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             AUSCERT External Security Bulletin Redistribution

     Cisco Unified Communications Manager Path Traversal Vulnerability
                               16 April 2020


        AusCERT Security Bulletin Summary

Product:           Cisco Unified Communications Manager
                   Cisco Unified Communications Manager Session Management Edition
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-3177  

Original Bulletin: 

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

Cisco Unified Communications Manager Path Traversal Vulnerability

Priority:        High

Advisory ID:     cisco-sa-cucm-taps-path-trav-pfsFO93r

First Published: 2020 April 15 16:00 GMT

Version 1.0:     Final

Workarounds:     No workarounds available

Cisco Bug IDs:   CSCvq58268CSCvt33058



CVSS Score:


  o A vulnerability in the Tool for Auto-Registered Phones Support (TAPS) of
    Cisco Unified Communications Manager (UCM) and Cisco Unified Communications
    Manager Session Management Edition (SME) could allow an unauthenticated,
    remote attacker to conduct directory traversal attacks on an affected

    The vulnerability is due to insufficient validation of user-supplied input
    to the TAPS interface of the affected device. An attacker could exploit
    this vulnerability by sending a crafted request to the TAPS interface. A
    successful exploit could allow the attacker to read arbitrary files in the

    Cisco has released software updates that address the vulnerability
    described in this advisory. There are no workarounds that address this

    This advisory is available at the following link:

Affected Products

  o Vulnerable Products

    This vulnerability affects the following Cisco products if they are running
    a vulnerable software release and the auto-registration feature is enabled.
    The auto-registration feature is not enabled by default.

       UCM SME

    For information about which Cisco software releases are vulnerable, see the
    Fixed Software section of this advisory.

    Determine Whether Auto-Registration Is Enabled

    Administrators can use the following steps to determine whether
    auto-registration is enabled:

     1. In Cisco Unified Communications Manager Serviceability, choose Tools >
        Control Center - Feature Services. The Control Center-Feature Services 
        window displays.
     2. Choose the Cisco Unified Communications Manager server from the Servers
        drop-down list box. TAPS Service displays in the list in the Database
        and Admin Services column, in Unified CMServices.
     3. Note the status. If TAPS is already activated, Status is shown as

    Products Confirmed Not Vulnerable

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


  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/

    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

    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

    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

    Fixed Releases

    Customers are advised to upgrade to an appropriate fixed software release
    as indicated in the following table:

    Cisco UCM and SME Major Release First Fixed Release for This Vulnerability
    Prior to 10.5                   Migrate to 10.5(2)SU9
    10.5                            10.5(2)SU9
    11.0                            Migrate to 11.5(1)SU7
    11.5                            11.5(1)SU7
    12.0                            Migrate to 12.5(1)SU2
    12.5                            12.5(1)SU2

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.


  o Cisco would like to thank Brenden Meeder and Lawrence Lauderdale of Booz
    Allen Hamilton for reporting this vulnerability.

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.


  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/

Revision History

  o +----------+---------------------------+----------+--------+--------------+
    | Version  |        Description        | Section  | Status |     Date     |
    | 1.0      | Initial public release.   | -        | Final  | 2020-APR-15  |

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