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AUSCERT External Security Bulletin Redistribution
ESB-2021.1042
Cisco IOx Application multiple vulnerabilities
25 March 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco IOx Application
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Modify Arbitrary Files -- Existing Account
Denial of Service -- Remote/Unauthenticated
Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1460 CVE-2021-1385
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-pt-hWGcPf7g
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-dos-4Fgcjh6
Comment: This bulletin contains two (2) Cisco Systems security advisories.
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Cisco IOx Application Environment Path Traversal Vulnerability
Priority: Medium
Advisory ID: cisco-sa-iox-pt-hWGcPf7g
First Published: 2021 March 24 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvw64810 CSCvx21776 CSCvx21783
CVE Names: CVE-2021-1385
CWEs: CWE-22
Summary
o A vulnerability in the Cisco IOx application hosting environment of
multiple Cisco platforms could allow an authenticated, remote attacker to
conduct directory traversal attacks and read and write files on the
underlying operating system or host system.
This vulnerability occurs because the device does not properly validate
URIs in IOx API requests. An attacker could exploit this vulnerability by
sending a crafted API request that contains directory traversal character
sequences to an affected device. A successful exploit could allow the
attacker to read or write arbitrary files on the underlying operating
system.
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-iox-pt-hWGcPf7g
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected the following Cisco
products if they were running a vulnerable software release and configured
with the Cisco IOx application hosting environment.
Cisco Product Cisco Software Vulnerable Releases
809 Industrial Integrated 15.8(3)M2 and later,
Services Routers (ISRs) IOS Software earlier than the first
fixed release
15.8(3)M2 and later,
829 Industrial ISRs IOS Software earlier than the first
fixed release
CGR 1000 IOx 1.9 and later, earlier than
CGR 1000 Compute Module Compute Platform the first fixed release
Firmware
IC3000 Industrial Compute Industrial Compute All releases earlier than
Gateway Gateway Software the first fixed release
Devices running Cisco IOS XE 16.3.1 and later, earlier
Software IOS XE Software than the first fixed
release
For additional information about which Cisco software releases are
vulnerable, see the Fixed Software section of this advisory.
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
Assess the Cisco IOx Application Hosting Environment
Use the following subsections to determine whether a device is configured
with the Cisco IOx application hosting environment.
Cisco 809 and 829 Industrial Integrated Services Routers
To determine whether the Cisco IOx application hosting environment is
enabled on a device, use the show iox host list detail | include OS status
command at the device CLI.
The following example shows the output of the command for a device that has
the Cisco IOx application hosting environment enabled:
Router#show iox host list detail | include OS status
OS status: RUNNING
If this command does not exist, or if it produces output that does not show
RUNNING in the OS status field, the device is not affected by this
vulnerability.
Cisco CGR 1000 Compute Module
To determine the status of IOx functionality, use the show iox host list
detail | include IOX Server is running CLI command, as shown in the
following example:
CGR1000#show iox host list detail | include IOX Server is running
IOX Server is running. Process ID: 305
CGR1000#
Cisco IC3000 Industrial Compute Gateway
On the Cisco IC3000 Industrial Compute Gateway, Cisco IOx functionality is
enabled by default.
To determine the status of IOx functionality, use the show iox summary CLI
command, as shown in the following example:
ic3k#show iox summary
IOx Infrastructure Summary:
---------------------------
eid: IC3000-2C2F-K9+FOC2227Y304
pfm: IC3000-2C2F-K9
s/n: FOC2227Y304
images: Lnx: 1.0.1., IOx: 1.7.0:r/1.7.0.0:fc6e9cf
boot: 2018-09-17 17:37:55
time: 2018-09-18 18:07:28
load: 18:07:28 up 1 day, 29 min, 0 users, load average: 0.32, 0.11, 0.02
memory: ok, used: 481/7854 (6%)
disk: ok, used: /:270305/338869 (79%), /software:57272/87462892 (0%)
process: warning, running: 4/5, failed: sshd
networking: ok
logs: ok, errors: caf (0)
apps: ok,
Cisco Platforms That Use Cisco IOS XE Software
The IOx application hosting infrastructure is not enabled by default.
