#VU17385 Input validation error in SIMATIC S7-1500 CPU - CVE-2018-16558

Vulnerability identifier: #VU17385

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-2018-16558

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC S7-1500 CPU
Hardware solutions / Firmware

Vendor: Siemens

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send specially crafted network packets to Port 80/tcp or 443/tcp and cause a denial of service on the device.

Mitigation
Update to version 2.5 or later.

Vulnerable software versions

SIMATIC S7-1500 CPU: before 2.5

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External links
https://support.industry.siemens.com/cs/de/en/view/109478459

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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.