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AUSCERT External Security Bulletin Redistribution
ESB-2018.1516
Cisco Meeting Server Media Services patched
17 May 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Meeting Server Media Services
Publisher: Cisco Systems
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-0280
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180516-msms
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Cisco Meeting Server Media Services Denial of Service Vulnerability
Severity: High
Advisory ID: cisco-sa-20180516-msms
First Published: 2018 May 16 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCve79693 CSCvf91393 CSCvg64656
CSCve79693 CSCvf91393 CSCvg64656 CSCvh30725 CSCvi86363
CVE-2018-0280
CVSS Score:
Base 7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:X/RL:X/RC:X
CVE-2018-0280
Summary
* A vulnerability in the Real-Time Transport Protocol (RTP) bitstream
processing of the Cisco Meeting Server could allow an unauthenticated,
remote attacker to cause a denial of service (DoS) condition.
The vulnerability is due to insufficient input validation of incoming RTP
bitstreams. An attacker could exploit this vulnerability by sending a
crafted RTP bitstream to an affected Cisco Meeting Server. A successful
exploit could allow the attacker to deny audio and video services by
causing media process crashes resulting in a DoS condition on the affected
product.
Cisco has released software updates that address this vulnerability. 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-20180516-msms
Affected Products
* Vulnerable Products
This vulnerability affects Cisco Meeting Server deployments that are
running Cisco Meeting Server Software Releases 2.0, 2.1, 2.2, and 2.3.
Administrators can determine which Cisco Meeting Server Software release is
running on a device by using the version command in the CLI. The following
example shows the output of the command for a device that is running
Cisco Meeting Server Software Release 2.2.11:
system> version
2_2_11
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Details
* Cisco Meeting Server incorporates video, audio, and content-sharing
capabilities into software that can be accessed via a conference room,
desktop, or mobile device. Cisco Meeting Server works across Cisco video
rooms and connects with Skype for Business and other hardware providers to
allow a seamless meeting architecture. This capability exists via
collaboration between Cisco and Acano, which was acquired by Cisco in 2016.
Workarounds
* There are no workarounds that address this vulnerability.
Fixed Software
* Cisco has released free software updates that address the vulnerability
described in this advisory. Customers may only install and expect support
for software versions and feature sets for which they have purchased a
license. By installing, downloading, accessing, or otherwise using such
software upgrades, customers agree to follow the terms of the Cisco
software license:
https://www.cisco.com/c/en/us/products/end-user-license-agreement.html
Additionally, customers may only download software for which they have a
valid license, procured from Cisco directly, or through a Cisco authorized
reseller or partner. In most cases this will be a maintenance upgrade to
software that was previously purchased. Free security software updates do
not entitle customers to a new software license, additional software
feature sets, or major revision upgrades.
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.
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 TAC:
https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html
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.
Fixed Releases
The following Cisco Meeting Server Software releases address this
vulnerability:
+------------------------------------------------------------+
| Cisco Meeting | First Fixed Release for This |
| Server | Vulnerability |
|-------------------+----------------------------------------|
| 2.0 | Affected; migrate to 2.2.10 |
|-------------------+----------------------------------------|
| 2.1 | 2.1.12 (see note) |
|-------------------+----------------------------------------|
| 2.2 | 2.2.10 |
|-------------------+----------------------------------------|
| 2.3 | 2.3.1 |
+------------------------------------------------------------+
Note: Cisco Meeting Server Software Release 2.1 has reached the end of
support and can be used only for upgrade chain purposes. For more
information, refer to the ?End Of Software Maintenance? section in
Cisco Meeting Server Release 2.3.0 Release Notes.
For information about the Cisco Meeting Server Software release model,
refer to Cisco Meeting Server: End of maintenance and support policy.
Exploitation and Public Announcements
* 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
* This vulnerability was found during resolution of a Cisco TAC support case.
URL
* https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180516-msms
Revision History
*
+-----------------------------------------------------------------------------+
| Version | Description | Section | Status | Date |
|----------+-----------------------------+----------+---------+---------------|
| 1.0 | Initial public release. | - | Final | 2018-May-16 |
+-----------------------------------------------------------------------------+
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