Severity: Mild Damage
CVSS Base: 4.0
CVSS Temporal: 3.8
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
A vulnerability in the System Snapshot of Cisco TelePresence Video
Communication Server (VCS) Expressway could allow an authenticated, remote
attacker to view sensitive data.
The vulnerability is due to insufficient protection of data at rest. An
attacker could exploit this vulnerability by downloading the snapshot file
and viewing the password hashes in it. An exploit could allow the attacker to
crack the password hashes and use the credentials to launch further attacks.
Cisco has confirmed the vulnerability; however, software updates are
At the time this alert was first published, Cisco VCS Expressway version
X8.5.1 was vulnerable. Later releases of Cisco VCS Expressway may also
To exploit this vulnerability, an attacker requires authenticated access
to the targeted system. Authenticated access may require the attacker
to access trusted, internal networks. These requirements could limit the
likelihood of a successful exploit.
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 CSCuv40422 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
crack the password hashes and use credentials to launch further attacks.
Additional technical information is unavailable.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to access local
Administrators are advised to allow only trusted users to have network
Administrators are advised to allow only privileged users to access
administration or management systems.
Administrators may consider using IP-based access control lists (ACLs)
to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
Software updates are not available.
The security vulnerability applies to the following combinations of products.
Cisco Cisco TelePresence Video Communication Server (VCS) Expressway
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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