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AUSCERT External Security Bulletin Redistribution
ESB-2022.4195
Cisco FXOS Software Command Injection Vulnerability
25 August 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco FXOS Software
Publisher: Cisco Systems
Operating System: Cisco
Resolution: Patch/Upgrade
CVE Names: CVE-2022-20865
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fxos-cmdinj-TxcLNZNH
Comment: CVSS (Max): 6.7 CVE-2022-20865 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: Cisco Systems
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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Cisco FXOS Software Command Injection Vulnerability
Priority: Medium
Advisory ID: cisco-sa-fxos-cmdinj-TxcLNZNH
First Published: 2022 August 24 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCwc38361
CVE Names: CVE-2022-20865
CWEs: CWE-78
Summary
o A vulnerability in the CLI of Cisco FXOS Software could allow an
authenticated, local attacker to inject arbitrary commands that are
executed with root privileges. The attacker would need to have
Administrator privileges on the device.
This vulnerability is due to insufficient input validation of commands
supplied by the user. An attacker could exploit this vulnerability by
authenticating to a device and submitting crafted input to the affected
command. A successful exploit could allow the attacker to execute commands
on the underlying operating system with root privileges.
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-fxos-cmdinj-TxcLNZNH
This advisory is part of the August 2022 Cisco FXOS and NX-OS Software
Security Advisory Bundled Publication. For a complete list of the
advisories and links to them, see Cisco Event Response: August 2022
Semiannual Cisco FXOS and NX-OS 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 FXOS Software:
Firepower 4100 Series
Firepower 9300 Security Appliances
For information about which Cisco software releases were vulnerable at the
time of publication, 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.
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:
Firepower 1000 Series
Firepower 2100 Series
MDS 9000 Series Multilayer Switches
Nexus 1000 Virtual Edge for VMware vSphere
Nexus 1000V Switch for Microsoft Hyper-V
Nexus 1000V Switch for VMware vSphere
Nexus 3000 Series Switches
Nexus 5500 Platform Switches
Nexus 5600 Platform Switches
Nexus 6000 Series Switches
Nexus 7000 Series Switches
Nexus 9000 Series Fabric Switches in ACI mode
Nexus 9000 Series Switches in standalone NX-OS mode
UCS 6200 Series Fabric Interconnects
UCS 6300 Series Fabric Interconnects
UCS 6400 Series Fabric Interconnects
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.
Cisco FXOS Software
To help customers determine their exposure to vulnerabilities in Cisco FXOS
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-only this advisory, only
advisories with a Critical or High Security Impact Rating (SIR) , or
all advisories.
2. Choose the appropriate platform.
3. Enter a release number-for example, 2.9.1.158 for Cisco Firepower 4100
Series Security Appliances.
4. 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 This vulnerability was found by Ilkin Gasimov of Cisco 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.
Related to This Advisory
o Cisco Event Response: August 2022 Semiannual Cisco FXOS and NX-OS Software
Security Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fxos-cmdinj-TxcLNZNH
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2022-AUG-24 |
+----------+---------------------------+----------+--------+--------------+
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