ESB-2018.1821 - [Cisco] Cisco TelePresence Video Communication Server Expressway: Denial of service - Remote/unauthenticated 2018-06-21

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1821
         Cisco TelePresence Video Communication Server Expressway
                      Denial of Service Vulnerability
                               21 June 2018

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

Product:           Cisco TelePresence Video Communication Server Expressway
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0358  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-vcse-dos

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Cisco TelePresence Video Communication Server Expressway Denial of Service
Vulnerability

Medium

Advisory ID:     cisco-sa-20180620-vcse-dos
First Published: 2018 June 20 16:00 GMT
Version 1.0:     Final
Workarounds:     No workarounds available
Cisco Bug IDs:
 CSCvh77056
 CSCvh77058
 CSCvh95264
 
CVE-2018-0358
CWE-769
CVSS Score:
Base 5.3
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:X
CVE-2018-0358
 
Summary

  * A vulnerability in the file descriptor handling of Cisco TelePresence
    Video Communication Server (VCS) Expressway could allow an
    unauthenticated, remote attacker to cause a denial of service (DoS)
    condition.

    The vulnerability is due to exhaustion of file descriptors while
    processing a high volume of traffic. An attacker could exploit this
    vulnerability by establishing a high number of concurrent TCP connections
    to the vulnerable system. An exploit could allow the attacker to cause a
    restart in a specific process, resulting in a temporary interruption of
    service.

    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-20180620-vcse-dos

Affected Products

  * Vulnerable Products

    This vulnerability affects Cisco TelePresence Video Communication Server
    (VCS) Expressway. For information about affected software releases,
    consult the Cisco bug ID(s) at the top of this advisory.

    Products Confirmed Not Vulnerable

    Only products listed in the Vulnerable Products section of this advisory
    are known to be affected by this vulnerability.

Workarounds

  * There are no workarounds that address this vulnerability.

Fixed Software

  * 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

  * 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 internal security testing.

Cisco Security Vulnerability Policy

  * 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

  * Subscribe

URL

  * https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-vcse-dos

Revision History

  * +----------------------------------------------------------------------------+
    | Version  |        Description         | Section  | Status  |     Date      |
    |----------+----------------------------+----------+---------+---------------|
    | 1.0      | Initial public release.    | -        | Final   | 2018-June-20  |
    +----------------------------------------------------------------------------+

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