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AUSCERT External Security Bulletin Redistribution
ESB-2021.1472
Cisco Firepower Threat Defense Software security update
29 April 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Firepower Threat Defense Appliances
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Existing Account
Overwrite Arbitrary Files -- Existing Account
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1448 CVE-2021-1402 CVE-2021-1256
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file-overwrite-XknRjGdB
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-cmdinj-vWY5wqZT
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-ssl-decrypt-dos-DdyLuK6c
Comment: This bulletin contains three (3) Cisco Systems security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Firepower Threat Defense Software Command File Overwrite Vulnerability
Priority: Medium
Advisory ID: cisco-sa-ftd-file-overwrite-XknRjGdB
First Published: 2021 April 28 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvu29184
CVE Names: CVE-2021-1256
CWEs: CWE-552
Summary
o A vulnerability in the CLI of Cisco Firepower Threat Defense (FTD) Software
could allow an authenticated, local attacker to overwrite files on the file
system of an affected device by using directory traversal techniques. A
successful exploit could cause system instability if important system files
are overwritten.
This vulnerability is due to insufficient validation of user input for the
file path in a specific CLI command. An attacker could exploit this
vulnerability by logging in to a targeted device and issuing a specific CLI
command with crafted user input. A successful exploit could allow the
attacker to overwrite arbitrary files on the file system of the affected
device. The attacker would need valid user credentials on the 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-ftd-file-overwrite-XknRjGdB
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco FTD Software
releases 6.4.0 and later.
Note : The default configuration is vulnerable.
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, Cisco FTD Software releases 6.6.4 and 6.7.0 and
later contained the fix for this vulnerability.
Note : The First Fixed Release for the 6.6.0 code train was 6.6.3; however,
due to upgrade issues associated with CSCvx86231 the recommended release is
6.6.4.
At the time of publication, Cisco expected to fix this vulnerability in
Cisco FTD Software Release 6.4.0.12, scheduled for May 2021.
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
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.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file-overwrite-XknRjGdB
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-APR-28 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------------------------------------------------------------
Cisco Firepower Threat Defense Software Command Injection Vulnerability
Priority: High
Advisory ID: cisco-sa-ftd-cmdinj-vWY5wqZT
First Published: 2021 April 28 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvt74832 CSCvv78677
CVE Names: CVE-2021-1448
CWEs: CWE-20
CVSS Score:
7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
o A vulnerability in the CLI of Cisco Firepower Threat Defense (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.
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 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-ftd-cmdinj-vWY5wqZT
This advisory is part of the April 2021 Cisco ASA, FMC, and FTD Software
Security Advisory Bundled Publication. For a complete list of the
advisories and links to them, see Cisco Event Response: April 2021 Cisco
ASA, FMC, and FTD Software Security Advisory Bundled Publication .
Affected Products
o Vulnerable Products
This vulnerability affects the following Cisco products if they are running
a vulnerable release of Cisco FTD Software that is configured for
multi-instance operation:
Firepower 4100 Series appliances
Firepower 9300 Series appliances
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 None
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.
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 vulnerabilities described in this
bundle and which release includes fixes for those vulnerabilities.
FTD Software
Cisco FTD First Fixed Release Recommended Fixed Release for All
Software for This Vulnerabilities Described in the Bundle
Release Vulnerability of Advisories
Earlier than Not vulnerable. Migrate to a fixed release.
6.2.2 ^1
6.2.2 Not vulnerable. Migrate to a fixed release.
6.2.3 Not vulnerable. Migrate to a fixed release.
6.3.0 Not vulnerable. Migrate to a fixed release.
6.4.0 6.4.0.10 6.4.0.12 (May 2021)
6.5.0 6.5.0.5 Migrate to a fixed release.
6.6.0 6.6.1 6.6.4 ^2
6.7.0 Not vulnerable. 6.7.0.2
1. Cisco FMC and FTD Software releases 6.0.1 and earlier, as well as
releases 6.2.0 and 6.2.1, have reached end of software maintenance .
Customers are advised to migrate to a supported release that includes the
fix for this vulnerability.
2. The First Fixed Release for the 6.6.0 code train was 6.6.3; however, due
to upgrade issues associated with CSCvx86231 the recommended release is
6.6.4.
To upgrade to a fixed release of Cisco FTD Software, do one of the
following:
For devices that are managed by using Cisco Firepower Management Center
(FMC), use the FMC interface to install the upgrade. After installation
is complete, reapply the access control policy.
For devices that are managed by using Cisco Firepower Device Manager
(FDM), use the FDM interface to install the upgrade. After installation
is complete, reapply the access control policy.
