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AUSCERT External Security Bulletin Redistribution
ESB-2017.2113
Advisory (ICSA-17-234-01) Automated Logic Corporation
WebCTRL, i-VU, SiteScan
23 August 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: Automated Logic Corporation WebCTRL, i-VU, SiteScan
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-9650 CVE-2017-9644 CVE-2017-9640
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-17-234-01
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Advisory (ICSA-17-234-01)
Automated Logic Corporation WebCTRL, i-VU, SiteScan
Original release date: August 22, 2017
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/.
CVSS v3 8.3
ATTENTION: Remotely exploitable/low skill level to exploit.
Vendor: Automated Logic Corporation (ALC)
Equipment: WebCTRL, i-VU, SiteScan
Vulnerabilities: Unquoted Search Path or Element; Improper Limitation of a
Pathname to a Restricted Directory ('Path Traversal'); Unrestricted Upload of
File with Dangerous Type
AFFECTED PRODUCTS
The following versions of WebCTRL, i-Vu, SiteScan Web, building automation
platforms, are affected:
ALC WebCTRL, i-Vu, SiteScan Web 6.5 and prior,
ALC WebCTRL, SiteScan Web 6.1 and prior,
ALC WebCTRL, i-Vu 6.0 and prior,
ALC WebCTRL, i-Vu, SiteScan Web 5.5 and prior, and
ALC WebCTRL, i-Vu, SiteScan Web 5.2 and prior.
IMPACT
Successful exploitation of these vulnerabilities could allow an authenticated
user to elevate his or her privileges to execute arbitrary code on the system.
MITIGATION
ALC provides support for WebCTRL, i-Vu, SiteScan Web versions 6.0 and greater.
Those users using prior versions, including 5.5 and 5.2, must upgrade to
supported versions in order to install these mitigation patches.
ALC applications should always be installed and maintained in accordance with
the guidelines found here:
http://www.automatedlogic.com/Pages/Security.aspx (link is external).
In addition ALC has released the following patches, which address these
vulnerabilities:
WebCTRL 6.0, Cumulative Patch #13
WebCTRL 6.1, Cumulative Patch #7
WebCTRL 6.5, Cumulative Patch #7 + WS65_Security_Update2.update
These patch releases may be obtained on the ALC accounts web site or calling
Technical Support at 770-429-3002
i-Vu 6.0, Cumulative Patch #13
i-Vu 6.5, Cumulative Patch #7 + WS65_Security_Update2.update
The patch release may be obtained by calling Technical Support at 800-277-9852
SiteScan Web Version 6.1, Cumulative Patch #7, and
SiteScan Web Version 6.5, Cumulative Patch #7 + WS65_Security_Update2.update.
These patches may be obtained by contacting Liebert Services at
1-800-543-2378.
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the
risk of exploitation of these vulnerabilities. Specifically, users should:
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 reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
ICS-CERT also provides a section for control systems security recommended
practices on the ICS-CERT web page. Several recommended practices are
available for reading and download, including Improving Industrial Control
Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly
available in the ICSCERT 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.
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.
No known public exploits specifically target these vulnerabilities.
VULNERABILITY OVERVIEW
UNQUOTED SEARCH PATH OR ELEMENT CWE-428
An unquoted search path vulnerability may allow a non-privileged local
attacker to change files in the installation directory and execute arbitrary
code with elevated privileges.
CVE-2017-9644 has been assigned to this vulnerability. A CVSS v3 base score of
4.2 has been assigned; the CVSS vector string is
(AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L).
IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY ('PATH TRAVERSAL')
CWE-22
An authenticated attacker may be able to overwrite files that are used to
execute code. This vulnerability does not affect version 6.5 of the software.
CVE-2017-9640 has been assigned to this vulnerability. A CVSS v3 base score of
6.3 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).
UNRESTRICTED UPLOAD OF FILE WITH DANGEROUS TYPE CWE-434
An authenticated attacker may be able to upload a malicious file allowing the
execution of arbitrary code.
CVE-2017-9650 has been assigned to this vulnerability. A CVSS v3 base score of
8.3 has been assigned; the CVSS vector string is
(AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N).
RESEARCHER
Gjoko Krstic from Zero Science Lab identified the vulnerabilities.
BACKGROUND
Critical Infrastructure Sector: Commercial Facilities
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Kennesaw, Georgia
Contact Information
For any questions related to this report, please contact ICS-CERT at:
Email: ics-cert@hq.dhs.gov (link sends e-mail)
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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