Vulnerability identifier: #VU15304

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-13805

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC ET 200SP Open Controller
Server applications / SCADA systems
SIMATIC S7-1500 Software Controller
Server applications / SCADA systems
SIMATIC S7-1500 CPU
Hardware solutions / Firmware

Vendor: Siemens

Description

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

The vulnerability exists due to an error when processing malicious input. A remote attacker can send a large number of specially crafted packets to the PLC and cause the PLC to lose its ability to communicate over the network.

Mitigation
Update to version 2.5.

Vulnerable software versions

SIMATIC ET 200SP Open Controller: All versions

SIMATIC S7-1500 CPU: All versions

SIMATIC S7-1500 Software Controller: All versions

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External links
http://cert-portal.siemens.com/productcert/pdf/ssa-347726.pdf

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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.