ESB-2021.1468

Operating System:

Published:

29 April 2021

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Resources > Security Bulletins > ESB-2021.1468

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AUSCERT External Security Bulletin Redistribution

ESB-2021.1468
Cisco Adaptive Security Appliance Software and Cisco
Firepower Threat Defense Software security update
29 April 2021

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AusCERT Security Bulletin Summary
---------------------------------

Product: Adaptive Security Appliance Software
Firepower Threat Defense Software
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Existing Account
Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1504 CVE-2021-1501 CVE-2021-1493
CVE-2021-1488 CVE-2021-1476 CVE-2021-1445

Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-sipdos-GGwmMerC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-cmd-inj-SELprvG
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-memc-dos-fncTyYKG
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-vpn-dos-fpBcpEcD
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-cmdinj-TKyQfDcU

Comment: This bulletin contains five (5) Cisco Systems security advisories.

- --------------------------BEGIN INCLUDED TEXT--------------------

Cisco Adaptive Security Appliance Software and Cisco Firepower Threat Defense
Software SIP Denial of Service Vulnerability

Priority: High
Advisory ID: cisco-sa-asa-ftd-sipdos-GGwmMerC
First Published: 2021 April 28 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvw26544
CVE Names: CVE-2021-1501
CWEs: CWE-613

Summary

o A vulnerability in the SIP inspection engine of Cisco Adaptive Security
Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software
could allow an unauthenticated, remote attacker to cause a crash and reload
of an affected device, resulting in a denial of service (DoS) condition.

The vulnerability is due to a crash that occurs during a hash lookup for a
SIP pinhole connection. An attacker could exploit this vulnerability by
sending crafted SIP traffic through an affected device. A successful
exploit could allow the attacker to cause a crash and reload of 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-asa-ftd-sipdos-GGwmMerC

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 Cisco products if they are running a vulnerable
release of Cisco ASA Software or FTD Software and have SIP inspection
configured.

For information about which Cisco software releases are vulnerable, see the
Fixed Software section of this advisory.

Determine the Device Configuration

To determine if SIP inspection is configured on Cisco ASA Software or FTD
Software, use the show service-policy | include sip command at the CLI. The
device is considered vulnerable if the output includes Inspect: sip , as
shown in this example:

device# show service-policy | include sip
Inspect: sip , packet 2, lock fail 0, drop 0, reset-drop 0, 5-min-pkt-rate 0 pkts/sec, v6-fail-close 0 sctp-drop-override 0

Note: SIP inspection is enabled by default on Cisco ASA Software and FTD
Software. For detailed information about the default settings for
application inspection policies, see the Cisco ASA Series Firewall CLI
Configuration Guide .

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 Firepower
Management Center (FMC) Software.

Workarounds

o There are no workarounds that address this vulnerability. However, there
are mitigation options that apply to both physical and virtual appliances.

Option 1: Disable SIP Inspection

Disabling SIP inspection will completely close the attack vector for this
vulnerability. However, this mitigation may not be suitable for all
customers. In particular, disabling SIP inspection would break SIP
connections if either Network Address Translation (NAT) is applied to SIP
traffic or if any ports that are required for SIP communication are not
opened through ACL.

To disable SIP inspection in Cisco ASA Software, use the following command:

policy-map <policy name>
class inspection_default
no inspect sip

To disable SIP inspection in Cisco FTD Software, use the following command
in the CLI:

configure inspection sip disable

Option 2: Allow Only Trusted SIP Hosts Using ACLs

Use ACLs to limit SIP connection through the device to known, trusted SIP
hosts. For information on Cisco ASA and FTD ACL configuration, see Cisco
ASA Series Firewall CLI Configuration Guide: Access Control Lists .

While these mitigations 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 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.

