SCADA Vulnerabilities & Exposures (SVE)

CRITIFENCE® SCADA Vulnerabilities and Exposures Database (SVE)

[SVE-688114885] Siemens SIMATIC PCS 7, SIMATIC WinCC, SIMATIC WinCC Runtime Professional, and SIMATIC NET PC Software

Date Type Platform Author EDB-ID CVE-ID OSVDB-ID Download App SIS Signature
2018-03-29OtherSiemensVladimir Dashchenko from Kaspersky Lab and independent researcher cdev1 reported this vulnerability to Siemens.N/ACVE-2018-4832 N/AN/AN/A

Source

						
							
								
#
# Siemens SIMATIC PCS 7, SIMATIC WinCC, SIMATIC WinCC Runtime Professional, and SIMATIC NET PC Software
#


### VULNERABLE VENDOR
Siemens


### VULNERABLE PRODUCT
SIMATIC PCS 7, SIMATIC WinCC, SIMATIC WinCC Runtime Professional, and SIMATIC NET PC Software 


### RESEARCHER
Vladimir Dashchenko from Kaspersky Lab and independent researcher cdev1 reported this vulnerability to Siemens.


### AFFECTED PRODUCTS
Siemens reports that the vulnerability affects the following SIMATIC products:

OpenPCS 7 V7.1 and earlier,
OpenPCS 7 V8.0: All versions,
OpenPCS 7 V8.1: All versions,
OpenPCS 7 V8.2: All versions,
OpenPCS 7 V9.0: All versions prior to V9.0 Upd1,
SIMATIC BATCH V7.1 and earlier,
SIMATIC BATCH V8.0: All versions,
SIMATIC BATCH V8.1: All versions,
SIMATIC BATCH V8.2: All versions,
SIMATIC BATCH V9.0: All versions prior to V9.0 SP1,
SIMATIC NET PC-Software: All versions,
SIMATIC PCS 7 V7.1 and earlier,
SIMATIC PCS 7 V8.0: All versions,
SIMATIC PCS 7 V8.1: All versions,
SIMATIC PCS 7 V8.2: All versions,
SIMATIC PCS 7 V9.0: All versions prior to V9.0 SP1,
SIMATIC Route Control V7.1 and earlier,
SIMATIC Route Control V8.0: All versions,
SIMATIC Route Control V8.1: All versions,
SIMATIC Route Control V8.2: All versions,
SIMATIC Route Control V9.0: All versions prior to V9.0 Upd1,
SIMATIC WinCC Runtime Professional: All versions prior to V14 SP1 Upd5,
SIMATIC WinCC 7.2 and earlier,
SIMATIC WinCC 7.3: All versions prior to WinCC 7.3 Upd16, and
SIMATIC WinCC 7.4: All versions prior to V7.4 SP1 Upd4



### IMPACT
Successful exploitation of this vulnerability could allow an attacker to cause a denial-of-service condition on the remote and local communication functionality of the affected products. A system reboot is required to recover.


### VULNERABILITY OVERVIEW
IMPROPER INPUT VALIDATION CWE-20
Specially crafted messages sent to the RPC service of the affected products could cause a denial-of-service condition on the remote and local communication functionality of the affected products.
A reboot of the system is required to recover the remote and local communication functionality.
CVE-2018-4832 has been assigned to this vulnerability.
A 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)





### BACKGROUND
Critical Infrastructure Sectors: Chemical, Energy, Food and Agriculture, Water and Wastewater Systems.
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Germany




### MITIGATION

Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:

Upgrade to a newer PCS 7 version.

Ensure that SIMATIC WinCC, SIMATIC WinCC Runtime Professional and SIMATIC PCS 7 stations communicate via encrypted channels (i.e., activate feature “Encrypted Communication” in SIMATIC WinCC V7.3 or newer and SIMATIC PCS 7 V8.1 or newer). Enabling “Encrypted Communication” completely mitigates the vulnerability.

Apply cell protection concept.

Use VPN for protecting network communication between cells.

Apply Defense-in-Depth.

Siemens has released updates for several affected products and recommends users update to the new version. Siemens is preparing further updates and recommends specific countermeasures until patches are available:

SIMATIC PCS 7 V9.0: Install V9.0 SP1:

Contact local support.

SIMATIC WinCC Runtime Professional: Update to V14 SP1 Upd5:

https://support.industry.siemens.com/cs/ww/en/view/109747394


SIMATIC WinCC V7.3: Update to WinCC 7.3 Upd16:

https://support.industry.siemens.com/cs/ww/en/view/109756123


SIMATIC WinCC V7.4: Update to V7.4 SP1 Upd4
https://support.industry.siemens.com/cs/ww/en/view/109753031


As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to run the devices in a protected IT environment, Siemens particularly recommends that users configure the environment according to Siemens’ Operational Guidelines for Industrial Security


and follow the recommendations in the product manuals.

Additional information on industrial security by Siemens can be found at:

https://www.siemens.com/industrialsecurity


For more information on this vulnerability and associated software updates, please see Siemens security advisory SSA-348629 on their website:

https://www.siemens.com/cert/advisories