Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2021.3597
Cisco Firepower Threat Defense Software multiple vulnerabilities
28 October 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Firepower Threat Defense Software
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Existing Account
Execute Arbitrary Code/Commands -- Existing Account
Overwrite Arbitrary Files -- Existing Account
Denial of Service -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-34781 CVE-2021-34761 CVE-2021-34756
CVE-2021-34755 CVE-2021-34754 CVE-2021-34753
CVE-2021-34752
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file-write-SHVcmQVc
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-cmdinject-FmzsLN8
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-enip-bypass-eFsxd8KP
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-dos-rUDseW3r
Comment: This bulletin contains four (4) Cisco Systems security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Firepower Threat Defense Software CLI Arbitrary File Write Vulnerability
Priority: Medium
Advisory ID: cisco-sa-ftd-file-write-SHVcmQVc
First Published: 2021 October 27 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvy41757
CVE Names: CVE-2021-34761
CWEs: CWE-73
Summary
o A vulnerability in Cisco Firepower Threat Defense (FTD) Software could
allow an authenticated, local attacker to overwrite or append arbitrary
data to system files using root -level privileges. The attacker must have
administrative credentials on the device.
This vulnerability is due to incomplete validation of user input for a
specific CLI command. An attacker could exploit this vulnerability by
authenticating to the device with administrative privileges and issuing a
CLI command with crafted user parameters. A successful exploit could allow
the attacker to overwrite or append arbitrary data to system files using
root -level 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-ftd-file-write-SHVcmQVc
This advisory is part of the October 2021 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: October 2021 Cisco
ASA, FMC, and FTD Software Security Advisory Bundled Publication .
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco FTD Software.
Note: The default configuration is vulnerable.
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 Cisco Adaptive
Security Appliance (ASA) Software or Cisco Firepower Management Center
(FMC) Software.
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 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 described in
this advisory and which release included the fix for this vulnerability.
FTD Software
Cisco FTD Software Release First Fixed Release for This Vulnerability
6.2.2 and earlier ^1 Migrate to a fixed release.
6.2.3 Migrate to a fixed release.
6.3.0 ^1 Migrate to a fixed release.
6.4.0 6.4.0.13 (Nov 2021)
6.5.0 ^1 Migrate to a fixed release.
6.6.0 6.6.5
6.7.0 6.7.0.3 (Jan 2022)
7.0.0 7.0.1
1. Cisco FMC and FTD Software releases 6.2.2 and earlier, as well as
releases 6.3.0 and 6.5.0, have reached end of software maintenance .
Customers are advised to migrate to a supported release that includes the
fix for this vulnerability.
For instructions on upgrading your FTD device, see Cisco Firepower
Management Center Upgrade 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 by Brandon Sakai 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: October 2021 Cisco ASA, FMC, and FTD Software
Security Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file-write-SHVcmQVc
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-OCT-27 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------------------------------------------------------------
Cisco Firepower Threat Defense Software Command Injection Vulnerabilities
Priority: High
Advisory ID: cisco-sa-ftd-cmdinject-FmzsLN8
First Published: 2021 October 27 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvx86283 CSCvy16559 CSCvy16573 CSCvy19225
CVE Names: CVE-2021-34752 CVE-2021-34755 CVE-2021-34756
CWEs: CWE-20 CWE-77
Summary
o Multiple vulnerabilities in the CLI of Cisco Firepower Threat Defense (FTD)
Software could allow an authenticated, local attacker to execute arbitrary
commands with root privileges.
For more information about these vulnerabilities, see the Details section
of this advisory.
Cisco has released software updates that address these vulnerabilities.
There are no workarounds that address these vulnerabilities.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-cmdinject-FmzsLN8
This advisory is part of the October 2021 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: October 2021 Cisco
ASA, FMC, and FTD Software Security Advisory Bundled Publication .
Affected Products
o Vulnerable Products
These vulnerabilities affect Cisco FTD Software.
For information about which Cisco software releases are vulnerable, see the
Fixed Software section of this advisory.
Determine the Affected FTD Software Configuration
In the following table, the left column indicates the Cisco FTD Software
configuration and the right column indicates the associated Cisco CVE IDs
that are described in the Details section of this advisory.
