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AUSCERT External Security Bulletin Redistribution
ESB-2022.4820
Cisco IOS XE Wireless Controller Software for the Catalyst
9000 Family SNMP Information Disclosure Vulnerability
29 September 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Catalyst 9000 Family
Publisher: Cisco Systems
Operating System: Cisco
Resolution: Patch/Upgrade
CVE Names: CVE-2022-20810
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cwlc-snmpidv-rnyyQzUZ
Comment: CVSS (Max): 6.5 CVE-2022-20810 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
CVSS Source: Cisco Systems
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family SNMP
Information Disclosure Vulnerability
Priority: Medium
Advisory ID: cisco-sa-cwlc-snmpidv-rnyyQzUZ
First Published: 2022 September 28 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvz99497
CVE Names: CVE-2022-20810
CWEs: CWE-202
Summary
o A vulnerability in the Simple Network Management Protocol (SNMP) of Cisco
IOS XE Wireless Controller Software for the Catalyst 9000 Family could
allow an authenticated, remote attacker to access sensitive information.
This vulnerability is due to insufficient restrictions that allow a
sensitive configuration detail to be disclosed. An attacker could exploit
this vulnerability by retrieving data through SNMP read-only community
access. A successful exploit could allow the attacker to view Service Set
Identifier (SSID) preshared keys (PSKs) that are configured on the affected
device.
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-cwlc-snmpidv-rnyyQzUZ
This advisory is part of the September 2022 release of the Cisco IOS and
IOS XE Software Security Advisory Bundled Publication. For a complete list
of the advisories and links to them, see Cisco Event Response: September
2022 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled
Publication.
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected the following Cisco
products if they were running a vulnerable release of Cisco IOS XE Software
and had SNMP enabled:
Catalyst 9800-CL Wireless Controllers for Cloud
Catalyst 9800 Embedded Wireless Controller for Catalyst 9300, 9400, and
9500 Series Switches
Catalyst 9800 Series Wireless Controllers
Embedded Wireless Controller on Catalyst Access Points
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:
IOS Software
IOS XR Software
Meraki products
NX-OS Software
Workarounds
o There are no workarounds that address this vulnerability.
However, administrators may enable encryption of user passwords and SSID
PSKs as a mitigation with the key config-key password-encrypt and password
encryption aes commands, as shown in the following example:
c9800-1(config)#key config-key password-encrypt
c9800-1(config)#password encryption aes
Note: Once the passwords and PSKs are encrypted, there is no mechanism to
decrypt them, as a security best practice. The only way to recover them
would be to reconfigure them.
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.
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 . This tool
identifies any Cisco security advisories that impact a specific software
release and the earliest release that fixes the vulnerabilities that are
described in each advisory ("First Fixed"). If applicable, the tool also
returns the earliest release that fixes all the vulnerabilities that are
described in all the advisories that the Software Checker identifies
("Combined First Fixed").
To use the tool, go to the Cisco Software Checker page and follow the
instructions. Alternatively, use the following form to determine whether a
release is affected by any Cisco Security Advisory. To use the form, follow
these steps:
1. Choose which advisories the tool will search-only this advisory, only
advisories with a Critical or High Security Impact Rating (SIR) , or
all advisories.
2. Enter a release number-for example, 15.9(3)M2 or 17.3.3.
3. Click Check
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 the external researcher who reported 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.
Related to This Advisory
o Cisco Event Response: September 2022 Semiannual Cisco IOS and IOS XE
Software Security Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cwlc-snmpidv-rnyyQzUZ
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2022-SEP-28 |
+----------+---------------------------+----------+--------+--------------+
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