#VU11448 Improper input validation in Siemens products - CVE-2018-4832

Vulnerability identifier: #VU11448

Vulnerability risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-4832

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenPCS 7
Server applications / SCADA systems
SIMATIC BATCH
Server applications / SCADA systems
SIMATIC NET PC Software
Server applications / SCADA systems
SIMATIC PCS 7
Server applications / SCADA systems
SIMATIC Route Control
Server applications / SCADA systems
SIMATIC WinCC Runtime Professional
Server applications / SCADA systems
Siemens SIMATIC WinCC
Server applications / SCADA systems

Vendor: Siemens

Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to improper input validation. A remote attacker can send specially crafted messages to the RPC service of the affected products and cause denial-of-service condition on the remote and local communication functionality.

Mitigation
Install update from vendor's website.

Vulnerable software versions

OpenPCS 7: 7.1 - 9.0

SIMATIC BATCH: 7.1 - 9.0

SIMATIC NET PC Software: All versions

SIMATIC PCS 7: 7.1 - 9.0

SIMATIC Route Control: 7.1 - 9.0

SIMATIC WinCC Runtime Professional: 13.0 - 14.0

Siemens SIMATIC WinCC: 7.0 SP1 - 7.4

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External links
https://www.siemens.com/global/en/home/products/services/cert.html#SecurityPublications

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.