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AUSCERT External Security Bulletin Redistribution
ESB-2020.1935
Multiple Cisco IOS Software for Cisco Industrial Routers vulnerabilities
4 June 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco IOS Software for Cisco Industrial Routers
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Remote/Unauthenticated
Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-3258 CVE-2020-3234 CVE-2020-3210
CVE-2020-3205 CVE-2020-3198
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-iot-rce-xYRSeMNH
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-iot-vds-cred-uPMp9zbY
Comment: This bulletin contains four (4) Cisco Systems security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco IOS Software for Cisco Industrial Routers Arbitrary Code Execution
Vulnerabilities
Priority: Critical
Advisory ID: cisco-sa-ios-iot-rce-xYRSeMNH
First Published: 2020 June 3 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvr12083 CSCvr46885
CVE-2020-3198
CVE-2020-3258
CWE-119
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 Multiple vulnerabilities in Cisco IOS Software for Cisco 809 and 829
Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000
Series Connected Grid Routers (CGR1000) could allow an unauthenticated,
remote attacker or an authenticated, local attacker to execute arbitrary
code on an affected system or cause an affected system to crash and reload.
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-ios-iot-rce-xYRSeMNH
This advisory is part of the June 3, 2020, release of the Cisco IOS and IOS
XE Software Security Advisory Bundled Publication, which includes 23 Cisco
Security Advisories that describe 25 vulnerabilities. For a complete list
of the advisories and links to them, see Cisco Event Response: June 2020
Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled
Publication .
Affected Products
o Vulnerable Products
These vulnerabilities affect the following Cisco products if they are
running a vulnerable release of Cisco IOS Software:
Cisco 809 and 829 Industrial ISRs
CGR1000
For information about which Cisco software releases are vulnerable, see the
Fixed Software section of this advisory.
Note: Cisco 800 Series Industrial ISRs and Cisco CGR1000 devices are
designed on a hypervisor architecture, where Cisco IOS Software, a Guest
Operating System (Guest OS), and a Virtual Device Server (VDS) run as
separate virtual machines (VMs). Cisco IOS Software and Guest OS need to
access some shared devices. Examples are embedded multimedia card (eMMC)
flash memory, USB ports, and the console. VDS coordinates access to the
shared devices and provides communication channels between VMs over
emulated Ethernet interfaces.
Cisco IOS Software and VDS perform inter-VM signaling and control
operations by establishing a UDP channel on UDP port 9700. Signaling
packets are not restricted-they are not processed only when they are sent
to internal, local communications between VMs. Instead, an affected system
will accept and process signaling packets from any interface of an affected
device. The impacts of successful exploitation are described in the Details
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.
Cisco has confirmed that these vulnerabilities do not affect the following
Cisco products:
800 Series ISRs
807 Industrial ISRs
IOS XE Software
IOS XR Software
NX-OS Software
Details
o Two vulnerabilities in Cisco IOS Software for Cisco 800 Series Industrial
ISRs and Cisco CGR1000 could allow an unauthenticated, remote attacker or
an authenticated local attacker to execute arbitrary code on an affected
system or cause an affected device to crash and reload.
These vulnerabilities reside either in the area of code that manages
inter-VM signaling or in one of the diagnostic test CLI commands of Cisco
IOS Software for the affected products.
The vulnerabilities are not dependent on one another; exploitation of one
of the vulnerabilities is not required to exploit the other vulnerability.
Vulnerability Details
Details about the vulnerabilities are as follows.
Cisco IOS Software for Cisco Industrial Routers Remote Code Execution
Vulnerability
A vulnerability in the area of code that manages inter-VM signaling of
Cisco IOS Software for Cisco 800 Series Industrial ISRs and Cisco CGR1000
devices could allow an unauthenticated, remote attacker to execute
arbitrary code on an affected system or cause an affected system to crash
and reload.
The vulnerability is due to incorrect bounds checking of certain values in
packets that are destined for UDP port 9700 of an affected device. An
attacker could exploit this vulnerability by sending malicious packets to
an affected device. When the packets are processed, an exploitable buffer
overflow condition may occur. A successful exploit could allow the attacker
to remotely execute code in the context of the Cisco IOS Software VM that
is running on an affected system or cause an affected device to reload.
This vulnerability can be exploited by using malicious UDP packets over
either IPv4 or IPv6. The malicious packets must be destined to and
processed by an affected device; traffic transiting a device will not
trigger the vulnerability.
Bug ID(s): CSCvr12083
CVE ID: CVE-2020-3198
Security Impact Rating (SIR): Critical
CVSS Base Score: 9.8
CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Mitigation for CVE-2020-3198
There are no workarounds that address this vulnerability.