ASA Software

Cisco ASA First Fixed Release First Fixed Release for All the
Software for This Vulnerabilities Described in the Bundle
Release Vulnerability of Advisories
Earlier than Not vulnerable. Migrate to a fixed release.
9.8 ^1
9.8 9.8.4.34 9.8.4.35
9.9 9.9.2.85 9.9.2.85
9.10 ^1 Migrate to a fixed Migrate to a fixed release.
release.
9.12 9.12.4.18 9.12.4.18
9.13 9.13.1.21 9.13.1.21
9.14 9.14.2.13 9.14.2.13
9.15 9.15.1.15 9.15.1.15

1. Cisco ASA Software releases 9.7 and earlier, as well as Release 9.10,
have reached end of software maintenance . Customers are advised to migrate
to a supported release that includes the fix for this vulnerability.

FTD Software

Cisco FTD First Fixed Release Recommended Release for All the
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 Migrate to a fixed Migrate to a fixed release.
release.
6.2.3 Migrate to a fixed Migrate to a fixed release.
release.
6.3.0 Migrate to a fixed Migrate to a fixed release.
release.
6.4.0 6.4.0.12 (May 2021) 6.4.0.12 (May 2021)
6.5.0 Migrate to a fixed Migrate to a fixed release.
release.
6.6.0 6.6.4 6.6.4 ^2
6.7.0 6.7.0.2 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 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: April 2021 Cisco ASA, FMC, and FTD Software Security
Advisory Bundled Publication

URL

o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-sipdos-GGwmMerC

Revision History

o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-APR-28 |
+----------+---------------------------+----------+--------+--------------+

- --------------------------------------------------------------------------------

Cisco Adaptive Security Appliance Software and Firepower Threat Defense
Software Command Injection Vulnerability

Priority: Medium
Advisory ID: cisco-sa-asa-ftd-cmd-inj-SELprvG
First Published: 2021 April 28 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvx05381
CVE Names: CVE-2021-1476
CWEs: CWE-78

Summary

o A vulnerability in the CLI of Cisco Adaptive Security Appliance (ASA)
Software and Cisco Firepower Threat Defense (FTD) Software could allow an
authenticated, local attacker to execute arbitrary commands on the
underlying operating system (OS) of an affected device.

The vulnerability is due to insufficient input validation of commands that
are supplied by the user. An attacker could exploit this vulnerability by
authenticating to a device and submitting crafted input for specific
commands. A successful exploit could allow the attacker to execute commands
on the underlying OS with root privileges. To exploit this vulnerability,
an attacker must have valid administrator-level credentials.

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-asa-ftd-cmd-inj-SELprvG

Affected Products

o Vulnerable Products

At the time of publication, this vulnerability affected the following Cisco
products:

ASA Software releases 9.13 through the first fixed release
FTD Software releases 6.5 through the first fixed release

For information about which Cisco software releases are vulnerable, 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 Firepower
Management Center (FMC) Software.

Details

o Cisco FTD Software has two modes of deployment: native mode and
multi-instance (MI) mode.

In native mode, administrators always have access to the underlying root
shell (called Expert Mode). Therefore, this vulnerability does not affect
Cisco FTD Software deployments that are in native mode.

In MI mode, Expert Mode must be manually configured. Therefore, a malicious
administrator who has not been granted access to the underlying root shell
could exploit this vulnerability to bypass that restriction.

For Cisco ASA Software, there is no legitimate way to access the underlying
root shell. Therefore, all Cisco ASA Software deployments are affected by
this vulnerability.

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.

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.

ASA Software

Cisco ASA Software Release First Fixed Release for This Vulnerability
Earlier than 9.13 ^1 Not vulnerable.
9.13 9.13.1.21
9.14 9.14.2.13
9.15 9.15.1.10

FTD Software

Cisco FTD Software Release First Fixed Release for This Vulnerability
Earlier than 6.5 ^1 Not vulnerable.
6.5.0 Migrate to a fixed release.
6.6.0 6.6.4 ^2
6.7.0 6.7.0.2

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:

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

URL

o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-cmd-inj-SELprvG

Revision History

- --------------------------------------------------------------------------------

Cisco Adaptive Security Appliance Software and Firepower Threat Defense
Software Web Services Buffer Overflow Denial of Service Vulnerability

Priority: High
Advisory ID: cisco-sa-memc-dos-fncTyYKG
First Published: 2021 April 28 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvw52609
CVE Names: CVE-2021-1493
CWEs: CWE-120

Summary

o A vulnerability in the web services interface of Cisco Adaptive Security
Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software
could allow an authenticated, remote attacker to cause a buffer overflow on
an affected system.

