Cisco Security Advisory
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CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:X
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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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-dos-4Fgcjh6
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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: RUNNINGIf 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
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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.
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There are no workarounds that address this vulnerability.
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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.
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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.
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This vulnerability was found during internal security testing.
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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.
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Show LessVersion Description Section Status Date 1.0 Initial public release. — Final 2021-MAR-24
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