ESB-2019.0092 - [Cisco] Cisco ASR 900 Series: Denial of service - Remote/unauthenticated - 2019-01-10


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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0092
         Cisco ASR 900 Series Aggregation Services Router Software
                      Denial of Service Vulnerability
                              10 January 2019

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

Product:           Cisco ASR 900 Series
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-15464  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-asr900-dos

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Cisco ASR 900 Series Aggregation Services Router Software Denial of Service
Vulnerability

Importance:       Medium
Advisory ID:      cisco-sa-20190109-asr900-dos
First Published:  2019 January 9 16:00 GMT
Version 1.0:      Final
Workarounds:      No workarounds available
Cisco Bug IDs:    CSCvh94635
 
CVE-2018-15464
CWE-400
 
CVSS Score:       Base 5.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:X/RL:X/RC:X

Summary

  o A vulnerability in Cisco 900 Series Aggregation Services Router (ASR)
    software could allow an unauthenticated, remote attacker to cause a partial
    denial of service (DoS) condition on an affected device.

    The vulnerability is due to insufficient handling of certain broadcast
    packets ingress to the device. An attacker could exploit this vulnerability
    by sending large streams of broadcast packets to an affected device. If
    successful, an exploit could allow an attacker to impact services running
    on the device, resulting in a partial DoS condition.

    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-asr900-dos

Affected Products

  o Vulnerable Products

    This vulnerability affects Cisco ASR 900 Series software. 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 the resolution of a Cisco TAC support
    case.

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-asr900-dos

Revision History

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

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