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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.2315
   Cisco Data Center Network Manager Authentication Bypass Vulnerability
                               27 June 2019

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

Product:           Cisco Data Center Network Manager
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-1619  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190626-dcnm-bypass

- --------------------------BEGIN INCLUDED TEXT--------------------

Cisco Data Center Network Manager Authentication Bypass Vulnerability

Priority:        Critical

Advisory ID:     cisco-sa-20190626-dcnm-bypass

First Published: 2019 June 26 16:00 GMT

Version 1.0:     Final

Workarounds:     No workarounds availableCisco Bug IDs:   CSCvo64641

CVE-2019-1619    

CWE-284

CVSS Score:
9.8  AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X

Summary

  o A vulnerability in the web-based management interface of Cisco Data Center
    Network Manager (DCNM) could allow an unauthenticated, remote attacker to
    bypass authentication and execute arbitrary actions with administrative
    privileges on an affected device.

    The vulnerability is due to improper session management on affected DCNM
    software. An attacker could exploit this vulnerability by sending a crafted
    HTTP request to the affected device. A successful exploit could allow the
    attacker to gain administrative access on the affected device.

    Cisco has released software updates that 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-20190626-dcnm-bypass

Affected Products

  o Vulnerable Products

    The vulnerability affects Cisco Data Center Network Manager (DCNM) software
    releases prior to Release 11.1(1).

    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 An attacker may obtain a valid session cookie without knowing the
    administrative user password by sending a specially crafted HTTP request to
    a specific web servlet that is available on affected devices.

    Cisco deprecated the use of the affected web servlet in DCNM Software
    Release 11.0(1). There is no known attack vector on that version.

    Cisco removed the affected web servlet completely in DCNM Software Release
    11.1(1).

Workarounds

  o There are no workarounds that address this vulnerability.

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

    Cisco fixed this vulnerability in Cisco DCNM Software Release 11.1(1) and
    later.

    Customers can download Cisco Data Center Network Manager Software from the
    Software Center on Cisco.com by doing the following:

     1. Click Browse All .
     2. Choose Cloud and Systems Management > Data Center Infrastructure
        Management > Data Center Network Manager .
     3. Access releases by using the left pane of the Data Center Network
        Manager page.

Exploitation and Public Announcements

  o The Cisco Product Security Incident Response Team (PSIRT) is not aware of
    any malicious use of the vulnerability that is described in this advisory.

Source

  o Cisco would like to thank the independent security researcher Pedro Ribeiro
    for reporting this vulnerability to the iDefense Vulnerability Contributor
    Program.

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-20190626-dcnm-bypass

Revision History

  o +---------+---------------------------+---------+--------+---------------+
    | Version |        Description        | Section | Status |     Date      |
    +---------+---------------------------+---------+--------+---------------+
    | 1.0     | Initial public release.   | -       | Final  | 2019-June-26  |
    +---------+---------------------------+---------+--------+---------------+

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