-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
ICSA-13-045-01 - Tridium NiagaraAX Directory Traversal Vulnerability
22 February 2013
AusCERT Security Bulletin Summary
Product: Tridium NiagaraAX
Operating System: Windows
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
CVE Names: CVE-2012-4701
- --------------------------BEGIN INCLUDED TEXT--------------------
ICSA-13-045-01 - TRIDIUM NIAGARAAX DIRECTORY TRAVERSAL VULNERABILITY
February 14, 2013
This advisory provides mitigation details for a vulnerability in the Tridium
Independent researchers Billy Rios and Terry McCorkle discovered a directory
traversal vulnerability in the Tridium NiagaraAX software product. They
demonstrated that with a valid user account or guest privileges enabled,
privilege escalation is possible on a NiagaraAX system. Exploitation of this
vulnerability could allow loss of availability, integrity, and confidentiality
of the system.
Tridium has produced a patch that mitigates this vulnerability. This
vulnerability is remotely exploitable.
The following Tridium products are affected:
* Tridium NiagaraAX, [a] all versions.
A loss of integrity, data, and possibly physical damage can result if the
software is being used to control a physical process. Another consequence
might be the compromise of facility security where NiagaraAX is used for
facility access control and administration.
Impact to individual organizations depends on many factors that are unique to
each organization. ICS-CERT recommends that organizations evaluate the impact
of this vulnerability based on their operational environment, architecture,
and product implementation.
Tridium is a US-based company that maintains offices in several countries
around the world, including the US, UK, Singapore, and China. Tridium also
deploys systems to Latin America.
NiagaraAX is a general framework that can be used to integrate and manage
diverse industrial control system components, e.g., HVAC, building automation
controls, and facility management that can be controlled over the Internet
from a Web browser. According to Tridium, more than 350,000 instances of the
NiagaraAX Framework are used worldwide.
Tridium estimates that these products are used primarily in the commercial
facilities (88 percent), energy (5 percent), education (5 percent), and
government facilities and other sectors (2 percent).
PATH TRAVERSAL [b]
If an installed NiagaraAX instance has its Web interface accessible from the
Internet, and the user has valid user credentials, or if the system's
guest user function is enabled, the application could be subverted to escalate
the user's credentials and gain control of the system. The attacker could
read the contents of unexpected files, expose sensitive data, execute
arbitrary code, and affect the availability by sending a specially crafted
packet to the Web server on Port 80/TCP.
CVE-2012-4701 [c] has been assigned to this vulnerability. A CVSS v2 base
score of 8.5 has been assigned; the CVSS vector string is
(AV:N/AC:M/Au:S/C:C/I:C/A:C). [d] If the guest user function is enabled, no
authentication is required to exploit this vulnerability.
This vulnerability can be exploited remotely.
EXISTENCE OF EXPLOIT
No known public exploits specifically target this vulnerability.
An attacker with medium skill may be able to exploit this vulnerability.
Tridium has developed patches for all current versions (Versions 3.5, 3.6, and
3.7) of the NiagaraAX software. Links to the patches, along with instructions
on their use, can be obtained from the Tridium Security Update Web page:
For users of older versions of NiagaraAX software (prior to Version 3.5),
Tridium recommends that users either upgrade to the newest version or take
careful measures to isolate access to the Web interface from the Internet.
Users are encouraged to contact Tridium for details on disabling the Web
interface and for information on how to get to the most current version of
* ICS-CERT encourages asset owners to take additional defensive measures to
protect against this and other cybersecurity risks.
* Minimize network exposure for all control system devices. Critical devices
should not directly face the Internet.
* Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
* When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing that VPN is only as secure as the connected
ICS-CERT also provides a section for control systems security recommended
practices on the US-CERT Web page. Several recommended practices are available
for reading and download, including Improving Industrial Control Systems
Cybersecurity with Defense-in-Depth Strategies. [e] ICS-CERT reminds
organizations to perform proper impact analysis and risk assessment prior to
taking defensive measures.
Additional mitigation guidance and recommended practices are publicly
available in the ICS-CERT Technical Information Paper, ICS-TIP-12-146-01B -
2014Targeted Cyber Intrusion Detection and Mitigation Strategies, [f] that is
available for download from the ICS-CERT Web page (www.ics-cert.org).
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to ICS-CERT for
tracking and correlation against other incidents.
For any questions related to this report, please contact ICS-CERT at:
Toll Free: 1-877-776-7585
For industrial control systems security information and incident reporting:
[a] Tridium NiagaraAX - http://www.tridium.com/cs/products_/_services/niagaraax
last visited February 14, 2013.
[b] CWE-22, http://cwe.mitre.org/data/definitions/22.html, CWE-22: Path
Traversal, Web site last accessed February 14, 2013.
[c] NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-4701 , NIST
uses this advisory to create the CVE Web site report. This Web site will
be active sometime after publication of this advisory.
[d] CVSS Calculator, http://nvd.nist.gov/cvss.cfm?version=2&vector=(AV:N/AC:M/Au:S/C:C/I:C/A:C)
Web site last visited February 14, 2013.
[e] CSSP Recommended Practices, http://www.us-cert.gov/control_systems/practices/Recommended_Practices.html
Web site last accessed February 14, 2013.
[f] Targeted Cyber Intrusion Detection and Mitigation Strategies,
http://www.us-cert.gov/control_systems/pdf/ICS- TIP-12-146-01B.pdf, Web
site last accessed February 14, 2013.
- --------------------------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 email@example.com
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
Internet Email: firstname.lastname@example.org
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.
-----BEGIN PGP SIGNATURE-----
-----END PGP SIGNATURE-----