The vulnerability is due to insufficient boundary checks for specific data
that is provided to the web services interface of an affected system. An
attacker could exploit this vulnerability by sending a malicious HTTP
request. A successful exploit could allow the attacker to cause a buffer
overflow condition on the affected system, which could disclose data
fragments or cause the device to reload, resulting in a denial of service
(DoS) condition.

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-memc-dos-fncTyYKG

Affected Products

o Vulnerable Products

This vulnerability affects Cisco products if they are running a vulnerable
release of Cisco ASA Software or FTD Software and have a vulnerable
AnyConnect VPN or WebVPN configuration.

For information about which Cisco software releases are vulnerable, see the
Fixed Software section of this advisory.

Vulnerable Configurations in Cisco ASA Software

In the following table, the left column lists the Cisco ASA Software
features that are affected by this vulnerability. The right column
indicates the basic configuration for the feature from the show
running-config CLI command. If the device is configured for one of these
features, it is considered vulnerable.

Cisco ASA Vulnerable Configuration
Software
Feature
AnyConnect
IKEv2
Remote crypto ikev2 enable <interface_name> client-services port <port #>
Access
(with
client
services)
AnyConnect webvpn
SSL VPN enable <interface_name>

Clientless webvpn
SSL VPN enable <interface_name>

Vulnerable Configurations in Cisco FTD Software

In the following table, the left column lists the Cisco FTD Software
features that are affected by this vulnerability. The right column
indicates the basic configuration for the feature from the show
running-config CLI command. If the device is configured for one of these
features, it is considered vulnerable.

Cisco FTD Vulnerable Configuration
Software
Feature
AnyConnect
IKEv2
Remote
Access crypto ikev2 enable <interface_name> client-services port <port #>
(with
client
services)
^1,2
AnyConnect webvpn
SSL VPN ^ enable <interface_name>
1,2

1.Remote Access VPN features are enabled through Devices > VPN > Remote
Access in Cisco Firepower Management Center (FMC) or through Device >
Remote Access VPN in Cisco Firepower Device Manager (FDM).

2. Remote Access VPN features were first supported in Cisco FTD Software
Release 6.2.2.

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 Firepower
Management Center (FMC) Software.

Workarounds

o There are no workarounds that address this vulnerability.

Fixed Software

Customers Without Service Contracts

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

ASA Software

Cisco ASA First Fixed Release First 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.
9.8 ^1
9.8 9.8.4.34 9.8.4.35
9.9 9.9.2.85 9.9.2.85
9.10 ^1 Migrate to a fixed Migrate to a fixed release.
release.
9.12 9.12.4.13 9.12.4.18
9.13 9.13.1.21 9.13.1.21
9.14 9.14.2.8 9.14.2.13
9.15 9.15.1.7 9.15.1.15

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 Migrate to a fixed Migrate to a fixed release.
6.2.2 ^1 release.
6.2.2 Migrate to a fixed Migrate to a fixed release.
release.
6.2.3 Migrate to a fixed Migrate to a fixed release.
release.
6.3.0 Migrate to a fixed Migrate to a fixed release.
release.
6.4.0 6.4.0.12 (May 2021) 6.4.0.12 (May 2021)
6.5.0 Migrate to a fixed Migrate to a fixed release.
release.
6.6.0 6.6.3 ^2 6.6.4 ^2
6.7.0 6.7.0.1 6.7.0.2

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:

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 Joshua Perez and Phil Purviance for reporting
this vulnerability.