There are two methods for assessing the Cisco IOx application hosting
environment in Cisco IOS XE Software:
Option 1: Use the show iox-service Command
To determine the status of Cisco IOx functionality, use the show
iox-service command in privileged EXEC mode, as shown in the following
example:
Router#show iox-service
IOx Infrastructure Summary:
---------------------------
IOx service (CAF) : Running
IOx service (HA) : Running
IOx service (IOxman) : Running
Libvirtd : Running
Router#
The device is vulnerable if IOx service (CAF) is in the Running state. If
any statement in the following list is true, the device is not affected by
the vulnerability described in this advisory:
IOx service (CAF) is in the Not Running state
The show iox-service privileged EXEC mode command returns no output
The show iox-service privileged EXEC mode command returns an error
Option 2: Use the iox Configuration Command
As an alternative, check the running configuration for the iox
configuration command, as shown in the following example:
Router#sh run | include iox
iox
Router#
The device is vulnerable if the output contains a line with only iox , as
shown in the preceding example. If the iox configuration command does not
return output or this command returns an error, the device is not affected
by the vulnerability described in 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:
510 WPAN Industrial Routers
Industrial Ethernet (IE) 4000 Series Switches
IOS XR Software
NX-OS Software
Workarounds
o There are no workarounds that address this vulnerability.
Cisco recommends that customers who do not want to use the Cisco IOx
application hosting environment can mitigate this vulnerability by
disabling IOx permanently on the device by using the no iox configuration
command.
While this mitigation has been deployed and was proven successful in a test
environment, customers should determine the applicability and effectiveness
in their own environment and under their own use conditions. Customers
should be aware that any workaround or mitigation that is implemented may
negatively impact the functionality or performance of their network based
on intrinsic customer deployment scenarios and limitations. Customers
should not deploy any workarounds or mitigations before first evaluating
the applicability to their own environment and any impact to such
environment.
Fixed Software
o 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.
Fixed Releases
At the time of publication, the following Cisco IOS XE Software releases
contained the fix for this vulnerability:
17.3.2
17.4.2 (scheduled for late March)
17.5.1 and later
At the time of publication, Cisco expected to fix this vulnerability in the
following releases:
Cisco 800 Series Industrial Integrated Services Routers: Cisco IOS
Software releases 15.9(3)M4 and later (scheduled for July).
Cisco CGR 1000 Compute Module: CGR 1000 IOx Compute Platform Firmware
will be addressed in the next release (scheduled for late August).
Cisco IC3000 Industrial Compute Gateway: Industrial Compute Gateway
Software releases 1.4.1 and later.
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
Cisco IOS and IOS XE Software
To help customers determine their exposure to vulnerabilities in Cisco IOS
and IOS XE Software, Cisco provides the Cisco Software Checker to identify
any Cisco Security Advisories that impact a specific 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 also use the following form to determine whether a release is
affected by any Cisco Security Advisory by entering a Cisco IOS or IOS XE
Software release-for example, 15.1(4)M2 or 3.13.8S :
[ ] [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 vulnerability that is
described in this advisory.
Source
o Cisco would like to thank Orange Group 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.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-pt-hWGcPf7g
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-MAR-24 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------------------------------------------------------------
Cisco IOx Application Framework Denial of Service Vulnerability
Priority: Medium
Advisory ID: cisco-sa-iox-dos-4Fgcjh6
First Published: 2021 March 24 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvt74967 CSCvu19405 CSCvv02734 CSCvv02834
CVE Names: CVE-2021-1460
CWEs: CWE-400
Summary
o A vulnerability in the Cisco IOx Application Framework of Cisco 809
Industrial Integrated Services Routers (Industrial ISRs), Cisco 829
Industrial ISRs, Cisco CGR 1000 Compute Module, and Cisco IC3000 Industrial
Compute Gateway could allow an unauthenticated, remote attacker to cause a
denial of service (DoS) condition on an affected device.
