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AUSCERT External Security Bulletin Redistribution
ESB-2019.0219
Multiple vulnerabilities have been identified in Cisco Firepower Management
24 January 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Firepower Threat Defense
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
Cross-site Scripting -- Remote with User Interaction
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1669 CVE-2019-1642
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-frpwr-mc-xss
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-firepowertds-bypass
Comment: This bulletin contains two (2) Cisco Systems security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Firepower Management Center Cross-Site Scripting Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20190123-frpwr-mc-xss
First Published: 2019 January 23 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvk30983
CVE-2019-1642
CWE-79
CVSS Score: Base 6.1
CVSS: 3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:X/RL:X/RC:X
Summary
o A vulnerability in the web-based management interface of Cisco Firepower
Management Center (FMC) software could allow an unauthenticated, remote
attacker to conduct a cross-site scripting (XSS) attack against a user of
the web-based management interface of the affected software.
The vulnerability is due to insufficient validation of user-supplied input
by the web-based management interface of the affected software. An attacker
could exploit this vulnerability by persuading a user of the interface to
click a crafted link. A successful exploit could allow the attacker to
execute arbitrary script code in the context of the affected interface or
access sensitive, browser-based information.
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-20190123-frpwr-mc-xss
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Firepower Management Center (FMC). For
information about affected software releases, consult the Cisco bug IDs at
the top of this advisory.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o For information about fixed software releases, consult the Cisco bug ID(s)
at the top of this advisory.
When considering software upgrades, customers are advised to regularly
consult the advisories for Cisco products, which are available from the
Cisco Security Advisories and Alerts 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.
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 Mr. Bhushan Patil from Mumbai, India for
reporting this vulnerability.
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.
Action Links for This Advisory
o Understanding Cross-Site Scripting (XSS) Threat Vectors
Related to This Advisory
o Cross-Site Scripting
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-frpwr-mc-xss
Revision History
+----------+---------------------------+----------+--------+------------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+------------------+
| 1.0 | Initial public release. | -- | Final | 2019-January-23 |
+----------+---------------------------+----------+--------+------------------+
Legal Disclaimer
o THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
- --------------------------------------------------------------------------------
Cisco Firepower Threat Defense Software Packet Inspection and Enforcement
Bypass Vulnerability
Priority: High
Advisory ID: cisco-sa-20190123-firepowertds-bypass
First Published: 2019 January 23 14:00 GMT
Version 1.0: Final
Workarounds: Yes
Cisco Bug IDs: CSCvo02577
CVE-2019-1669
CWE-693
CVSS Score: Base 8.6
CVSS: 3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N/E:X/RL:X/RC:X
CVE-2019-1669
CWE-693
Summary
o A vulnerability in the data acquisition (DAQ) component of Cisco Firepower
Threat Defense (FTD) Software could allow an unauthenticated, remote
attacker to bypass configured access control policies or cause a denial of
service (DoS) condition.
The vulnerability exists because the affected software improperly manages
system memory resources when inspecting traffic. An attacker could exploit
this vulnerability by generating specific traffic patterns for the software
to inspect. A successful exploit could allow the attacker to exhaust system
memory resources used for traffic inspection. Depending on the
configuration, the FTD Software could fail open and cease to inspect
traffic or fail closed and result in a DoS condition. This vulnerability
may require manual intervention to restore the software.
Cisco has released software updates that address this vulnerability. There
are workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-firepowertds-bypass
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Firepower Threat Defense Software Release
6.3.0 only when running on Firepower 4100 or Firepower 9300 Series
Platforms.
Determine a Vulnerable FTD Software Configuration
To verify whether the FTD Software has a vulnerable configuration,
administrators can check access control policies and general
configurations. To be considered vulnerable, the configuration must have
all of the following:
1. Access control rules that perform URL filtering or invoke file/malware
inspection
2. SSL hardware acceleration enabled (default setting)
3. Access control policy advanced settings that do not specify an
associated SSL policy to handle encrypted traffic (default setting)
Note: If the Snort Fail Open: Busy option under Inline Sets > Advanced is
enabled, exploit attempts can cause traffic to pass through without
inspection when the Snort process is busy. If the Busy option is not
enabled, exploit attempts can cause a DoS condition.
Determine the Cisco Firepower System Software Release
To determine which Cisco Firepower System Software release is running on a
device, administrators can log in to the device, use the show version
command in the CLI, and refer to the output of the command. The following
example shows the output of the command for a device that is running Cisco
Firepower System Software Release 6.3.0:
> show version
-------[ ftd.domain.com ]--------
Model : Cisco Firepower 4140 Threat Defense (76) Version 6.3.0 (Build 83)
UUID : 06870e8a-15a7-11e9-b733-a3ffca9e3696
Rules update version : 2019-01-14-001-vrt
VDB version : 299
----------------------------------------------------
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Indicators of Compromise
o Exploitation of this vulnerability can lead to a decrease in available
system memory. Administrators can issue the show blocks command; an
available block count in the CNT column that shows a continued decrease in
the memory blocks of size 9344 could indicate active exploitation.
# show blocks
SIZE MAX LOW CNT
0 2700 2693 2700
4 100 99 99
80 1196 1135 1196
256 4148 3953 4124
1550 6494 6405 6489
2048 100 100 100
2560 164 164 164
4096 100 100 100
8192 100 100 100
9344 48552 516 535
16384 100 100 100
65536 16 16 16
A depletion of the memory blocks of size 9344 could cause traffic
inspection to cease and may prevent network policies from being applied. If
these conditions are observed, customers are advised to contact the Cisco
Technical Assistance Center (TAC) to determine whether the device has been
compromised by exploitation of this vulnerability.
Workarounds
o Disabling SSL hardware acceleration, which is enabled by default in FTD
Software Release 6.3.0, mitigates this vulnerability when no SSL policy is
applied. Configurations with SSL policies enabled are not vulnerable.
Administrators can issue the system support ssl-hw-offload disable command
in the CLI to disable SSL hardware acceleration. This command will reboot
the device.
ftd# system support ssl-hw-offload disable
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 and Alerts 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, the left column lists releases of Cisco Firepower
System Software. The right 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.
Cisco Firepower System Software Release First Fixed Release
6.1.0 Not vulnerable
6.2.0 Not vulnerable
6.2.1 Not vulnerable
6.2.2 Not vulnerable
6.2.3 Not vulnerable
6.3.0^1 Affected; apply 6.3.0 Hotfix B
^16.3.0 Build 85 or later is not vulnerable.
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.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-firepowertds-bypass
Revision History
+----------+---------------------------+----------+--------+------------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+------------------+
| 1.0 | Initial public release. | -- | Final | 2019-January-23 |
+----------+---------------------------+----------+--------+------------------+
Legal Disclaimer
o THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
- --------------------------END INCLUDED TEXT--------------------
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