Cisco Security Vulnerability Policy

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-memc-dos-fncTyYKG

Revision History

- --------------------------------------------------------------------------------

Cisco Adaptive Security Appliance Software and Firepower Threat Defense
Software Web Services VPN Denial of Service Vulnerabilities

Priority: High
Advisory ID: cisco-sa-asa-ftd-vpn-dos-fpBcpEcD
First Published: 2021 April 28 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvv56644 CSCvv65184
CVE Names: CVE-2021-1445 CVE-2021-1504
CWEs: CWE-787

Summary

o Multiple vulnerabilities in Cisco Adaptive Security Appliance (ASA)
Software and Firepower Threat Defense (FTD) Software could allow an
unauthenticated, remote attacker to cause a denial of service (DoS)
condition on an affected device.

These vulnerabilities are due to lack of proper input validation of the
HTTPS request. An attacker could exploit these vulnerabilities by sending a
crafted HTTPS request to an affected device. A successful exploit could
allow the attacker to cause the affected device to reload, resulting in a
DoS condition.

Note : This vulnerability affects only specific AnyConnect and WebVPN
configurations. For more information, see the Vulnerable Products section.

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-asa-ftd-vpn-dos-fpBcpEcD

Affected Products

o Vulnerable Products

These vulnerabilities affect Cisco devices if they are running a vulnerable
release of Cisco ASA Software or Cisco FTD Software and are configured for
termination of AnyConnect VPN Client connections.

For information about which Cisco software releases are vulnerable, see the
Fixed Software section of this advisory.

ASA Software

In the following table, the left column lists the Cisco ASA features that
are vulnerable. The right column indicates the basic configuration for the
feature from the show running-config CLI command. If the device is
configured for one of these features, it is vulnerable.

Cisco ASA Vulnerable Configuration
Feature
AnyConnect
IKEv2
Remote crypto ikev2 enable <interface_name> client-services port <port #>
Access
(with
client
services)
AnyConnect webvpn
SSL VPN enable <interface_name>

FTD Software

In the following table, the left column lists the Cisco FTD features that
are vulnerable. The right column indicates the basic configuration for the
feature from the show running-config CLI command. If the device is
configured for one of these features, it is vulnerable.

Cisco FTD Vulnerable Configuration
Feature
AnyConnect
IKEv2
Remote
Access crypto ikev2 enable <interface_name> client-services port <port #>
(with
client
services)
^1,2
AnyConnect webvpn
SSL VPN ^ enable <interface_name>
1,2

1. Remote Access VPN features are enabled through Devices > VPN > Remote
Access in the Cisco Firepower Management Center (FMC) or through Device >
Remote Access VPN in Cisco Firepower Device Manager (FDM).
2. Remote Access VPN features were first supported as of Cisco FTD Software
Release 6.2.2.

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
Firepower Management Center (FMC) Software and web browser-based VPN
connections.

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

Customers Without Service Contracts

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 second and third columns indicate whether a release is affected by the
vulnerabilities described in this advisory and the first release that
includes the fix for each vulnerability. The right column indicates whether
a release is affected by any of the vulnerabilities described in the
collection of advisories and which release includes fixes for those
vulnerabilities.

Cisco ASA Software

Cisco ASA CVE-2021-1445 CVE-2021-1504 Fixed Release for all
Software (CSCvv56644) (CSCvv65184) Vulnerabilities Described in the
Release Bundle of Advisories
Earlier than Not Not Migrate to a fixed release.
9.7 ^1 vulnerable vulnerable
Migrate to a Migrate to a
9.7 ^1 fixed fixed Migrate to a fixed release.
release. release.
9.8 9.8.4.34 9.8.4.35 9.8.4.35
9.9 9.9.2.85 9.9.2.85 9.9.2.85
Migrate to a Migrate to a
9.10 fixed fixed Migrate to a fixed release.
release. release.
9.12 9.12.4.13 9.12.4.10 9.12.4.18
9.13 9.13.1.21 9.13.1.21 9.13.1.21
9.14 9.14.2.8 9.14.2.4 9.14.2.13
9.15 9.15.1.7 9.15.1.7 9.15.1.15

