ESB-2018.1360 - ALERT [Win][UNIX/Linux] Cisco WebEx Advanced Recording Format Player: Execute arbitrary code/commands - Remote with user interaction 2018-05-04

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1360
  Multiple remote code execution vulnerabilities have been identified in
               Cisco WebEx Advanced Recording Format Player
                                4 May 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco WebEx Advanced Recording Format Player
Publisher:         Cisco Systems
Operating System:  UNIX variants (UNIX, Linux, OSX)
                   Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0287 CVE-2018-0264 

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-webex-rce
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-war

Comment: This bulletin contains two (2) Cisco Systems security advisories.

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Cisco WebEx Advanced Recording Format Player Remote Code Execution
Vulnerability

Medium
Advisory ID:
cisco-sa-20180502-webex-rce
First Published:
2018 May 2 16:00 GMT
Version 1.0:
Final
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCvh70213
CSCvh70222
CSCvh70228
 
CVE-2018-0287
 
CWE-20
 
CVSS Score:
Base 6.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:X/RL:X/RC:X
CVE-2018-0287
 
CWE-20

Summary

  o A vulnerability in the Cisco WebEx Network Recording Player for Advanced
    Recording Format (ARF) files could allow an unauthenticated, remote
    attacker to execute arbitrary code on an affected system.

    The vulnerability is due to a design flaw in the affected software. An
    attacker could exploit this vulnerability by sending a user an email
    attachment or link to a malicious ARF file and persuading the user to open
    the file or follow the link. A successful exploit could allow the attacker
    to execute arbitrary code on the user's system.

    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-rce

Affected Products

  o Vulnerable Products

    This vulnerability affects Cisco WebEx Business Suite meeting sites, Cisco
    WebEx Meetings sites, Cisco WebEx Meetings Server, and Cisco WebEx ARF
    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 a WebEx client build, users can log in to the 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 a Cisco WebEx Meetings client can be
    accessed directly 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
    .

    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 Cisco WebEx Business Suite (WBS) meeting services are a hosted multimedia
    conferencing solution that is managed and maintained by Cisco WebEx. The
    Cisco WebEx Meetings Server is a multimedia conferencing solution that
    customers can host in their private clouds.

    The ARF file format is used to store WebEx meeting recordings that have
    been recorded on a WebEx meeting site.

    The Cisco WebEx ARF Player is an application that is used to play back and
    edit WebEx ARF recording files (files with an .arf filename extension).

    The Cisco WebEx ARF Player can be installed automatically when a user
    accesses a recording file that is hosted on a Cisco WebEx Meetings site
    (for stream playback mode). The Cisco WebEx ARF 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 ARF Player is available for all Cisco WebEx Business Suite
    clients (WBS31 and WBS32), Cisco WebEx Meetings clients, and Cisco WebEx
    Meetings Server clients.

    The vulnerability described in this advisory could allow an attacker to
    cause a player application to crash or, in some cases, remotely execute
    arbitrary code on an affected system.

    To exploit this vulnerability, the attacker would need to persuade a user
    to open a malicious ARF file by using the player application on an affected
    system. The attacker may be able to accomplish an exploit by providing the
    malicious ARF file directly to users, as an email attachment for example,
    or by directing a user to a malicious web page. This 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 the Mac
    WebEx Meeting Application Uninstaller (for Apple Mac OS X), both of which
    are available for download from the Cisco Collaboration Help article at 
    https://collaborationhelp.cisco.com/article/en-us/WBX000026396.

    Removal of Cisco WebEx software from a Linux or UNIX-based system can be
    accomplished by following the steps in the Cisco Collaboration Help 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 Cisco would like to thank Kushal Arvind Shah of Fortinet's FortiGuard Labs
    for reporting this vulnerability.

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-rce

Revision History

    +----------+-----------------------------+----------+---------+---------------+
    | 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.

Subscribe to Cisco Security Notifications

  o Subscribe

- -------------------------------------------------------------------------------

Cisco WebEx Advanced Recording Format Remote Code Execution Vulnerability

Critical
Advisory ID:
cisco-sa-20180502-war
First Published:
2018 May 2 16:00 GMT
Version 1.0:
Final
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCvh85410
CSCvh85430
CSCvh85440
CVE-2018-0264
 
CWE-20
 
CVSS Score:
Base 9.6
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:X/RL:X/RC:X
CVE-2018-0264
 
CWE-20
 
Summary

  o A vulnerability in the Cisco WebEx Network Recording Player for Advanced
    Recording Format (ARF) files could allow an unauthenticated, remote
    attacker to execute arbitrary code on the system of a targeted user.

    An attacker could exploit this vulnerability by sending the user a link or
    email attachment with a malicious ARF file and persuading the user to
    follow the link or open the file. Successful exploitation could allow the
    attacker to execute arbitrary code on the user's system.

    The Cisco WebEx players are applications that are used to play back WebEx
    meeting recordings that have been recorded by an online meeting attendee.
    The player can be installed automatically when a user accesses a recording
    file that is hosted on a WebEx server.