Cisco FTD Configuration Associated CVE IDs
Multi-instance ^1,2 CVE-2021-34755 and CVE-2021-34756
Default CVE-2021-34752
1. The multi-instance configuration is supported as of Cisco FTD Software
Release 6.3.0, so earlier releases are not affected by these multi-instance
vulnerabilities.
2. The only Cisco FTD Software platforms that support multi-instance
operation are:
Firepower 4100 Series Security Appliances
Firepower 9300 Series Security Appliances
Determine the Device Configuration
Note: This section applies only to CVE-2021-34755 and CVE-2021-34756, which
require multi-instance configuration.
To determine whether a device is providing multi-instance services, log in
to the Cisco FXOS CLI and use the show app-instance command within the ssa
scope. If the Deploy Type field has a value of Container , application
instances are present and the device is affected by this vulnerability. The
following example shows the command output for an affected device:
firepower# scope ssa
firepower /ssa # show app-instance
App Identifier Slot Admin Oper Running Startup Deploy Turbo Profile Cluster Cluster
Name ID State State Version Version Type Mode Name State Role
----- ------- ------ ------ ----- ------- ------- ------ ----- ----- ------- -------
ftd ftd1 1 Enabled Online 6.2.3.14 6.2.3.14 Native No Not None
Applicable
ftd ftd2-1 2 Enabled Online 6.4.0.4 6.4.0.4 Container No mid Not None
Applicable
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this these vulnerabilities.
Cisco has confirmed that these vulnerabilities do not affect Cisco Adaptive
Security Appliance (ASA) Software or Cisco Firepower Management Center
(FMC) Software.
Details
o The vulnerabilities are not dependent on one another. Exploitation of one
of the vulnerabilities is not required to exploit another vulnerability. In
addition, a software release that is affected by one of the vulnerabilities
may not be affected by the other vulnerabilities.
Details about the vulnerabilities are as follows:
CVE-2021-34755 and CVE-2021-34756: Cisco FTD Software Command Injection
Vulnerabilities
Multiple vulnerabilities in the CLI of Cisco FTD Software could allow an
authenticated, local attacker to execute arbitrary commands with root
privileges on the underlying operating system of an affected device that is
running in multi-instance mode.
These vulnerabilities are due to insufficient validation of user-supplied
command arguments. An attacker could exploit these vulnerabilities by
submitting crafted input to the affected command. A successful exploit
could allow the attacker to execute commands with root privileges on the
underlying operating system.
Cisco has released software updates that address these vulnerabilities.
There are no workarounds that address these vulnerabilities.
Bug ID(s): CSCvx86283 , CSCvy16559
CVE IDs: CVE-2021-34755 and CVE-2021-34756
Security Impact Rating (SIR): High
CVSS Base Score: 7.8
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE-2021-34752: Cisco FTD Software Command Injection Vulnerability
A vulnerability in the CLI of Cisco FTD Software could allow an
authenticated, local attacker with administrative privileges to execute
arbitrary commands with root privileges on the underlying operating system
of an affected device.
This vulnerability is due to insufficient validation of user-supplied
command arguments. An attacker could exploit this vulnerability by
submitting crafted input to the affected commands. A successful exploit
could allow the attacker to execute commands with root privileges on the
underlying operating system.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
Bug ID(s): CSCvy16573 , CSCvy19225
CVE ID: CVE-2021-34752
Security Impact Rating (SIR): Medium
CVSS Base Score: 6.7
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Workarounds
o There are no workarounds that address these vulnerabilities.
Fixed Software
o Cisco has released free software updates that address the vulnerabilities
described in this advisory. 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.
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.
Fixed Releases
In the following table(s), the left column lists Cisco software releases.
The center column indicates whether a release is affected by the
vulnerability described in this advisory and the first release that
includes the fix for this vulnerability. The right column indicates whether
a release is affected by any of the vulnerabilities described in this
bundle and which release includes fixes for those vulnerabilities.
FTD Software
Cisco FTD First Fixed Release First Fixed Release for All
Software for This Vulnerabilities Described in the Bundle
Release Vulnerability of Advisories
6.2.2 and Migrate to a fixed Migrate to a fixed release.
earlier ^1 release.
6.2.3 Migrate to a fixed Migrate to a fixed release.
release.
6.3.0 ^1 Migrate to a fixed Migrate to a fixed release.
release.