Customers can reduce the attack surface by restricting inbound traffic
destined for UDP port 9700 of an affected device by implementing an access
control list (ACL) or infrastructure access control list (iACL). This may
be a suitable mitigation until affected devices can be upgraded.
Information about access lists is in Cisco Guide to Harden Cisco IOS
Devices. Information about iACLs is in Protecting Your Core: Infrastructure
Protection Access Control Lists .
Cisco IOS Software for Cisco Industrial Routers Test CLI Arbitrary Code
Execution Vulnerability
A vulnerability in one of the diagnostic test CLI commands of Cisco IOS
Software for Cisco 800 Series Industrial ISRs and Cisco CGR1000 devices
could allow an authenticated, local attacker to execute arbitrary code on
an affected device. The attacker must have valid user credentials at
privilege level 15.
The vulnerability exists because, under specific circumstances, the
affected software permits modification of the device's run-time memory. An
attacker could exploit this vulnerability by authenticating to the targeted
device and issuing a specific diagnostic test command at the CLI. A
successful exploit could trigger a logic error in the code that was
designed to restrict run-time memory modifications. The attacker could take
advantage of this logic error to overwrite system memory locations and
execute arbitrary code on an affected device.
Bug ID(s): CSCvr46885
CVE ID: CVE-2020-3258
Security Impact Rating (SIR): Medium
CVSS Base Score: 5.7
CVSS Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
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 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.
Cisco IOS Software
To help customers determine their exposure to vulnerabilities in Cisco IOS
Software, Cisco provides the Cisco Software Checker to identify any Cisco
Security Advisories that impact a specific Cisco IOS Software release and
the earliest release that fixes the vulnerabilities described in each
advisory ("First Fixed"). If applicable, the tool also returns the earliest
release that fixes all the vulnerabilities described in all the advisories
identified ("Combined First Fixed").
Customers can use the Cisco Software Checker to search advisories in the
following ways:
Choose the software and one or more releases
Upload a .txt file that includes a list of specific releases
Enter the output of the show version command
After initiating a search, customers can customize the search to include
all Cisco Security Advisories, a specific advisory, or all advisories in
the most recent bundled publication.
Customers can use the following form to determine whether a release is
affected by any Cisco Security Advisory by entering a Cisco IOS Software
release-for example, 15.1(4)M2 :
[ ] [Check]
By default, the Cisco Software Checker includes results only for
vulnerabilities that have a Critical or High Security Impact Rating (SIR).
To include results for Medium SIR vulnerabilities, customers can use the
Cisco Software Checker on Cisco.com and check the Medium check box in the
drop-down list under Impact Rating when customizing a search.
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 vulnerabilities that are
described in this advisory.
Source
o These vulnerabilities were found during internal security testing by X.B.
of the Cisco Advanced Security Initiatives Group (ASIG) and E.I. of Cisco
PSIRT.
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.
Related to This Advisory
o Cisco Event Response: June 2020 Semiannual Cisco IOS and IOS XE Software
Security Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-ios-iot-rce-xYRSeMNH
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2020-JUN-03 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------------------------------------------------------------
Cisco IOS Software for Cisco Industrial Routers Virtual Device Server CLI
Command Injection Vulnerability
Priority: High
Advisory ID: cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE
First Published: 2020 June 3 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvq87451 CSCvr18056
CVE-2020-3210
CWE-77
CVSS Score:
6.7 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
o
A vulnerability in the CLI parsers of Cisco IOS Software for Cisco 809 and
829 Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000
Series Connected Grid Routers (CGR1000) could allow an authenticated, local
attacker to execute arbitrary shell commands on the Virtual Device Server
(VDS) of an affected device. The attacker must have valid user credentials
at privilege level 15.
The vulnerability is due to insufficient validation of arguments that are
passed to specific VDS-related CLI commands. An attacker could exploit this
vulnerability by authenticating to the targeted device and including
malicious input as the argument of an affected command. A successful
exploit could allow the attacker to execute arbitrary commands in the
context of the Linux shell of VDS with the privileges of the root user.
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-ios-iot-vds-cmd-inj-VfJtqGhE
This advisory is part of the June 3, 2020, release of the Cisco IOS and IOS
XE Software Security Advisory Bundled Publication, which includes 23 Cisco
Security Advisories that describe 25 vulnerabilities. For a complete list
of the advisories and links to them, see Cisco Event Response: June 2020
Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled
Publication .
Affected Products
o Vulnerable Products
This vulnerability affects the following Cisco products if they are running
a vulnerable release of Cisco IOS Software:
Cisco 809 and 829 Industrial ISRs
CGR1000
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 this vulnerability.
