User Manual

Cybersecurity Concepts – How to Secure the System
Web Browser Security
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In the end what must be done is to enable TLS 1.2 on the machines running the XBAP
browser client in the registry (on Windows 10 only the last two entries are needed):
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityPro
viders\SCHANNEL\Protocols\TLS 1.2\Client
DisabledByDefault (type = DWORD, Value = 0 hexadecimal)
Enabled (type = DWORD, Value = 1 hexadecimal)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NetFramework\v4.0.30319
SchUseStrongCrypto (type = DWORD, Value = 1 hexadecimal)
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\.NetFramework
\v4.0.30319
SchUseStrongCrypto (type = DWORD, Value = 1 hexadecimal)
The ClickOnce client is not impacted. It runs automatically using TLS 1.2 when the
protocol is available on the client.
● Windows SMBv1 Remote Code Execution Vulnerabilities
Remote code execution vulnerabilities exist in the way that the Microsoft Server
Message Block 1.0 (SMBv1) server handles certain requests. An attacker who
successfully exploited the vulnerabilities could gain the ability to execute code on the
target server.
To exploit the vulnerability, in most situations, an unauthenticated attacker could send
a specially crafted packet to a targeted SMBv1 server.
The EternalBlue exploit targets a vulnerability (addressed in Microsoft Security Bulletin
MS17-010) in the SMBv1 protocol, through port 445. During an attack, black hats scan
the internet for exposed SMB ports, and if found, launch the exploit code. If the target
is vulnerable, the attacker will then run a payload of the attacker’s choice on the
target. This was the mechanism behind the effective distribution of WannaCryptor.D
ransomware across networks.
● Mitigating Factors: Disable SMBv1 in Windows and Windows Server
See the following references:
https://support.microsoft.com/en-sg/help/2696547/how-to-detect-enable-and-disable-
smbv1-smbv2-and-smbv3-in-windows-and
https://docs.microsoft.com/en-us/windows/security/threat-protection/security-policy-
settings/microsoft-network-server-digitally-sign-communications-always
https://blogs.technet.microsoft.com/filecab/2012/05/03/smb-3-security-enhancements-
in-windows-server-2012/
Patching
All components (such as virtualization software, operating systems or anti-malware
software) should always be running with the latest security patches. It is not within the
control of Siemens to provide patches for components that are operated with Desigo
CC but do not originate from Siemens, such as client operating systems.
● Use a proper discovery service
The only way to know if a breach or vulnerability exists is to employ broad discovery
capabilities. A proper discovery service entails a combination of active and passive
discovery features and the ability to identify physical, virtual, and on and off premise
systems that access your network. Developing this current inventory of production
systems, including everything from IP addresses, OS types and versions and physical