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 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: April 2021 Cisco ASA, FMC, and FTD Software Security
Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-cmdinj-vWY5wqZT
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-APR-28 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------------------------------------------------------------
Cisco Firepower Threat Defense Software SSL Decryption Policy Denial of Service
Vulnerability
Priority: High
Advisory ID: cisco-sa-ftd-ssl-decrypt-dos-DdyLuK6c
First Published: 2021 April 28 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvo46649
CVE Names: CVE-2021-1402
CWEs: CWE-119
CVSS Score:
8.6 AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X
Summary
o A vulnerability in the software-based SSL/TLS message handler of Cisco
Firepower Threat Defense (FTD) Software could allow an unauthenticated,
remote attacker to trigger a reload of an affected device, resulting in a
denial of service (DoS) condition.
The vulnerability is due to insufficient validation of SSL/TLS messages
when the device performs software-based SSL decryption. An attacker could
exploit this vulnerability by sending a crafted SSL/TLS message through an
affected device. SSL/TLS messages sent to an affected device do not trigger
this vulnerability. A successful exploit could allow the attacker to cause
a process to crash. This crash would then trigger a reload of the device.
No manual intervention is needed to recover the device after the reload.
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-ssl-decrypt-dos-DdyLuK6c
This advisory is part of the April 2021 Cisco ASA, FMC, and FTD Software
Security Advisory Bundled Publication. For a complete list of the
advisories and links to them, see Cisco Event Response: April 2021 Cisco
ASA, FMC, and FTD Software Security Advisory Bundled Publication .
Affected Products
o Vulnerable Products
This vulnerability affects the following Cisco products if they are running
a vulnerable release of Cisco FTD Software, have an SSL decryption policy
enabled, and are running one of the following hardware platforms:
3000 Series Industrial Security Appliances (ISAs)
ASA 5512-X Adaptive Security Appliance
ASA 5515-X Adaptive Security Appliance
ASA 5525-X Adaptive Security Appliance
ASA 5545-X Adaptive Security Appliance
ASA 5555-X Adaptive Security Appliance
Firepower 1000 Series
Firepower 2100 Series
Firepower Threat Defense Virtual (FTDv)
For information about which Cisco software releases are vulnerable, see the
Fixed Software section of this advisory.
Determine Whether an SSL Decryption Policy Is Enabled
There are two methods for determining whether an SSL decryption policy is
enabled:
Option 1: Use the CLI
Use the show ssl-policy-config CLI command to verify whether an SSL
decryption policy is enabled on a device. The following example shows the
output of the show ssl-policy-config command on a device that does not have
an SSL policy configured and is not vulnerable:
> show ssl-policy-config
SSL policy not yet applied.
Any other output returned by the show ssl-policy-config command indicates
that an SSL policy is configured and the device is vulnerable.
For more information about the show ssl-policy-config command, see the
Cisco Firepower Threat Defense Command Reference .
Option 2: Use the GUI
To determine whether an SSL decryption policy is enabled on a device, check
the appropriate policy:
For devices managed by Firepower Management Center (FMC) :
Policies > Access Control > SSL
For devices managed by Firepower Device Manager (FDM) :
Policies > SSL Decryption
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:
Adaptive Security Appliance (ASA) Software
Firepower Management Center (FMC) Software
FTD Software that is running on any platform other than the platforms
listed in the Vulnerable Products section of this advisory
Workarounds
o There are no workarounds that address this vulnerability.
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 vulnerabilities described in this
bundle and which release includes fixes for those vulnerabilities.
FTD Software
Cisco FTD First Fixed Release Recommended Fixed Release for All
Software for This Vulnerabilities Described in the Bundle
Release Vulnerability of Advisories
Earlier than Not vulnerable. Migrate to a fixed release.
6.2.2 ^1
6.2.2 Not vulnerable. Migrate to a fixed release.
6.2.3 Not vulnerable. Migrate to a fixed release.
6.3.0 Migrate to a fixed Migrate to a fixed release.
release.
6.4.0 6.4.0 6.4.0.12 (May 2021)
6.5.0 6.5.0 Migrate to a fixed release.
6.6.0 6.6.0 6.6.4 ^2
6.7.0 6.7.0 6.7.0.2
1. Cisco FMC and FTD Software releases 6.0.1 and earlier, as well as
releases 6.2.0 and 6.2.1, have reached end of software maintenance .
Customers are advised to migrate to a supported release that includes the
fix for this vulnerability.
2. The First Fixed Release for the 6.6.0 code train was 6.6.3; however, due
to upgrade issues associated with CSCvx86231 the recommended release is
6.6.4.
To upgrade to a fixed release of Cisco FTD Software, customers can do one
of the following:
For devices that are managed by using Cisco Firepower Management Center
(FMC), use the FMC interface to install the upgrade. After installation
is complete, reapply the access control policy.
For devices that are managed by using Cisco Firepower Device Manager
(FDM), use the FDM interface to install the upgrade. After installation
is complete, reapply the access control policy.
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 Sanmith Prakash 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: April 2021 Cisco ASA, FMC, and FTD Software Security
Advisory Bundled Publication
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-ssl-decrypt-dos-DdyLuK6c
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-APR-28 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------END INCLUDED TEXT--------------------
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