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AUSCERT External Security Bulletin Redistribution
ESB-2015.2670
IniNet Solutions SCADA Web Server Vulnerabilities
22 October 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: IniNet Solutions GmbH's SCADA Web Server
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Modify Arbitrary Files -- Remote/Unauthenticated
Delete Arbitrary Files -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-1003 CVE-2015-1002 CVE-2015-1001
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-15-293-02
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Advisory (ICSA-15-293-02)
IniNet Solutions SCADA Web Server Vulnerabilities
Original release date: October 20, 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
Kirill Nesterov and Aleksandr Timorin of Positive Technologies have
identified three vulnerabilities in IniNet Solutions GmbH's SCADA Web
Server. IniNet Solutions GmbH has produced a new version that mitigates
these vulnerabilities.
These vulnerabilities could be exploited remotely.
AFFECTED PRODUCTS
The following SCADA Web Server versions are affected:
IniNet Solutions GmbH's SCADA Web Server, versions prior to Version
2.02.
IniNet Solutions GmbH's SCADA Web Server is a third-party software that
is used in industrial control system devices. NCCIC/ICS-CERT is working
with vendors to identify affected products that incorporate vulnerable
versions of SCADA Web Server. ICS-CERT will update the advisory with
additional affected products as more information becomes available.
The IniNet Solutions GmbH's SCADA Web Server is known to be compatible
and used with the following Beckhoff products:
Beckhoff Embedded PC, series CX1010,
Beckhoff Embedded PC, series CX1020,
Beckhoff Embedded PC, series CX1030,
Beckhoff Embedded PC, series CX2000,
Beckhoff Embedded PC, series CX5100, and
Beckhoff Embedded PC, series CX5000.
IMPACT
Successful exploitation of the vulnerabilities in SCADA Web Server could
allow an attacker to manipulate and delete files, execute arbitrary code,
and initiate a denial of service condition.
Impact to individual organizations depends on many factors that are unique
to each organization. ICS-CERT recommends that organizations evaluate the
impact of these vulnerabilities based on their operational environment,
architecture, and product implementation.
BACKGROUND
IniNet Solutions GmbH is a Switzerland-based company.
The affected product, SCADA Web Server, is a third-party web-based server
software. According to IniNet Solutions GmbH, SCADA Web Server is deployed
across several industries including building automation. IniNet Solutions
GmbH estimates that this product is primarily used in Europe.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
STACK-BASED BUFFER OVERFLOW[a]
Multiple HTTP request fields are parsed by a function that does not check
destination buffer size, which could allow an attacker to overflow the
buffer that may allow remote code execution or a denial-of-service condition.
CVE-2015-1001[b] has been assigned to this vulnerability. A CVSS
v3 base score of 9.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).[c]
IMPROPER HANDLING OF URL ENCODING (HEX ENCODING)[d]
Security features could be evaded when input has been URL encoded that
could allow unauthorized file manipulation and deletion.
CVE-2015-1002[e] has been assigned to this vulnerability. A CVSS
v3 base score of 9.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).[f]
PATH TRAVERSAL[g]
External input is used to construct paths to files and directories without
properly neutralizing special elements within the pathname that could
allow an attacker to read arbitrary OS files.
CVE-2015-1003[h] has been assigned to this vulnerability. A CVSS
v3 base score of 7.5 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).[i]
VULNERABILITY DETAILS
EXPLOITABILITY
These vulnerabilities could be exploited remotely.
EXISTENCE OF EXPLOIT
No known public exploits specifically target these vulnerabilities.
DIFFICULTY
An attacker with low skill would be able to exploit these vulnerabilities.
MITIGATION
IniNet Solutions GmbH has produced a new version of SCADA Web Server, Version
2.02 that mitigates the identified vulnerabilities. The new version can
be obtained by contacting IniNet Solutions GmbH. IniNet Solutions GmbH's
contact information is available at the following URL:
http://spidercontrol.net/contact/?L=1.
RECOMMENDATIONS FOR ASSET OWNERS WITH AFFECTED BECKHOFF PRODUCTS
Asset owners of an identified Beckhoff product should determine if a
vulnerable version of SCADA Web Server is in use. Asset owners using a
vulnerable version of SCADA Web Server should contact their supplier or
IniNet Solutions to obtain a new version of SCADA Web Server. Beckhoff has
stated that IniNet Solutions products are not a Beckhoff product. SCADA
Web Server is an application software by a third-party vendor developed
and sold independent of Beckhoff. Beckhoff asserts that their (standard)
products are not affected.
ICS-CERT encourages asset owners to take additional defensive measures to
protect against this and other cybersecurity risks.
Isolate vulnerable systems from the Internet and untrusted systems;
however, if connectivity is required, use a VPN solution and implement
network monitoring, 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.
Implement a runtime policy to prevent the use of any command that does
not appear in a whitelist of allowable commands.
Utilize good design practices that include network segmentation; use
DMZs with properly configured firewalls to selectively control traffic;
and monitor traffic passed between zones and systems.
Maintain layered physical and logical security to implement
defense-in-depth design practices for ICS environments.
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.
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-121: Stack-based Buffer Overflow,
http://cwe.mitre.org/data/definitions/121.html, web site last accessed
October 20, 2015.
b.
NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-1001,
NIST uses this advisory to create the CVE web site report. This web
site will be active sometime after publication of this advisory.
c.
CVSS Calculator,
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S...,
web site last accessed October 20, 2015.
d.
CWE-177: Improper Handling of URL Encoding (Hex Encoding),
http://cwe.mitre.org/data/definitions/177.html, web site last accessed
October 20, 2015.
e.
NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-1002,
NIST uses this advisory to create the CVE web site report. This web
site will be active sometime after publication of this advisory.
f.
CVSS Calculator,
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S...,
web site last accessed October 20, 2015.
g.
CWE-22: Improper Limitation of a Pathname to a Restricted Directory
('Path Traversal'), http://cwe.mitre.org/data/definitions/22.html,
web site last accessed October 20, 2015.
h.
NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-1003,
NIST uses this advisory to create the CVE web site report. This web
site will be active sometime after publication of this advisory.
i.
CVSS Calculator,
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S...,
web site last accessed October 20, 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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