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             AUSCERT External Security Bulletin Redistribution

  Cisco ATA 190 Series Analog Telephone Adapter Software Vulnerabilities
                              7 October 2021


        AusCERT Security Bulletin Summary

Product:           ATA 190 Series Analog Telephone Adapter
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-34735 CVE-2021-34710 

Original Bulletin: 

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

Cisco ATA 190 Series Analog Telephone Adapter Software Vulnerabilities

Priority:        High
Advisory ID:     cisco-sa-ata19x-multivuln-A4J57F3
First Published: 2021 October 6 16:00 GMT
Version 1.0:     Final
Workarounds:     No workarounds available
Cisco Bug IDs:   CSCvw22570 CSCvw25739 CSCvw25740 CSCvx48193
CVE Names:       CVE-2021-34710 CVE-2021-34735
CWEs:            CWE-770 CWE-94


  o Multiple vulnerabilities in the Cisco ATA 190 Series Analog Telephone
    Adapter Software could allow an attacker to perform a command injection
    attack resulting in remote code execution or cause a denial of service
    (DoS) condition on an affected device.

    For more information about these vulnerabilities, see the Details section
    of this advisory.

    Cisco has released software updates that address these vulnerabilities.
    There are no workarounds that address these vulnerabilities.

    This advisory is available at the following link:

Affected Products

  o Vulnerable Products

    These vulnerabilities affect the following Cisco products if they are
    running a vulnerable release of Cisco ATA 190 Series On-Premises Software
    or Cisco ATA 190 Series Multiplatform (MPP) Software:

       ATA 190 (On-premises only)
       ATA 191 (On-premises or Multiplatform)
       ATA 192 (Multiplatform only)

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

    Products Confirmed Not Vulnerable

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


  o The vulnerabilities are not dependent on one another. Exploitation of one
    of the vulnerabilities is not required to exploit the other vulnerability.
    In addition, a software release that is affected by one of the
    vulnerabilities may not be affected by the other vulnerability.

    Details about the vulnerabilities are as follows:

    CVE-2021-34710: Cisco ATA 190 Series Analog Telephone Adapter Software
    Command Injection Vulnerability

    A vulnerability in the web UI of Cisco ATA 190 Series Multiplatform
    Software could allow an authenticated, remote attacker to perform a command
    injection attack resulting in remote code execution.

    This vulnerability is due to insufficient input validation. An attacker
    could exploit this vulnerability by sending a crafted request to the web UI
    of an affected device. A successful exploit could allow the attacker to
    inject commands that will be executed on the underlying OS with root 

    Bug ID(s): CSCvx48193
    Security Impact Rating (SIR): High
    CVSS Base Score: 8.8
    CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

    CVE-2021-34735: Cisco ATA 190 Series Analog Telephone Adapter Software
    Denial of Service Vulnerability

    A vulnerability in ICMP packet processing of Cisco ATA 190 Series
    On-Premises Software and ATA 190 Series Multiplatform Software could allow
    an unauthenticated, remote attacker to cause the Ethernet IP interface to
    become unreachable, causing a denial of service (DoS) condition.

    This vulnerability is due to lack of proper rate limiting of ICMP packets
    on the Ethernet interface. An attacker could exploit this vulnerability by
    sending a crafted, steady stream of ICMP traffic to the IP address of the
    targeted device. A successful exploit could allow the attacker to cause the
    Ethernet port to go offline which leads to a DoS condition. The user could
    observe the PRT LED on the ATA device turning red, the ATA becoming
    unresponsive over the web management interface and the Ethernet port no
    longer having an IP address association. This will require a manual
    power-cycle to recover the device.

    Bug ID(s): CSCvw25739 , CSCvw22570 , CSCvw25740
    Security Impact Rating (SIR): High
    CVSS Base Score: 8.6
    CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H


  o There are no workarounds that address these vulnerabilities.

Fixed Software

  o Cisco has released free software updates that address the vulnerabilities
    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:

    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 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 firmware release
    as indicated in the following table:

    Cisco IP Phone Model  Cisco Bug   First Fixed Release
    ATA 190 Analog                    End-of-Sale and End-of-Life Announcement
    Telephone Adapter     CSCvw25739  for the Cisco ATA 190 Analog Telephone
    ATA 191 Analog        CSCvw25740  12.0(1)SR4
    Telephone Adapter
    ATA 191 Multiplatform CSCvx48193 
    Analog Telephone      ,           11.2.1
    Adapter               CSCvw22570
    ATA 192 Multiplatform CSCvx48193 
    Analog Telephone      ,           11.2.1
    Adapter               CSCvw22570

    The Cisco Product Security Incident Response Team (PSIRT) validates only
    the affected and fixed release information that is documented in this

Exploitation and Public Announcements

  o The Cisco 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 Takeshi Shiomitsu of IoT Inspector, Gmbh for
    reporting the vulnerability associated with CVE-2021-34710.

    The vulnerability associated with CVE-2021-34735 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.


  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ata19x-multivuln-A4J57F3

Revision History

  o +----------+---------------------------+----------+--------+--------------+
    | Version  |        Description        | Section  | Status |     Date     |
    | 1.0      | Initial public release.   | -        | Final  | 2021-OCT-06  |

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