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AUSCERT External Security Bulletin Redistribution
ESB-2021.3310.2
Cisco ATA 190 Series Analog Telephone Adapter Software Vulnerabilities
25 October 2021
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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:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ata19x-multivuln-A4J57F3
Revision History: October 25 2021: Vendor added additional user privilege impact for cve-2021-34710
October 7 2021: Initial Release
- --------------------------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
Last Updated: 2021 October 22 15:03 GMT
Version 1.2: 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
Summary
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:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ata19x-multivuln-A4J57F3
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.
Details
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. It could also allow a
lower-privileged user to run commands as an administrative user.
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
privileges. A lower-privileged user could also potentially run commands
with the privileges of an administrative user within the web UI.
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
Workarounds
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:
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 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
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
ID
ATA 190 Analog End-of-Sale and End-of-Life Announcement
Telephone Adapter CSCvw25739 for the Cisco ATA 190 Analog Telephone
Adapter
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
advisory.
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.
Source
o Cisco would like to thank T. 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.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ata19x-multivuln-A4J57F3
Revision History
o +---------+------------------------------+---------+--------+-------------+
| Version | Description | Section | Status | Date |
+---------+------------------------------+---------+--------+-------------+
| | Added additional user | | | |
| 1.2 | privilege impact for | Details | Final | 2021-OCT-22 |
| | CVE-2021-34710. | | | |
+---------+------------------------------+---------+--------+-------------+
| 1.1 | Updated source reference. | Source | Final | 2021-OCT-07 |
+---------+------------------------------+---------+--------+-------------+
| 1.0 | Initial public release. | - | Final | 2021-OCT-06 |
+---------+------------------------------+---------+--------+-------------+
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