Cisco has confirmed that this vulnerability does not affect the following
Cisco products:
800 Series ISRs
807 Industrial ISRs
IOS XE Software
IOS XR Software
NX-OS Software
Details
o Cisco 800 Series Industrial ISRs and Cisco CGR1000 devices are designed on
a hypervisor architecture, where Cisco IOS Software, a Guest Operating
System (Guest OS), and VDS run as separate virtual machines (VMs). Cisco
IOS Software and Guest OS need to access some shared devices. Examples are
embedded multimedia card eMMC flash memory, USB ports, and the console. VDS
coordinates access to the shared devices and provides communication
channels between VMs over emulated Ethernet interfaces.
Exploitation of this vulnerability could allow the attacker to gain full
control of VDS and therefore compromise the system completely, including
compromise of the Cisco IOS Software VM and the Guest OS VM.
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.
Cisco IOS Software
To help customers determine their exposure to vulnerabilities in Cisco IOS
Software, Cisco provides the Cisco Software Checker to identify any Cisco
Security Advisories that impact a specific Cisco IOS Software release and
the earliest release that fixes the vulnerabilities described in each
advisory ("First Fixed"). If applicable, the tool also returns the earliest
release that fixes all the vulnerabilities described in all the advisories
identified ("Combined First Fixed").
Customers can use the Cisco Software Checker to search advisories in the
following ways:
Choose the software and one or more releases
Upload a .txt file that includes a list of specific releases
Enter the output of the show version command
After initiating a search, customers can customize the search to include
all Cisco Security Advisories, a specific advisory, or all advisories in
the most recent bundled publication.
Customers can use the following form to determine whether a release is
affected by any Cisco Security Advisory by entering a Cisco IOS Software
release-for example, 15.1(4)M2 :
[ ] [Check]
By default, the Cisco Software Checker includes results only for
vulnerabilities that have a Critical or High Security Impact Rating (SIR).
To include results for Medium SIR vulnerabilities, customers can use the
Cisco Software Checker on Cisco.com and check the Medium check box in the
drop-down list under Impact Rating when customizing a search.
Fixed Releases for All VDS-Related Vulnerabilities in This Bundle of
Advisories
This release of the Cisco IOS and IOS XE Software Security Advisory Bundled
Publication contains multiple advisories for vulnerabilities that affect
VDS. To help ensure a complete upgrade solution for these vulnerabilities,
administrators are advised to upgrade affected devices to a fixed software
release that addresses all VDS-related advisories in this bundled
publication:
cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt
cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE
cisco-sa-ios-iot-vds-cred-uPMp9zbY
cisco-sa-ios-ir800-img-verif-wHhLYHjK
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 by X.B. of
the Cisco Advanced Security Initiatives Group (ASIG) and E.I. of Cisco
PSIRT.
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.
Related to This Advisory
o Cisco Event Response: June 2020 Semiannual Cisco IOS and IOS XE Software
Security Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2020-JUN-03 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------------------------------------------------------------
Cisco IOS Software for Cisco Industrial Routers Virtual Device Server Inter-VM
Channel Command Injection Vulnerability
Priority: Critical
Advisory ID: cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt
First Published: 2020 June 3 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvq66443
CVE-2020-3205
CWE-20
CVSS Score:
8.8 AV:A/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 implementation of the inter-VM channel of Cisco IOS
Software for Cisco 809 and 829 Industrial Integrated Services Routers
(Industrial ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000)
could allow an unauthenticated, adjacent attacker to execute arbitrary
shell commands on the Virtual Device Server (VDS) of an affected device.
The vulnerability is due to insufficient validation of signaling packets
that are destined to VDS. An attacker could exploit this vulnerability by
sending malicious packets to an affected device. A successful exploit could
allow the attacker to execute arbitrary commands in the context of the
Linux shell of VDS with the privileges of the root user. Because the device
is designed on a hypervisor architecture, exploitation of a vulnerability
that affects the inter-VM channel may lead to a complete system compromise.
For more information about this vulnerability, see the Details section of
this advisory.
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-ios-iot-udp-vds-inj-f2D5Jzrt
This advisory is part of the June 3, 2020, release of the Cisco IOS and IOS
XE Software Security Advisory Bundled Publication, which includes 23 Cisco
Security Advisories that describe 25 vulnerabilities. For a complete list
of the advisories and links to them, see Cisco Event Response: June 2020
Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled
Publication .
Affected Products
o Vulnerable Products
This vulnerability affects the following Cisco products if they are running
a vulnerable release of Cisco IOS Software:
Cisco 809 and 829 Industrial ISRs
CGR1000
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 this vulnerability.
