ESB-2019.0099 - [Cisco] Cisco Firepower Management Center: Denial of service - Remote/unauthenticated - 2019-01-11


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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0099
       Cisco Firepower Management Center Disk Utilization Denial of
                           Service Vulnerability
                              11 January 2019

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

Product:           Cisco Firepower Management Center
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-15458  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-fpwr-mc-dos

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Cisco Firepower Management Center Disk Utilization Denial of Service
Vulnerability

Priority:           Medium
Advisory ID:        cisco-sa-20190109-fpwr-mc-dos
First Published:    2019 January 9 16:00 GMT
Version 1.0:        Final
Workarounds:        No workarounds available
Cisco Bug IDs:      CSCvk20751
CVE-2018-15458
CWE-399
 
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-2018-15458
CWE-399
 
Summary

  o A vulnerability in the Shell Access Filter feature of Cisco Firepower
    Management Center (FMC), when used in conjunction with remote
    authentication, could allow an unauthenticated, remote attacker to cause
    high disk utilization, resulting in a denial of service (DoS) condition.

    The vulnerability occurs because the configuration of the Shell Access
    Filter, when used with a specific type of remote authentication, can cause
    a system file to have unbounded writes. An attacker could exploit this
    vulnerability by sending a steady stream of remote authentication requests
    to the appliance when the specific configuration is applied. Successful
    exploitation could allow the attacker to increase the size of a system log
    file so that it consumes most of the disk space. The lack of available disk
    space could lead to a DoS condition in which the device functions could
    operate abnormally, making the device unstable.

    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-20190109-fpwr-mc-dos

Affected Products

  o Vulnerable Products

    This vulnerability affects Cisco Firepower Management Center (FMC). 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

  o There are no workarounds that address this vulnerability.

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 found during internal security testing.

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.

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-fpwr-mc-dos

Revision History

    +----------+---------------------------+----------+--------+------------------+
    | Version  |        Description        | Section  | Status |       Date       |
    +----------+---------------------------+----------+--------+------------------+
    | 1.0      | Initial public release.   | --        | Final  | 2019-January-09  |
    +----------+---------------------------+----------+--------+------------------+

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.

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