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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.2379
                Cogent DataHub Code Injection Vulnerability
                             10 September 2015

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cogent DataHub
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-3789  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-15-246-01

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Advisory (ICSA-15-246-01)

Cogent DataHub Code Injection Vulnerability

Original release date: September 03, 2015

Legal Notice

All information products included in http://ics-cert.us-cert.gov are provided
"as is" for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this
product is governed by the Traffic Light Protocol (TLP) marking in the
header. For more information about TLP, see http://www.us-cert.gov/tlp/.

OVERVIEW

NCCIC/ICS-CERT has become aware of a code injection vulnerability affecting
the Cogent DataHub application produced by Cogent Real-Time Systems,
Inc. An anonymous security researcher reported this vulnerability to HP's
Zero Day Initiative (ZDI). A patch to mitigate this issue was released on
September 2, 2015.

This vulnerability could be exploited remotely.

AFFECTED PRODUCTS

The following Cogent DataHub versions are affected:

    Cogent DataHub, Version 7.3.8 and earlier.

IMPACT

Successful exploitation of this vulnerability could allow an attacker to
turn on an insecure processing mode in the web server, which subsequently
allows the attacker to send arbitrary script commands to the server. These
script commands can result in remote code execution, denial of service,
and information disclosure.

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.

BACKGROUND

Cogent is a Canadian-based company that produces middleware applications
that are used to interface with control systems.

The Cogent DataHub product is a real-time middleware solution and is deployed
across several sectors including Chemical, Commercial Facilities, Critical
Manufacturing, Energy, Financial Services, and others. These products are
used worldwide, but primarily in the United States and Great Britain.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

CODE INJECTION[a]

If an attacker sends a request to any Gamma script file that uses a
certain class, it can then turn on an insecure processing mode in the web
server. The specific flaw exists because of an insecure processing mode
in the ajax pseudo-URL handler within the Cogent DataHub web server.

CVE-2014-3789[b] has been assigned to this vulnerability. ZDI has
calculated a CVSS v2 base score of 7.5; the CVSS vector string is
(AV:N/AC:L/Au:N/C:P/I:P/A:P).[c]

VULNERABILITY DETAILS

EXPLOITABILITY

This vulnerability could be exploited remotely.

EXISTENCE OF EXPLOIT

No known public exploits specifically target this vulnerability.

DIFFICULTY

An attacker with a low skill would be able to exploit this vulnerability.

MITIGATION

Cogent has fixed this vulnerability in Version 7.3.9 of DataHub. This is a
free upgrade for any customer running V7.x. Cogent advises that customers
running versions prior to Version 7.3.9 do one of the following:

    Upgrade to Cogent DataHub Version 7.3.9 from:
    http://www.cogentdatahub.com/Download_Software.html, or
    Disable the web server component in the Cogent DataHub installation, or
    Configure network security to block access to the Cogent DataHub web
    server from untrusted locations, or
    Delete the file: C:\Program files (x86)\Cogent\Cogent
    DataHub\require\AJAXSupport.g and then re-start the Cogent DataHub
    process.

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 and/or systems,
    and ensure that they are not accessible from 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 VPNs may have vulnerabilities
    and should be updated to the most current version available. Also
    recognize that VPN is only as secure as the connected devices.

ICS-CERT also provides a section for control systems
security recommended practices on the ICS-CERT web page at:
http://ics-cert.us-cert.gov/content/recommended-practices. Several
recommended practices are available for reading and download, including
Improving Industrial Control Systems Cybersecurity with Defense-in-Depth
Strategies. ICS-CERT reminds organizations to perform proper impact analysis
and risk assessment prior to deploying defensive measures.

Additional mitigation guidance and recommended practices are
publicly available in the ICS-CERT Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies, that is available for download from the ICS-CERT web site
(http://ics-cert.us-cert.gov/).

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.

    a.
    CWE-94: Improper Control of Generation of Code ("Code Injection"),
    http://cwe.mitre.org/data/definitions/94.html, web site last accessed
    September 03, 2015.
    b.
    NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-3789,
    web site last accessed September 03, 2015.
    c.
    CVSS Calculator,
    http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:P/I:P/A:P,
    web site last accessed September 03, 2015.


Contact Information

For any questions related to this report, please contact ICS-CERT at:

Email: ics-cert@hq.dhs.gov
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900

For industrial control systems security information and incident reporting:
http://ics-cert.us-cert.gov

ICS-CERT continuously strives to improve its products and services. You
can help by choosing one of the links below to provide feedback about
this product.

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