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AUSCERT External Security Bulletin Redistribution
ESB-2022.5762
Cisco FirePOWER Software for ASA FirePOWER Module, Firepower Management
Center Software, and NGIPS Software SNMP Default Credential Vulnerability
10 November 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: FirePOWER Software for ASA FirePOWER Module
NGIPS Software
Firepower Management Center Software
Publisher: Cisco Systems
Operating System: Cisco
Resolution: Patch/Upgrade
CVE Names: CVE-2022-20918
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmcsfr-snmp-access-6gqgtJ4S
Comment: CVSS (Max): 7.5 CVE-2022-20918 (CVSS:3.1/AV:N/AC:L/PR:N/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:N/UI:N/S:U/C:H/I:N/A:N
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Cisco FirePOWER Software for ASA FirePOWER Module, Firepower Management Center
Software, and NGIPS Software SNMP Default Credential Vulnerability
Priority: High
Advisory ID: cisco-sa-fmcsfr-snmp-access-6gqgtJ4S
First Published: 2022 November 9 16:00 GMT
Version 1.0: Final
Workarounds: Yes
Cisco Bug IDs: CSCwa97541
CVE Names: CVE-2022-20918
CWEs: CWE-284
Summary
o A vulnerability in the Simple Network Management Protocol (SNMP) access
controls for Cisco FirePOWER Software for Adaptive Security Appliance (ASA)
FirePOWER module, Cisco Firepower Management Center (FMC) Software, and
Cisco Next-Generation Intrusion Prevention System (NGIPS) Software could
allow an unauthenticated, remote attacker to perform an SNMP GET request
using a default credential.
This vulnerability is due to the presence of a default credential for SNMP
version 1 (SNMPv1) and SNMP version 2 (SNMPv2). An attacker could exploit
this vulnerability by sending an SNMPv1 or SNMPv2 GET request to an
affected device. A successful exploit could allow the attacker to retrieve
sensitive information from the device using the default credential.
This attack will only be successful if SNMP is configured, and the attacker
can only perform SNMP GET requests; write access using SNMP is not allowed.
Cisco has released software updates that address this vulnerability. There
are workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmcsfr-snmp-access-6gqgtJ4S
This advisory is part of the November 2022 release of the Cisco ASA, FTD,
and FMC Security Advisory Bundled publication. For a complete list of the
advisories and links to them, see Cisco Event Response: November 2022
Semiannual Cisco ASA, FMC, and FTD Software Security Advisory Bundled
Publication .
Affected Products
o Vulnerable Products
This vulnerability affects devices that are running Cisco FirePOWER
Software for ASA FirePOWER module, Cisco FMC Software, or Cisco NGIPS
Software releases 7.0.0 through 7.0.4 if they have any version of SNMP
enabled. This vulnerability is fixed in software Release 7.0.5 and later.
For information about which Cisco software releases are vulnerable, see the
Fixed Software section of this advisory.
Determine the Device Configuration
To determine whether SNMP is enabled on Cisco FirePOWER Software for ASA
FirePOWER module or Cisco NGIPS Software using devices that are managed by
Cisco FMC Software, choose Devices > Platform Settings > Enable SNMP
Servers . If the interface of an SNMP server in the SNMP Host tab is
configured for the Cisco FirePOWER Software for ASA FirePOWER module
management interface, then the device is considered vulnerable.
To determine whether SNMP is enabled on Cisco FMC Software, choose Devices
> Device Management . If Admin State is checked, SNMP is enabled.
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 Cisco ASA
Software or Cisco Firepower Threat Defense (FTD) Software.
Workarounds
o A user with Administrator privileges can execute the following commands in
expert mode to apply a workaround for this vulnerability:
# expert
# sudo su -
# sed -i 's/^com2sec/#com2sec/' /etc/snmp/snmpd.conf
# pmtool restartbyid snmpd
If SNMP is not needed on the device, the administrator can remove the SNMP
configuration so the device will not be affected by this vulnerability. The
administrator can also reduce the attack surface by allowing SNMP
connections only from trusted SNMP monitoring hosts.
While this workaround and mitigation have been deployed and were 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 Cisco has released free software updates that address the vulnerability
described in this advisory. Customers with service contracts that entitle
them to regular software updates should obtain security fixes through their
usual update channels.
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.
The Cisco Support and Downloads page on Cisco.com provides information
about licensing and downloads. This page can also display customer device
support coverage for customers who use the My Devices tool.
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.
Cisco ASA, FMC, and FTD Software
To help customers determine their exposure to vulnerabilities in Cisco ASA,
FMC, and FTD 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 search for
vulnerabilities that affect a specific software release. To use the form,
follow these steps:
1. Choose which advisories the tool will search-all advisories, only
advisories with a Critical or High Security Impact Rating (SIR) , or
only this advisory.
2. Choose the appropriate software.
3. Choose the appropriate platform.
4. Enter a release number-for example, 9.16.2.11 for Cisco ASA Software or
6.6.7 for Cisco FTD Software.
5. Click Check .
Cisco FirePOWER Software for ASA FirePOWER Module and Cisco NGIPS Software
At the time of publication, the release information in the following table
(s) was accurate. See the Details section in the bug ID(s) at the top of
this advisory for the most complete and current information.
The left column lists Cisco software releases, and the right column
indicates whether a release was affected by the vulnerability that is
described in this advisory and which release included the fix for this
vulnerability.
Cisco FirePOWER Software Release First Fixed Release
Earlier than 7.0 Not vulnerable
7.0 ^1 7.0.5
1. Cisco FirePOWER Software Release 7.0 is the final release for the Cisco
ASA FirePOWER module and Cisco NGIPS Software.
Additional Resources
For help determining the best Cisco ASA, FTD, or FMC Software release, see
the following Recommended Releases documents. If a security advisory
recommends a later release, Cisco recommends following the advisory
guidance.
Cisco ASA Compatibility
Cisco Secure Firewall ASA Upgrade Guide
Cisco Secure Firewall Threat Defense Compatibility Guide
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 This vulnerability was found during the resolution of a Cisco TAC support
case.
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: November 2022 Semiannual Cisco ASA, FMC, and FTD
Software Security Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmcsfr-snmp-access-6gqgtJ4S
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2022-NOV-09 |
+----------+---------------------------+----------+--------+--------------+
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