CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS
Percentile
87.1%
Martin Jartelius of Outpost24 has identified a directory traversal vulnerability in Honeywell’s XL Web Controller. Honeywell has produced an update that mitigates this vulnerability.
This vulnerability could be exploited remotely.
The following XLWeb controller versions are affected:
An attacker may use this vulnerability to generate a valid login for an administrative user on the Honeywell XLWeb controller giving the attacker full administrator access to the system. The XLWEB application effectively becomes an entry point into the network where it is located.
Impact to individual organizations depends on many factors that are unique to each organization. NCCIC/ICS-CERT recommends that organizations evaluate the impact of this vulnerability based on their operational environment, architecture, and product implementation.
Honeywell is a US-based company that maintains offices worldwide.
The affected products, XLWeb controllers, are web-based SCADA systems. According to Honeywell, XLWeb controllers are deployed across several sectors including Critical Manufacturing, Energy, Water and Wastewater Systems, and others. Honeywell estimates that these products are used primarily in Europe and the Middle East.
By using a directory traversal vulnerability in the FTP server, it is possible to gain access to the web root directory.
CVE-2015-0984NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0984, NIST uses this advisory to create the CVE web site report. This web site will be active sometime after publication of this advisory. has been assigned to this vulnerability. A CVSS v2 base score of 10.0 has been assigned; the CVSS vector string is (AV:N/AC:L/Au:N/C:C/I:C/A:C).CVSS Calculator, http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:C/I:C/A:C, web site last accessed March 17, 2015.
This vulnerability could be exploited remotely.
No known public exploits specifically target this vulnerability.
An attacker with a low skill would be able to exploit this vulnerability.
The update for this vulnerability is Excel Web Linux version 2.04.01 (March, 2014) or later plus the programing tool CARE version 10.02 (March 2014) or later. Customers are encouraged to contact their local Honeywell HBS branch to have their sites updated to the latest version.
In the Centraline partner channel, Excel Web controllers also have been sold under the brand name “FALCON.” Centraline partners can directly access <http://www.centraline.com> and get these versions.
Linux: https://www.centraline.com/index.php?id=847&route=article/index&directory_id=140&direct_link=1
CARE: https://www.centraline.com/index.php?id=847&route=article/index&directory_id=138&direct_link=1
ICS-CERT encourages asset owners to take additional defensive measures to protect against this and other cybersecurity risks.
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/).
www.centraline.com
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