Cisco has confirmed that this vulnerability does not affect the following
Cisco products:
800 Series ISRs
807 Industrial ISRs
IOS XE Software
IOS XR Software
NX-OS Software
Details
o Cisco 800 Series Industrial ISRs and Cisco CGR1000 devices are designed on
a hypervisor architecture, where Cisco IOS Software, a Guest Operating
System (Guest OS), and VDS run as separate virtual machines (VMs). Cisco
IOS Software and Guest OS need to access some shared devices. Examples are
embedded multimedia card (eMMC) flash memory, USB ports, and the console.
VDS coordinates access to the shared devices and provides communication
channels between VMs over emulated Ethernet interfaces.
Cisco IOS Software and VDS perform inter-VM signaling and control
operations over a UDP channel on UDP port 9700. The attacker could gain
full control of the VDS and compromise the system completely because
signaling packets are not restricted-they are not processed only when they
are sent to internal, local communications between VMs. Instead, an
affected system will accept and process signaling packets from any
interface of an affected device. Successful exploitation could allow the
attacker to gain full control of VDS, which could lead to a complete system
compromise, including compromise of the Cisco IOS Software VM and the Guest
OS VM.
Workarounds
o There are no workarounds that address this vulnerability.
Customers can reduce the attack surface by restricting inbound traffic
destined for UDP port 9700 of an affected device by implementing an access
control list (ACL) or infrastructure access control list (iACL). This may
be a suitable mitigation until affected devices can be upgraded.
Information about access lists is in Cisco Guide to Harden Cisco IOS
Devices. Information about iACLs is in Protecting Your Core: Infrastructure
Protection Access Control Lists .
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.
Cisco IOS Software
To help customers determine their exposure to vulnerabilities in Cisco IOS
Software, Cisco provides the Cisco Software Checker to identify any Cisco
Security Advisories that impact a specific Cisco IOS Software release and
the earliest release that fixes the vulnerabilities described in each
advisory ("First Fixed"). If applicable, the tool also returns the earliest
release that fixes all the vulnerabilities described in all the advisories
identified ("Combined First Fixed").
Customers can use the Cisco Software Checker to search advisories in the
following ways:
Choose the software and one or more releases
Upload a .txt file that includes a list of specific releases
Enter the output of the show version command
After initiating a search, customers can customize the search to include
all Cisco Security Advisories, a specific advisory, or all advisories in
the most recent bundled publication.
Customers can use the following form to determine whether a release is
affected by any Cisco Security Advisory by entering a Cisco IOS Software
release-for example, 15.1(4)M2 :
[ ] [Check]
By default, the Cisco Software Checker includes results only for
vulnerabilities that have a Critical or High Security Impact Rating (SIR).
To include results for Medium SIR vulnerabilities, customers can use the
Cisco Software Checker on Cisco.com and check the Medium check box in the
drop-down list under Impact Rating when customizing a search.
Fixed Releases for All VDS-Related Vulnerabilities in This Bundle of
Advisories
This release of the Cisco IOS and IOS XE Software Security Advisory Bundled
Publication contains multiple advisories for vulnerabilities that affect
VDS. To help ensure a complete upgrade solution for these vulnerabilities,
administrators are advised to upgrade affected devices to a fixed software
release that addresses all VDS-related advisories in this bundled
publication:
cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt
cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE
cisco-sa-ios-iot-vds-cred-uPMp9zbY
cisco-sa-ios-ir800-img-verif-wHhLYHjK
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 by X.B. of
the Cisco Advanced Security Initiatives Group (ASIG) and E.I. of Cisco
PSIRT.
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.
Related to This Advisory
o Cisco Event Response: June 2020 Semiannual Cisco IOS and IOS XE Software
Security Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2020-JUN-03 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------------------------------------------------------------
Cisco IOS Software for Cisco Industrial Routers Virtual Device Server Static
Credentials Vulnerability
Priority: High
Advisory ID: cisco-sa-ios-iot-vds-cred-uPMp9zbY
First Published: 2020 June 3 16:00 GMT
Version 1.0: Final
Workarounds: Yes
Cisco Bug IDs: CSCvo56332
CVE-2020-3234
CWE-798
CVSS Score:
8.8 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
o
A vulnerability in the virtual console authentication of Cisco IOS Software
for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial
ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000) could allow an
authenticated but low-privileged, local attacker to log in to the Virtual
Device Server (VDS) of an affected device by using a set of default
credentials.
The vulnerability is due to the presence of weak, hard-coded credentials.