6.4.0 6.4.0.13 (Nov 2021) 6.4.0.13 (Nov 2021)
6.5.0 ^1 Migrate to a fixed Migrate to a fixed release.
release.
6.6.0 6.6.5 6.6.5.1 (Nov 2021)
6.7.0 6.7.0.3 (Jan 2022) 6.7.0.3 (Jan 2022)
7.0.0 7.0.1 7.0.1
1. Cisco FMC and FTD Software releases 6.2.2 and earlier, as well as
releases 6.3.0 and 6.5.0, have reached end of software maintenance .
Customers are advised to migrate to a supported release that includes the
fix for these vulnerabilities.
For instructions on upgrading your FTD device, see Cisco Firepower
Management Center Upgrade 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 CVE-2021-34755: This vulnerability was found by Ilkin Gasimov of Cisco
during internal security testing.
CVE-2021-34756 and CVE-2021-34752: These vulnerabilities were found by
Brandon Sakai 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: October 2021 Cisco ASA, FMC, and FTD Software
Security Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-cmdinject-FmzsLN8
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-OCT-27 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------------------------------------------------------------
Cisco Firepower Threat Defense Software Ethernet Industrial Protocol Policy
Bypass Vulnerabilities
Priority: Medium
Advisory ID: cisco-sa-ftd-enip-bypass-eFsxd8KP
First Published: 2021 October 27 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvy02240
CVE Names: CVE-2021-34753 CVE-2021-34754
CWEs: CWE-284
Summary
o Multiple vulnerabilities in the payload inspection for Ethernet Industrial
Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software
could allow an unauthenticated, remote attacker to bypass configured rules
for ENIP traffic.
These vulnerabilities are due to incomplete processing during deep packet
inspection for ENIP packets. An attacker could exploit these
vulnerabilities by sending a crafted ENIP packet to the targeted interface.
A successful exploit could allow the attacker to bypass configured access
control and intrusion policies that should be activated for the ENIP
packet.
Cisco has released software updates that address these vulnerabilities.
There are no workarounds that address these vulnerabilities.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-enip-bypass-eFsxd8KP
This advisory is part of the October 2021 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: October 2021 Cisco
ASA, FMC, and FTD Software Security Advisory Bundled Publication .
Affected Products
o Vulnerable Products
At the time of publication, these vulnerabilities affected Cisco FTD
Software if it was configured to detect and block ENIP traffic.
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 these vulnerabilities.
Cisco has confirmed that these vulnerabilities do not affect Cisco Adaptive
Security Appliance (ASA) Software or Cisco Firepower Management Center
(FMC) Software.
Workarounds
o There are no workarounds that address these vulnerabilities.
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 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 vulnerabilities described
in this advisory and which release included the fix for these
vulnerabilities.
FTD Software
Cisco FTD Software Release First Fixed Release for These Vulnerabilities
6.2.2 and earlier ^1 Migrate to a fixed release.
6.2.3 Migrate to a fixed release.
6.3.0 ^1 Migrate to a fixed release.
6.4.0 6.4.0.13 (Nov 2021)
6.5.0 ^1 Migrate to a fixed release.
6.6.0 6.6.5.1 (Nov 2021)
6.7.0 6.7.0.3 (Jan 2022)
7.0.0 7.0.1
1. Cisco FMC and FTD Software releases 6.2.2 and earlier, as well as
releases 6.3.0 and 6.5.0, have reached end of software maintenance .
Customers are advised to migrate to a supported release that includes the
fix for these vulnerabilities.
For instructions on upgrading your FTD device, see Cisco Firepower
Management Center Upgrade 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 vulnerabilities that are described in this advisory.
Source
o Cisco would like to thank Gregory Norton, Thuy Nguyen, and Cynthia Irvine
of the Naval Postgraduate School for reporting these vulnerabilities.
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: October 2021 Cisco ASA, FMC, and FTD Software
Security Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-enip-bypass-eFsxd8KP
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-OCT-27 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------------------------------------------------------------
Cisco Firepower Threat Defense Software SSH Connections Denial of Service
Vulnerability
Priority: High
Advisory ID: cisco-sa-ftd-dos-rUDseW3r
First Published: 2021 October 27 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvy13543
CVE Names: CVE-2021-34781
CWEs: CWE-119
Summary
o A vulnerability in the processing of SSH connections for multi-instance
deployments of Cisco Firepower Threat Defense (FTD) Software could allow an
unauthenticated, remote attacker to cause a denial of service (DoS)
condition on the affected device.