    Cisco has updated affected versions of Cisco WebEx Business Suite meeting
    sites, Cisco WebEx Meetings sites, Cisco WebEx Meetings Server, and the
    Cisco WebEx ARF Player to 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-20180502-war

Affected Products

  o Vulnerable Products

    This vulnerability affects Cisco WebEx Business Suite meeting sites, Cisco
    WebEx Meetings sites, Cisco WebEx Meetings Server, and Cisco WebEx ARF
    players. The following client builds of Cisco WebEx Business Suite (WBS31
    and WBS32), Cisco WebEx Meetings, and Cisco WebEx Meetings Server are
    affected by the vulnerability described in this advisory:
      - Cisco WebEx Business Suite (WBS31) client builds prior to T31.23.4
      - Cisco WebEx Business Suite (WBS32) client builds prior to T32.12
      - Cisco WebEx Meetings with client builds prior to T32.12
      - Cisco WebEx Meeting Server builds prior to 3.0 Patch 1
    To determine whether a Cisco WebEx meeting site is running an affected
    version of the WebEx client build, users can log in to their Cisco WebEx
    meeting 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. See the Fixed Software section of this advisory for details.

    Alternatively, version information for the Cisco WebEx meeting client can
    be accessed directly within the Cisco WebEx meeting client. Version
    information for the Cisco WebEx meeting client on Windows and Linux
    platforms can be viewed by choosing Help > About Cisco WebEx Meeting Center
    . Version information for the Cisco WebEx meeting client on Mac platforms
    can be viewed by choosing Meeting Center > About Cisco WebEx Meeting Center
    .

    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 Cisco WebEx Business Suite (WBS) meeting services and Cisco WebEx Meetings
    are a hosted multimedia conferencing solution that is managed and
    maintained by Cisco WebEx. The Cisco WebEx Meetings Server is a multimedia
    conferencing solution that customers can host in their private clouds.

    The ARF file format is used to store WebEx meeting recordings that have
    been recorded on a WebEx meeting site or on the computer of an online
    meeting attendee. The Cisco WebEx ARF Player is an application that is used
    to play back and edit WebEx ARF recording files (files with an .arf
    filename extension).

    The Cisco WebEx ARF Player can be installed automatically when a user
    accesses a recording file that is hosted on a Cisco WebEx Meetings site
    (for streaming playback mode). The Cisco WebEx ARF Player can also be
    installed manually after downloading the application from https://
    www.webex.com/play-webex-recording.html for offline playback of recording
    files.

    The Cisco WebEx ARF Player is available for all Cisco WebEx meeting site
    clients (WBS31, WBS32, and WebEx Meetings) and for Cisco WebEx Meetings
    Server clients.

Workarounds

  o There are no workarounds that address this vulnerability. However, it is
    possible to remove all WebEx software completely from a system by using the
    Meeting Services Removal Tool (for Microsoft Windows users) or the Mac
    WebEx Meeting Application Uninstaller (for Apple Mac OS X users), both of
    which are available for download from the Cisco Collaboration Help article
    at https://collaborationhelp.cisco.com/article/en-us/WBX000026396.

    Removal of Cisco WebEx software from a Linux or UNIX-based system can be
    accomplished by following the steps in the Cisco Collaboration Help article
    at https://collaborationhelp.cisco.com/article/en-us/WBX28548.

    Complete removal of the Cisco WebEx software will no longer allow WebEx
    functionality unless the software is reinstalled prior to attending a
    meeting or watching a recording.

Fixed Software

  o 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 client builds of Cisco WebEx Business Suite (WBS31 and
    WBS32), Cisco WebEx Meetings, and Cisco WebEx Meetings Server address the
    vulnerability described in this advisory:

      - Cisco WebEx Business Suite (WBS31) client builds T31.23.4 and later
      - Cisco WebEx Business Suite (WBS32) client builds T32.12 and later
      - Cisco WebEx Meetings with client builds T32.12 and later
      - Cisco WebEx Meeting Server builds 3.0 Patch 1 and later
    To determine whether a Cisco WebEx meeting site is running an affected
    version of a WebEx client build, users can log in to their Cisco WebEx
    meeting 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. 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.

    The vulnerability disclosed in this advisory affects the Cisco WebEx ARF
    Player. The Microsoft Windows, Apple Mac OS X, and Linux versions of the
    player are all affected by the vulnerability described in this advisory. If
    the Cisco WebEx ARF Player was automatically installed, it will be
    automatically upgraded to the latest, non-vulnerable version when users
    access a recording file that is hosted on a WebEx meeting site. If the
    Cisco WebEx ARF Player was manually installed, users will need to manually
    install a new version of the player after downloading the latest version
    from https://www.webex.com/play-webex-recording.html.

    Users can manually verify the installed version of the Cisco WebEx ARF
    Player to determine whether they are affected by this vulnerability.

    Note: Users whose WebEx Business Suites are on lockdown will need to
    contact WebEx Support to apply the appropriate patch to their WebEx site.

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 Cisco would like to thank Kushal Arvind Shah of Fortinet's FortiGuard Labs
    for reporting this vulnerability.

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

Action Links for This Advisory

  o Snort Rule 46496
    Snort Rule 46497
    Snort Rule 46498
    Snort Rule 46499

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
    cisco-sa-20180502-war

Revision History
l
  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.

Subscribe to Cisco Security Notifications

  o Subscribe

- --------------------------END INCLUDED TEXT--------------------

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