An attacker could exploit this vulnerability by authenticating to the
targeted device and then connecting to VDS through the device's virtual
console by using the static credentials. A successful exploit could allow
the attacker to access the Linux shell of VDS as the root user.
Cisco has released software updates that address this vulnerability. There
is a workaround that addresses this vulnerability in Cisco IOS Software
releases 15.6(3)M and later.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-ios-iot-vds-cred-uPMp9zbY
This advisory is part of the June 3, 2020, release of the Cisco IOS and IOS
XE Software Security Advisory Bundled Publication, which includes 23 Cisco
Security Advisories that describe 25 vulnerabilities. For a complete list
of the advisories and links to them, see Cisco Event Response: June 2020
Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled
Publication .
Affected Products
o Vulnerable Products
This vulnerability affects the following Cisco products if they are running
a vulnerable release of Cisco IOS Software:
Cisco 809 and 829 Industrial ISRs
CGR1000
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 this vulnerability.
Cisco has confirmed that this vulnerability does not affect the following
Cisco products:
800 Series ISRs
807 Industrial ISRs
IOS XE Software
IOS XR Software
NX-OS Software
Details
o Cisco 800 Series Industrial ISRs and Cisco CGR1000 devices are designed on
a hypervisor architecture, where Cisco IOS Software, a Guest Operating
System (Guest OS), and VDS run as separate virtual machines (VMs). Cisco
IOS Software and Guest OS need to access some shared devices. Examples are
embedded multimedia card eMMC flash memory, USB ports, and the console. VDS
coordinates access to the shared devices and provides communication
channels between VMs over emulated Ethernet interfaces.
The vulnerability described in this advisory is localized in the context of
VDS; under no circumstances could an attacker use the static credentials to
log in to the Cisco IOS Software VM.
Workarounds
o There is a workaround that addresses this vulnerability in Cisco IOS
Software releases 15.6(3)M and later.
These releases introduced the global configuration command iox hypervisor
password < strong_password > to allow administrators to replace the default
password that is used to log in to VDS. An administrator can use this
command to define a strong password to replace the default password that
provides VDS access on an affected device, as shown in the following
example:
Router#configure terminal
router(config)#iox hypervisor password <strong_password>
Router(config)#end
Router#
This action may be a suitable workaround until switches that are affected
by this vulnerability can be upgraded.
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.
Cisco IOS Software
To help customers determine their exposure to vulnerabilities in Cisco IOS
Software, Cisco provides the Cisco Software Checker to identify any Cisco
Security Advisories that impact a specific Cisco IOS Software release and
the earliest release that fixes the vulnerabilities described in each
advisory ("First Fixed"). If applicable, the tool also returns the earliest
release that fixes all the vulnerabilities described in all the advisories
identified ("Combined First Fixed").
Customers can use the Cisco Software Checker to search advisories in the
following ways:
Choose the software and one or more releases
Upload a .txt file that includes a list of specific releases
Enter the output of the show version command
After initiating a search, customers can customize the search to include
all Cisco Security Advisories, a specific advisory, or all advisories in
the most recent bundled publication.
Customers can use the following form to determine whether a release is
affected by any Cisco Security Advisory by entering a Cisco IOS Software
release-for example, 15.1(4)M2 :
[ ] [Check]
By default, the Cisco Software Checker includes results only for
vulnerabilities that have a Critical or High Security Impact Rating (SIR).
To include results for Medium SIR vulnerabilities, customers can use the
Cisco Software Checker on Cisco.com and check the Medium check box in the
drop-down list under Impact Rating when customizing a search.
Fixed Releases for All VDS-Related Vulnerabilities in This Bundle of
Advisories
This release of the Cisco IOS and IOS XE Software Security Advisory Bundled
Publication contains multiple advisories for vulnerabilities that affect
VDS. To help ensure a complete upgrade solution for these vulnerabilities,
administrators are advised to upgrade affected devices to a fixed software
release that addresses all VDS-related advisories in this bundled
publication:
cisco-sa-ios-iot-udp-vds-inj-f2D5Jzrt
cisco-sa-ios-iot-vds-cmd-inj-VfJtqGhE
cisco-sa-ios-iot-vds-cred-uPMp9zbY
cisco-sa-ios-ir800-img-verif-wHhLYHjK
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 by X.B. of
the Cisco Advanced Security Initiatives Group (ASIG) and E.I. of Cisco
PSIRT.
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.
Related to This Advisory
o Cisco Event Response: June 2020 Semiannual Cisco IOS and IOS XE Software
Security Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-ios-iot-vds-cred-uPMp9zbY
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2020-JUN-03 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------END INCLUDED TEXT--------------------
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