ESB-2018.1371 - [Cisco] Cisco IOS XR: Denial of service - Remote/unauthenticated 2018-05-04

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1371
       Cisco IOS XR Software netconf Denial of Service Vulnerability
                                4 May 2018

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

Product:           Cisco IOS XR
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0286  

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

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Cisco IOS XR Software netconf Denial of Service Vulnerability

Medium
Advisory ID:
cisco-sa-20180502-iosxr
First Published:
2018 May 2 16:00 GMT
Version 1.0:
Final
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCvg95792
 
CVE-2018-0286
 
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-2018-0286
 
CWE-399
 
Summary

  o A vulnerability in the netconf interface of Cisco IOS XR Software could
    allow an unauthenticated, remote attacker to cause a denial of service
    (DoS) condition on affected system.

    The vulnerability is due to improper handling of malformed requests
    processed by the netconf process. An attacker could exploit this
    vulnerability by sending malicious requests to the affected software. An
    exploit could allow the attacker to cause the targeted process to restart,
    resulting in a DoS condition on the affected 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-iosxr

Affected Products

  o Vulnerable Products

    This vulnerability affects Cisco IOS XR 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.

    No other Cisco products are currently 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.

Subscribe to Cisco Security Notifications

  o Subscribe

URL

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

Revision History

  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.

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