10 High
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
0.004 Low
EPSS
Percentile
75.1%
This advisory was originally posted to the US-CERT secure Portal library on September 22, 2015, and is being released to the NCCIC/ICS-CERT web site.
Mattijs van Ommeren of Applied Risk has identified several vulnerabilities in the Janitza UMG power quality measuring products. Janitza has produced new firmware and new documentation to mitigate these vulnerabilities.
These vulnerabilities could be exploited remotely.
Janitza reports that the vulnerabilities affect the following products:
An unauthenticated attacker can take full control of the device by leveraging the built-in script language. An attacker can adjust system parameters; manipulate measurement values and change the function of the device; and compromise availability, integrity, and confidentiality of the device and dependent systems.
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.
Janitza is a company based in Germany that sells its products through worldwide partners.
The UMG line of devices is energy and power quality measurement products. According to Janitza, UMG products are deployed in the Energy sector. Janitza estimates that these products are used primarily in Europe, the Americas, and Asia.
By default the UMG deviceโs web interface is unprotected. A password can be configured but is limited to a short PIN. No controls are in place to prevent PIN guessing, like locking after several invalid attempts.
CVE-2015-3972NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-3972, 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 v3 base score of 9.8 has been assigned; the CVSS vector string is (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, web site last accessed September 22, 2015.
Session tokens are derived from the 4-digit user PIN in combination with a server-generated challenge. An attacker may be able to crack the user PIN using a sample of session tokens.
CVE-2015-3973NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-3973, 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 v3 base score of 5.3 has been assigned; the CVSS vector string is (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, web site last accessed September 22, 2015.
The device exposes an FTP interface that is protected by an undocumented default password. Once logged in, an attacker is able to upload and download arbitrary files.
CVE-2015-3968NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-3968, 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 v3 base score of 9.8 has been assigned; the CVSS vector string is (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, web site last accessed September 22, 2015.
There is a remote debug interface on TCP Port 1239. This allows an unauthenticated remote attacker to read and write files and execute JASIC program code.
CVE-2015-3971NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-3971, 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 v3 base score of 9.1 has been assigned; the CVSS vector string is (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N, web site last accessed September 22, 2015.
The device does not properly filter user input. Several unauthenticated parts of the web interface are vulnerable to reflected cross-site-scripting (XSS). Some parameters are vulnerable to stored XSS after login.
CVE-2015-3970NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-3970, 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 v3 base score of 7.3 has been assigned; the CVSS vector string is (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L, web site last accessed September 22, 2015.
The deviceโs web interface does not provide protection against web requests originating from other sources than the current userโs authenticated browser session. Therefore, it is possible for an attacker to execute actions on behalf of an authenticated user while connected to an attacker controlled web site during an active session.
CVE-2015-3967NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-3967, 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 v3 base score of 7.3 has been assigned; the CVSS vector string is (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L, web site last accessed September 22, 2015.
A service running on Port 1234/UDP and Port 1235/UDP exposes netstat-like information, leaking current network connection information.
CVE-2015-3969NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-3969, 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 5.3 has been assigned; the CVSS vector string is (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, web site last accessed September 22, 2015.
These vulnerabilities could be exploited remotely.
Exploits that target these vulnerabilities are publicly available.
An attacker with low to moderate skills would be able to exploit these vulnerabilities.
Janitza has created new firmware to address these vulnerabilities. Users can download the new firmware at the following location:
<http://www.janitza.com/experimental-downloads.html>
Users may also download a manual telling how to secure a TCP/IP connection for UMG 604, UMG 605, UMG 508, UMG 509, UMG 511 and UMG 512 at the following location:
<http://www.janitza.com/download-manuals-current-devices.html>
ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
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 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.
Additional mitigation guidance and recommended practices are publicly available in the ICSโCERT Technical Information Paper, ICS-TIP-12-146-01BโTargeted 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.
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