SCADA Vulnerabilities & Exposures (SVE)

CRITIFENCE® SCADA Vulnerabilities and Exposures Database (SVE)

[SVE-831374376] Schneider Electric Magelis HMI Resource Consumption Vulnerabilities

Date Type Platform Author EDB-ID CVE-ID OSVDB-ID Download App SIS Signature
2016-11-03HMISchneider Electric Magelis Advanced HMI Panel (PanelShock)Eran GoldsteinN/ACVE-2016-8367, CVE-2016-8374N/AN/AN/A

Source

						
							
								
#
# Schneider Electric Magelis HMI Resource Consumption Vulnerabilities
#


### OVERVIEW

NCCIC/ICS-CERT is aware of a public report of resource consumption vulnerabilities affecting Schneider Electric's Magelis human-machine interface (HMI) products. The researcher Eran Goldstein, in collaboration with Check Point Software Technologies and CRITIFENCE, released vulnerability information after coordination with the vendor and ICS-CERT. Schneider Electric has validated the resource consumption vulnerabilities and is planning to release new versions to mitigate these vulnerabilities.

These vulnerabilities could be exploited remotely.

Detailed vulnerability information is publicly available that could be used to develop an exploit that targets these vulnerabilities.




### AFFECTED PRODUCTS

Schneider Electric reports that the vulnerabilities affect the following versions of Magelis HMI:

Magelis GTO Advanced Optimum Panels, all versions,
Magelis GTU Universal Panel, all versions,
Magelis STO5xx and STU Small panels, all versions,
Magelis XBT GH Advanced Hand-held Panels, all versions,
Magelis XBT GK Advanced Touchscreen Panels with Keyboard, all versions,
Magelis XBT GT Advanced Touchscreen Panels, all versions, and
Magelis XBT GTW Advanced Open Touchscreen Panels (Windows XPe).




### IMPACT

Successful exploitation of these vulnerabilities could result in a denial of service for the affected devices.

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

Schneider Electric's corporate headquarters is located in Paris, France, and maintains offices in more than 100 countries worldwide.

The affected products, Magelis, are human-machine interfaces. According to Schneider Electric, the Magelis HMIs are deployed across several sectors including Critical Manufacturing, and Food and Agriculture. Schneider Electric estimates that these products are used worldwide.




### VULNERABILITY CHARACTERIZATION


# VULNERABILITY OVERVIEW


UNCONTROLLED RESOURCE CONSUMPTION

An attacker can open multiple connections to a targeted web server and keep connections open preventing new connections from being made, rendering the web server unavailable during an attack.

CVE-2016-8367 has been assigned to this vulnerability. Schneider Electric's CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).



UNCONTROLLED RESOURCE CONSUMPTION

An attacker may be able to disrupt a targeted web server, resulting in a denial of service. The disruption requires the affected device to be rebooted in order to regain operation.

CVE-2016-8374 has been assigned to this vulnerability. Schneider Electric's CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).






### VULNERABILITY DETAILS


# EXPLOITABILITY

These vulnerabilities could be exploited remotely.


# EXISTENCE OF EXPLOIT

Detailed vulnerability information is publicly available that could be used to develop an exploit that targets these vulnerabilities.


# DIFFICULTY

An attacker with low skill would be able to exploit these vulnerabilities.




### MITIGATION

Schneider Electric is working to release new versions for the affected products that mitigate the identified vulnerabilities, which is planned for release by the end of March 2017.


Schneider Electric recommends that users apply the following measures to minimize potential exposure:

Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.

Minimize potential attack surface by leaving the Web Gate Server set to its default disabled state if it is not needed.

Place control system networks and devices behind firewalls, and isolate them from the business network.

Limit traffic on the local network with managed switches.

Where possible, avoid Wi-Fi capabilities; but when Wi-Fi is essential, use only secure communications (such as WPA2 encryption).

Do not grant access to unknown computers.

When remote access is essential, use secure methods, such as Virtual Private Networks (VPNs); and ensure the remote access solution(s), as well as the remote computer(s), are kept up-to-date with the latest security patches.



For further information on vulnerabilities, please visit the Schneider Electric cybersecurity web page at:
http://www.schneider-electric.com/en/download/document/SEVD-2016-302-01/