This vulnerability is due to a lack of proper error handling when an SSH
session fails to be established. An attacker could exploit this
vulnerability by sending a high rate of crafted SSH connections to the
instance. A successful exploit could allow the attacker to cause resource
exhaustion, which causes a DoS condition on the affected device. The device
must be manually reloaded to recover.
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-ftd-dos-rUDseW3r
This advisory is part of the October 2021 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: October 2021 Cisco
ASA, FMC, and FTD Software Security Advisory Bundled Publication .
Affected Products
o Vulnerable Products
This vulnerability affects devices if they are running a vulnerable release
of Cisco FTD Software that is configured for multi-instance operation.
Multi-instance configuration support was introduced in Cisco FTD Software
Release 6.3.0; earlier releases are not affected by this multi-instance
vulnerability.
The only Cisco FTD Software platforms that support multi-instance operation
are the following:
Firepower 4100 Series Security Appliances
Firepower 9300 Series Security Appliances
Note: Affected devices are vulnerable only when accessed from an IP address
in the configured SSH command range. The SSH service is enabled by default
on all devices that run Cisco FTD Software.
For information about which Cisco software releases are vulnerable, see the
Fixed Software section of this advisory.
Determine the Device Configuration
To determine whether a device is providing multi-instance services, log in
to the Cisco FXOS CLI and use the show app-instance command within the ssa
scope. If the Deploy Type field has a value of Container , application
instances are present and the device is vulnerable. The following example
shows the command output for a vulnerable device:
firepower# scope ssa
firepower /ssa # show app-instance
App Identifier Slot Admin Oper Running Startup Deploy Turbo Profile Cluster Cluster
Name ID State State Version Version Type Mode Name State Role
----- ------- ------ ------ ----- ------- ------- ------ ----- ----- ------- -------
ftd ftd1 1 Enabled Online 6.2.3.14 6.2.3.14 Native No Not None
Applicable
ftd ftd2-1 2 Enabled Online 6.4.0.4 6.4.0.4 Container No mid Not
Applicable
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 Adaptive
Security Appliance (ASA) Software or Cisco Firepower Management Center
(FMC) Software.
Workarounds
o There are no workarounds that address this vulnerability.
However, as a mitigation, administrators can allow only trusted networks
and hosts to have SSH access to the FTD management IP. This will limit the
attack surface of this vulnerability. See Harden FTD User Access for more
information.
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 Cisco has released free software updates that address the vulnerability
described in this advisory. 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.
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.
Fixed Releases
In the following table(s), the left column lists Cisco software releases.
The center column indicates whether a release is affected by the
vulnerability described in this advisory and the first release that
includes the fix for this vulnerability. The right column indicates whether
a release is affected by any of the Critical or High SIR vulnerabilities
described in this bundle and which release includes fixes for those
vulnerabilities.
FTD Software
Cisco FTD Release First Fixed Release First Fixed Release for All
for This Vulnerabilities Described in the
Vulnerability Bundle of Advisories
6.2.2 and earlier ^1 Not vulnerable. Migrate to a fixed release.
6.2.3 Not vulnerable. Migrate to a fixed release.
6.3.0 ^1 Migrate to a fixed Migrate to a fixed release.
release.
6.4.0 6.4.0.13 (Nov 2021) 6.4.0.13 (Nov 2021)
6.5.0 ^1 Migrate to a fixed Migrate to a fixed release.
release.
6.6.0 6.6.5 6.6.5.1 (Nov 2021)
6.7.0 6.7.0.3 (Jan 2022) 6.7.0.3 (Jan 2022)
7.0.0 7.0.1 7.0.1
1. Cisco FMC and FTD Software releases 6.2.2 and earlier, as well as
releases 6.3.0 and 6.5.0, have reached end of software maintenance .
Customers are advised to migrate to a supported release that includes the
fix for this vulnerability.
For instructions on upgrading your FTD device, see Cisco Firepower
Management Center Upgrade 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: October 2021 Cisco ASA, FMC, and FTD Software
Security Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-dos-rUDseW3r
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-OCT-27 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=Tw5C
-----END PGP SIGNATURE-----