Cisco FTD Software

Cisco FTD CVE-2021-1445 CVE-2021-1504 Recommended Release for All the
Software (CSCvv56644) (CSCvv65184) Vulnerabilities Described in the
Release Bundle of Advisories
Earlier Migrate to a Migrate to a
than 6.2.2 fixed fixed Migrate to a fixed release.
^1 release. release.
Migrate to a Migrate to a
6.2.2 fixed fixed Migrate to a fixed release.
release. release.
Migrate to a Migrate to a
6.2.3 fixed fixed Migrate to a fixed release.
release. release.
Migrate to a Migrate to a
6.3.0 fixed fixed Migrate to a fixed release.
release. release.
6.4.0 6.4.0.12 (May 6.4.0.12 (May 6.4.0.12 (May 2021)
2021) 2021)
Migrate to a Migrate to a
6.5.0 fixed fixed Migrate to a fixed release
release. release.
6.6.0 6.6.4 6.6.4 6.6.4 ^2
6.7.0 6.7.0.1 6.7.0.1 6.7.0.2

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:

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 vulnerabilities that are
described in this advisory.

Source

o Cisco would like to thank Nikita Abramov of PT Security for reporting these
vulnerabilities.

Cisco Security Vulnerability Policy

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-asa-ftd-vpn-dos-fpBcpEcD

Revision History

- --------------------------------------------------------------------------------

Cisco Adaptive Security Appliance Software and Firepower Threat Defense
Software for Firepower 1000 and 2100 Series Appliances Command Injection
Vulnerability

Priority: Medium
Advisory ID: cisco-sa-asa-cmdinj-TKyQfDcU
First Published: 2021 April 28 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvw93139
CVE Names: CVE-2021-1488
CWEs: CWE-77

Summary

o A vulnerability in the upgrade process of Cisco Adaptive Security Appliance
(ASA) Software and Cisco Firepower Threat Defense (FTD) Software could
allow an authenticated, local attacker to inject commands that could be
executed with root privileges on the underlying operating system (OS).

This vulnerability is due to insufficient input validation. An attacker
could exploit this vulnerability by uploading a crafted upgrade package
file to an affected device. A successful exploit could allow the attacker
to inject commands that could be executed with root privileges on the
underlying OS.

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-asa-cmdinj-TKyQfDcU

Affected Products

o Vulnerable Products

At the time of publication, this vulnerability affected the following Cisco
devices if they were running a vulnerable release of Cisco ASA Software or
FTD Software:

Firepower 1000 Series
Firepower 2100 Series

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 4100 Series
Firepower 9300 Series
Firepower Management Center (FMC) Software

Workarounds

o There are no workarounds that address this vulnerability.

Fixed Software

Fixed Releases

ASA Software

Cisco ASA Software Release First Fixed Release for This Vulnerability
Earlier than 9.6 ^1 Migrate to a fixed release.
9.6 ^1 Migrate to a fixed release.
9.7 ^1 Migrate to a fixed release.
9.8 Migrate to a fixed release.
9.9 Migrate to a fixed release.
9.10 ^1 Migrate to a fixed release.
9.12 Migrate to a fixed release.
9.13 9.13.1.21
9.14 9.14.2.13
9.15 9.15.1.10

FTD Software

Cisco FTD Software Release First Fixed Release for This Vulnerability
Earlier than 6.2.2 ^1 Migrate to a fixed release.
6.2.2 Migrate to a fixed release.
6.2.3 Migrate to a fixed release.
6.3.0 Migrate to a fixed release.
6.4.0 Migrate to a fixed release.
6.5.0 Migrate to a fixed release.
6.6.0 6.6.4 ^2
6.7.0 6.7.0.2

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:

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

URL

o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-cmdinj-TKyQfDcU

Revision History

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