ESB-2018.1816 - [Cisco] Cisco Firepower 4100 Series and Firepower 9300: Modify arbitrary files - Existing account 2018-06-21

Printable version
PGP/GPG verifiable version

Hash: SHA256

             AUSCERT External Security Bulletin Redistribution

  Cisco Firepower 4100 Series Next-Generation Firewall and Firepower 9300
              Security Appliance Path Traversal Vulnerability
                               21 June 2018


        AusCERT Security Bulletin Summary

Product:           Cisco Firepower 4100 Series
                   Cisco Firepower 9300
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Modify Arbitrary Files -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0300  

Original Bulletin:

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

Cisco Security Advisory: Cisco Firepower 4100 Series Next-Generation Firewall
and Firepower 9300 Security Appliance Path Traversal Vulnerability

Advisory ID: cisco-sa-20180620-firepwr-pt

Revision: 1.0

For Public Release: 2018 June 20 16:00 GMT

Last Updated: 2018 June 20 16:00 GMT

CVE ID(s): CVE-2018-0300

CVSS Score v(3): 7.2 CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H




A vulnerability in the process of uploading new application images to the 
Cisco Firepower 4100 Series Next-Generation Firewall (NGFW) and Firepower 9300
Security Appliance could allow an authenticated, remote attacker using path 
traversal techniques to create or overwrite arbitrary files on an affected 

The vulnerability is due to insufficient validation during the application 
image upload process. An attacker could exploit this vulnerability by creating
an application image containing malicious code and installing the image on the
affected device using the CLI or web-based user interface (web UI). These 
actions occur prior to signature verification and could allow the attacker to
create and execute arbitrary code with root privileges.

Note: A missing or invalid signature in the application image will cause the 
upload process to fail, but does not prevent the exploit.

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:

This advisory is part of the June 2018 Cisco FXOS and NX-OS Software Security
Advisory Collection, which includes 24 Cisco Security Advisories that describe
24 vulnerabilities. For a complete list of the advisories and links to them, 
see Cisco Event Response: June 2018 Cisco FXOS and NX-OS Software Security

- --------------------------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
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:

Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

Internet Email:
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.


« Back to bulletins