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AUSCERT External Security Bulletin Redistribution
ESB-2019.3712.2
Cisco FTD, FMC, and FXOS Software Pluggable Authentication
Module Denial of Service Vulnerability
10 October 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco FTD, FMC, and FXOS Software Pluggable Authentication Module
Publisher: Cisco Systems
Operating System: Network Appliance
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-12700
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-ftd-fpmc-dos
Revision History: October 10 2019: Updated first fixed release for FXOS 2.2 and earlier.
October 3 2019: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco FTD, FMC, and FXOS Software Pluggable Authentication Module Denial of
Service Vulnerability
Priority: High
Advisory ID: cisco-sa-20191002-ftd-fpmc-dos
First Published: 2019 October 2 16:00 GMT
Last Updated: 2019 October 9 14:08 GMT
Version 1.1: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvm92401CSCvn83385
CVE-2019-12700
CWE-400
CVSS Score:
7.7 AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X
Summary
o A vulnerability in the configuration of the Pluggable Authentication Module
(PAM) used in Cisco Firepower Threat Defense (FTD) Software, Cisco
Firepower Management Center (FMC) Software, and Cisco FXOS Software could
allow an authenticated, remote attacker to cause a denial of service (DoS)
condition.
The vulnerability is due to improper resource management in the context of
user session management. An attacker could exploit this vulnerability by
connecting to an affected system and performing many simultaneous
successful Secure Shell (SSH) logins. A successful exploit could allow the
attacker to exhaust system resources and cause the device to reload,
resulting in a DoS condition. To exploit this vulnerability, the attacker
needs valid user credentials on the system.
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-20191002-ftd-fpmc-dos
Affected Products
o Vulnerable Products
This vulnerability affects Cisco FTD Software, FMC Software, and FXOS
Software running on any Cisco product.
For information about which Cisco FTD Software, FMC Software, and FXOS
Software releases are vulnerable, see the Fixed Software section 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 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
Customers are advised to upgrade to an appropriate release as indicated in
the applicable table in this section.
In the following tables, the left column lists releases of Cisco FTD
Software, FMC Software, or FXOS 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 FTD Software and FMC Software
Cisco FTD Software and FMC Software Running on Firepower 1000/2100 Series
Cisco FTD/FMC Software Release (Firepower First Fixed Release for This
1000/2100 Series) Vulnerability
6.1.0 and earlier 6.2.3.14
6.2.0 6.2.3.14
6.2.1 6.2.3.14
6.2.2 6.2.3.14
6.2.3 6.2.3.14
6.3.0 Not vulnerable
6.4.0 Not vulnerable
6.5.0 Not vulnerable
Cisco FTD Software and FMC Software Running on Any Other Platform
Cisco FTD/FMC Software Release (Other First Fixed Release for This
Platforms) Vulnerability
6.1.0 and earlier 6.2.2.5
6.2.0 6.2.2.5
6.2.1 6.2.2.5
6.2.2 6.2.2.5
6.2.3 6.2.3.7
6.3.0 Not vulnerable
6.4.0 Not vulnerable
6.5.0 Not vulnerable
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.
Cisco FXOS Software
Cisco FXOS Software Release First Fixed Release for This Vulnerability
2.2 and earlier 2.2.2.101
2.3 2.3.1.155
2.4 2.6.1.131
2.6 2.6.1.131
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.
Action Links for This Advisory
o Snort Rule 19559
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20191002-ftd-fpmc-dos
Revision History
o +---------+-------------------------+----------+--------+-----------------+
| Version | Description | Section | Status | Date |
+---------+-------------------------+----------+--------+-----------------+
| | Updated first fixed | Fixed | | |
| 1.1 | release for FXOS 2.2 | Software | Final | 2019-October-09 |
| | and earlier. | | | |
+---------+-------------------------+----------+--------+-----------------+
| 1.0 | Initial public release. | - | Final | 2019-October-02 |
+---------+-------------------------+----------+--------+-----------------+
- --------------------------END INCLUDED TEXT--------------------
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