This vulnerability is due to insufficient error handling during packet
processing. An attacker could exploit this vulnerability by sending a high
and sustained rate of crafted TCP traffic to the IOx web server on an
affected device. A successful exploit could allow the attacker to cause the
IOx web server to stop processing requests, resulting in a DoS condition.
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-iox-dos-4Fgcjh6
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected the following Cisco
products if they were running a software release earlier than the first
fixed release for that device and were configured with the Cisco IOx
application hosting environment:
809 Industrial ISR: Cisco IOS Software earlier than Release 15.9(3)M3
829 Industrial ISR: Cisco IOS Software earlier than Release 15.9(3)M3
CGR 1000 Compute Module: CGR 1000 IOx Compute Platform Firmware earlier
than Release 1.12.0.3
IC3000 Industrial Compute Gateway: Industrial Compute Gateway Software
earlier than Release 1.3.2
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
Assess the IOx Application Framework
Use the following subsections to determine whether a device is configured
with the Cisco IOx application hosting environment:
Cisco 809 and 829 Industrial Integrated Services Routers
For Cisco 809 and 829 Industrial ISRs, to determine whether the Cisco IOx
application hosting environment is enabled on a device, use the show iox
host list detail | include OS status command at the device CLI.
The following example shows the output of the command for a device that has
the Cisco IOx application hosting environment enabled:
Router#show iox host list detail | include OS status
OS status: RUNNING
If this command does not exist, or if it produces output that does not show
RUNNING in the OS status field, the device is not affected by this
vulnerability.
Cisco CGR 1000 Compute Module
For Cisco CGR 1000 Compute Module, to determine the status of IOx
functionality, use the show iox host list detail | include IOX Server is
running CLI command, as shown in the following example:
CGR1000#show iox host list detail | include IOX Server is running
IOX Server is running. Process ID: 305
CGR1000#
Cisco IC3000 Industrial Compute Gateway
On the Cisco IC3000 Industrial Compute Gateway, the Cisco IOx functionality
is enabled by default.
To determine the status of the IOx functionality, use the show iox summary
CLI command, as shown in the following example:
ic3k>show iox summary
IOx Infrastructure Summary:
eid: IC3000-2C2F-K9+FOC2227Y2UD
pfm: IC3000-2C2F-K9
s/n: FOC2227Y2UD
images: Lnx: 0.13.31., IOx: 1.12.0:r/1.12.0.0:0c30349
boot: 2021-02-25 15:06:08
time: 2021-02-26 20:36:22
load: 20:36:22 up 1 day, 5:30, 1 user, load average: 0.37, 0.35, 0.43
memory: ok, used: 2637/7735 (34%)
disk: warning, used: /:664640/750628 (88%), /software:85834912/87069676 (98%)
process: ok, running: 5/5
networking: ok
logs: warning, errors: caf (6109)
apps: ok, Cisco_Cyber_Vision (R)
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:
Other platforms that support IOx
IOX XE Software
IOS XR Software
NX-OS Software
Details
o The Cisco IOx Application Framework is the management interface that
administrators can use to manage, administer, monitor, and troubleshoot
apps on the host system, and to perform a variety of related activities.
Exploitation of this vulnerability could allow an attacker to cause the
application management functionality to become unavailable.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o 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.
Fixed Releases
At the time of publication, the following Cisco software releases contained
the fix for this vulnerability:
809 Industrial ISRs: Cisco IOS Software Releases 15.9(3)M3 and later
829 Industrial ISRs: Cisco IOS software Releases 15.9(3)M3 and later
CGR 1000 Compute Module: CGR 1000 IOx Compute Platform Firmware
releases 1.12.0.3 and later
IC3000 Industrial Compute Gateway: Industrial Compute Gateway Software
releases 1.3.2 and later
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
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.
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-iox-dos-4Fgcjh6
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-MAR-24 |
+----------+---------------------------+----------+--------+--------------+
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