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AUSCERT External Security Bulletin Redistribution
ESB-2018.1361
Cisco WebEx Recording Format Player Information Disclosure Vulnerability
4 May 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco WebEx Recording Format Player
Publisher: Cisco Systems
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-0288
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-webex-id
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Cisco WebEx Recording Format Player Information Disclosure Vulnerability
Medium
Advisory ID:
cisco-sa-20180502-webex-id
First Published:
2018 May 2 16:00 GMT
Version 1.0:
Final
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCvh89107
CSCvh89113
CSCvh89132
CSCvh89107,CSCvh89113,CSCvh89132,CSCvh89142
CVE-2018-0288
CWE-200
CVSS Score:
Base 5.3
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:X/RC:X
CVE-2018-0288
Summary
o A vulnerability in Cisco WebEx Recording Format (WRF) Player could allow an
unauthenticated, remote attacker to access sensitive data about the
application. An attacker could exploit this vulnerability to gain
information to conduct additional reconnaissance attacks.
The vulnerability is due to a design flaw in Cisco WRF Player. An attacker
could exploit this vulnerability by utilizing a maliciously crafted file
that could bypass checks in the code and enable an attacker to read memory
from outside the bounds of the mapped file.
There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180502-webex-id
Affected Products
o Vulnerable Products
This vulnerability affects Cisco WebEx Business Suite meeting sites, Cisco
WebEx Meetings sites, and Cisco WebEx WRF players. For information about
affected software releases, consult the Cisco bug ID(s) at the top of this
advisory.
To determine whether a Cisco WebEx Meetings site is running an affected
version of the WebEx client build, users can log in to their Cisco WebEx
Meetings site and go to Support > Downloads. The version of the WebEx
client build will be displayed on the right side of the page under About
Meeting Center.
Alternatively, version information for the Cisco WebEx Meetings client can
be accessed within the Cisco WebEx Meetings client. Version information for
the Cisco WebEx Meetings client on Windows and Linux platforms can be
viewed by choosing Help > About Cisco WebEx Meeting Center. Version
information for the Cisco WebEx Meetings client on Mac platforms can be
viewed by choosing Meeting Center > About Cisco WebEx Meeting Center.
The Cisco WebEx software updates are cumulative in client builds. For
example, if client build 30.32.16 is fixed, build 30.32.17 will contain
updated software. Cisco WebEx site administrators have access to secondary
version nomenclature, for example, T30 SP32 EP 16, which shows that the
server is running client build 30.32.16.
Note: Customers who do not receive automatic software updates may be
running versions of Cisco WebEx that have reached end of software
maintenance and should contact customer support.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Details
o The Cisco WebEx Business Suite (WBS) meeting services are a hosted
multimedia conferencing solution that is managed and maintained by Cisco
WebEx.
The WRF file format is used to store WebEx meeting recordings that have
been recorded on a WebEx meeting site.
The Cisco WebEx WRF Player is an application that is used to play back and
edit WebEx WRF recording files (files with .wrf extensions).
The Cisco WebEx WRF Player can be installed automatically when the user
accesses a recording file that is hosted on a Cisco WebEx Meetings site
(for stream playback mode). The Cisco WebEx WRF Player can also be
installed manually after downloading the application from http://
www.webex.com/play-webex-recording.html for offline playback of recording
files.
The Cisco WebEx WRF Player is available for all Cisco WebEx Business Suite
clients (WBS31 and WBS32) and Cisco WebEx Meetings clients.
The vulnerability described in this advisory could allow an attacker to
bypass checks in the code and enable the attacker to read memory from
outside the bounds of the mapped file.
To exploit this vulnerability, the player application would need to open a
malicious WRF file. The vulnerability cannot be triggered by users who are
attending a WebEx meeting.
Workarounds
o There are no workarounds that address this vulnerability. However, it is
possible to remove all Cisco WebEx software completely from a system by
using the Meeting Services Removal Tool (for Microsoft Windows) or Mac
WebEx Meeting Application Uninstaller (for Apple Mac OS X), both of which
are available for download from the Cisco Collaboration Help for Cisco
Spark, WebEx, and Jabber article at https://collaborationhelp.cisco.com/
article/en-us/WBX000026396.
Removal of the Cisco WebEx software from a Linux or UNIX-based system can
be accomplished by following the steps in the Cisco Collaboration Help for
Cisco Spark, WebEx, and Jabber article at https://
collaborationhelp.cisco.com/article/en-us/WBX28548.
Fixed Software
o For information about fixed software releases, consult the Cisco bug ID(s)
at the top of this advisory.
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.
Exploitation and Public Announcements
o 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
o This vulnerability was reported to Cisco by an anonymous reporter.
Cisco Security Vulnerability Policy
o To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy. This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
Subscribe to Cisco Security Notifications
o Subscribe
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-webex-id
Revision History
o
+----------+-----------------------------+----------+---------+---------------+
| Version | Description | Section | Status | Date |
+----------+-----------------------------+----------+---------+---------------+
| 1.0 | Initial public release. | -- | Final | 2018-May-02 |
+----------+-----------------------------+----------+---------+---------------+
Legal Disclaimer
o 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 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.
Cisco Security Vulnerability Policy
o To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy. This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
- --------------------------END INCLUDED TEXT--------------------
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