ESB-2018.1516 - [Appliance] Cisco Meeting Server Media Services: Denial of service - Remote/unauthenticated 2018-05-17

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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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